Journal articles on the topic 'Basal stem application'
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1
DiTomaso, Joseph, and Guy Kyser. "Control of Ailanthus altissima Using Stem Herbicide Application Techniques." Arboriculture & Urban Forestry 33, no. 1 (January 1, 2007): 55–63. http://dx.doi.org/10.48044/jauf.2007.007.
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Three herbicides were tested using four stem application techniques for control of both single trunks and clumps of tree-of-heaven [Ailanthus altissima (Miller) Swingle]. Imazapyr, triclopyr, and glyphosate were applied using cut stump, stump injection, and stem injection techniques. Imazapyr and triclopyr were also applied as a basal bark treatment. Treatments were compared against manual cutting and untreated controls. Untreated cut stems did not provide control of tree-of-heaven. Cut stump treatment with imazapyr and triclopyr (20% v/v in oil) resulted in more than 90% reduction in both vigor ratings and resprouting of single stems and clumps. In contrast, stump injection applications were ineffective with all herbicides. For stem injection treatments, undiluted imazapyr gave the best results (>95% canopy reduction), but glyphosate also provided excellent control (92% canopy reduction). Removing stems 4, 8, or 12 months after treatment did not impact the level of control with imazapic. Imazapic at half the standard rate also gave good control of multistemmed clumps. Basal bark treatments with imazapyr or triclopyr (20% v/v in oil) gave equally good results, providing nearly complete control. Triclopyr is less selective than imazapyr and thus offers a better option when desirable vegetation surrounds the stems. These results provide several effective options for the control of tree-of-heaven in both urban and riparian sites.
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Miller, James H. "Streamline Basal Application of Herbicide for Small-Stem Hardwood Control." Southern Journal of Applied Forestry 14, no. 4 (November 1, 1990): 161–65. http://dx.doi.org/10.1093/sjaf/14.4.161.
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Abstract The effectiveness of low-volume basal application of herbicide—"streamline" application—was evaluated on 25 hardwood species and loblolly pine. Test mixtures were step-wise rates of Garlon 4 mixed in diesel fuel with a penetrant added. Most comparisons tested 10%, 20%, and 30% mixtures of Garlon 4, while tests with saplings and small trees used 20%, 30%, and 40%. Target stems ranged from 2 ft tall to 6 in. dbh. Applications were made in February, using pressure-regulated handguns equipped with straight stream nozzles attached to backpack sprayers. Two bands of the herbicide mixture were applied to two sides of all stems. After 18 months, susceptible hardwood species with greater than 80% average control at all three Garlon rates were water oak (Quercus nigra), am. hornbeam (Carpinus caroliniana), black locust (Robinia pseudoacacia), boxelder (Acer negundo), huckleberry (Vaccinium elliottii), sumacs (Rhus spp.), southern bayberry (Myrica cerifera), and mountain-laurel (Kalmia latifolia). Tolerant species with less than 40% control were sourwood (Oxydendrum arboreum), titi (Cliftonia monophylia), and yellow poplar (Liriodendron tulipifera) (>1 in. groundline diameter). Treatment of loblolly pines resulted in an average of 22% mortality. Smaller stems were more readily killed than larger stems for all species. South. J. Appl. For. 14(4):161-165.
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Holmes, Katherine A., and Alison M. Berry. "Evaluation of Off-Target Effects Due to Basal Bark Treatment for Control of Invasive Fig Trees (Ficus carica)." Invasive Plant Science and Management 2, no. 4 (October 2009): 345–51. http://dx.doi.org/10.1614/ipsm-09-029.1.
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AbstractBasal bark treatments involve the application of concentrated herbicide solution on each individual stem of targeted plants. When applied to stands of invasive plants with high stem densities, basal bark treatments may result in the use of large quantities of herbicide in a given area. The effect of basal bark treatments using a solution of 25% triclopyr herbicide and 75% methylated seed oil was tested on research plots located in six different groves of invasive fig, a densely stemmed, problematic invader of riparian forests in California. The experimental treatments resulted in application rates that were equivalent to 28 to 44 kg ae/ha, greatly in excess of the labeled maximum use rate of 9 kg ae/ha (8 lb/ac). At 175 d after application, soils near the fig trunks contained high levels of triclopyr residues (up to 6.6 ppmw), suggesting that the chemical made its way into soils during this period and was not completely degraded. Although the mortality of native plants transplanted into treated fig groves was low (up to 16%), it was significantly greater than the mortality experienced by native plants transplanted into untreated control sites (0%). Although effective in controlling invasive fig trees (> 99% mortality), the high herbicide application rates from basal bark treatment preclude the use of this treatment in large fig groves. These treatments may be appropriate, however, when fig groves are small or isolated enough to prevent overapplication on a per-area basis. In addition, neither limited basal bark applications of triclopyr (< 40% of stems treated) nor foliar spray treatments of 2% glyphosate were effective control measures. Further investigation is needed on ways to control large invasive fig groves.
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Blythe, Eugene K., Jeff L. Sibley, Ken M. Tilt, and John M. Ruter. "Foliar Application of Auxin for Rooting Stem Cuttings of Selected Ornamental Crops." Journal of Environmental Horticulture 21, no. 3 (September 1, 2003): 131–36. http://dx.doi.org/10.24266/0738-2898-21.3.131.
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Abstract Research was conducted to determine whether a foliar spray application of the commercial root-promoting formulation Dip 'N Grow® [10,000 ppm indole-3-butyric acid (IBA) and 5,000 ppm 1-naphthaleneacetic acid] or the potassium (K) salt of IBA (K-IBA) would be as effective as a basal quick-dip for rooting stem cuttings of selected ornamentals. Cuttings of Chrysanthemum pacficum sprayed with Dip 'N Grow® at 50 + 25 ppm IBA + NAA or K-IBA at 0 to 50 ppm showed generally similar root development measures compared to a basal quick-dip; an exception was 10 ppm K-IBA which produced greater total root length. Cuttings of Forsythia x intermedia ‘Lynwood Gold’ typically did not differ in root development under the two application methods, but cuttings sprayed with Dip 'N Grow® at 0 + 0 to 10 + 5 ppm IBA + NAA exhibited greater shoot growth 80 days after sticking (insertion into the rooting substrate) than cuttings receiving a basal quick-dip. Root and shoot development measures were similar or lower for cuttings of Abelia x grandiflora, Hydrangea paniculata, and Lagerstroemia (indica x fauriei) ‘Natchez’ sprayed with auxin compared to a basal quick-dip.
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Kochenderfer, Jeffrey D., James N. Kochenderfer, David A. Warner, and Gary W. Miller. "Preharvest Manual Herbicide Treatments for Controlling American Beech in Central West Virginia." Northern Journal of Applied Forestry 21, no. 1 (March 1, 2004): 40–49. http://dx.doi.org/10.1093/njaf/21.1.40.
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Abstract Application costs and efficacy were determined for manual preharvest herbicide treatments applied to control American beech (Fagus grandifolia Ehrh.) that was interfering with the establishment and development of black cherry (Prunus serotina Ehrh.) in central West Virginia. The treatments consisted of four levels of basal area reduction using combinations of two application methods: hack-and-squirt injection with Accord (41.5%) and basal spraying with Garlon 4 (61.6% butoxyethyl ester). The treatments were applied in late Aug. 2000 and evaluated 12 months after treatment. A numerical rating system ranging from 1 to 7 (0–100% crown affected), based on a visual estimation of top kill, was used to evaluate the efficacy of each treatment. Trees receiving a rating of 5 (75% crown control) or greater were considered controlled. After 12 months, almost complete control (99%) was achieved with both application methods. Injection of ≥6.0-in. dbh beech stems also controlled 52% and 21.6% of small untreated beech understory stems in the 2-ft tall to 0.9-in. dbh and 1.0- to 5.9-in. dbh classes, respectively. Average application costs (chemical and labor) ranged from $39.28/ac for injection of 159 stems/ac ≥6 in. dbh to $80.32/ac for basal spraying 396 stems/ac in the 1.0- to 5.9-in. dbh class and $230.09/ac for basal spraying 3,743 stems/ac in the 2-ft tall to 0.9-in. dbh class. Basal spraying the numerous small 2-ft tall to 0.9-in. dbh stems dramatically increased treatment costs. Black cherry occupied 30% of total stand basal area and accounted for 91% of total stand value ($6,288.10/ac). Application costs expressed as a percentage of total stand value ranged from <1% for the injection-only treatment up to 6.5% for combination basal spray and injection treatments. The individual stem herbicide application methods described here are applicable to the steep topography and small nonindustrial ownerships found in Appalachia.
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Smith, Bryan A., Artem Sokolov, Vladislav Uzunangelov, Robert Baertsch, Yulia Newton, Kiley Graim, Colleen Mathis, Donghui Cheng, Joshua M. Stuart, and Owen N. Witte. "A basal stem cell signature identifies aggressive prostate cancer phenotypes." Proceedings of the National Academy of Sciences 112, no. 47 (October 12, 2015): E6544—E6552. http://dx.doi.org/10.1073/pnas.1518007112.
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Evidence from numerous cancers suggests that increased aggressiveness is accompanied by up-regulation of signaling pathways and acquisition of properties common to stem cells. It is unclear if different subtypes of late-stage cancer vary in stemness properties and whether or not these subtypes are transcriptionally similar to normal tissue stem cells. We report a gene signature specific for human prostate basal cells that is differentially enriched in various phenotypes of late-stage metastatic prostate cancer. We FACS-purified and transcriptionally profiled basal and luminal epithelial populations from the benign and cancerous regions of primary human prostates. High-throughput RNA sequencing showed the basal population to be defined by genes associated with stem cell signaling programs and invasiveness. Application of a 91-gene basal signature to gene expression datasets from patients with organ-confined or hormone-refractory metastatic prostate cancer revealed that metastatic small cell neuroendocrine carcinoma was molecularly more stem-like than either metastatic adenocarcinoma or organ-confined adenocarcinoma. Bioinformatic analysis of the basal cell and two human small cell gene signatures identified a set of E2F target genes common between prostate small cell neuroendocrine carcinoma and primary prostate basal cells. Taken together, our data suggest that aggressive prostate cancer shares a conserved transcriptional program with normal adult prostate basal stem cells.
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R. Bhaskaran, N. Ramadoss, A. Karthikeyan, and T.K. Ramachandran. "BIOLOGICAL CONTROL OF BASAL STEM ROT DISEASE OF COCONUT." CORD 9, no. 01 (June 1, 1993): 34. http://dx.doi.org/10.37833/cord.v9i01.263.
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Trichoderma harzianum multiplied in farm yard manure and applied with neem cake to coconut palm affected by basal stem rot disease reduced the severity of the disease. T harzianum applied in coconut basins survived for more than one year, though the population gradually declined after four months. Application of Azotobacter or phosphobacterium (200 g peat based inoculurn) to basal stern rot disease affected coconut gave lesser increase in disease index than control and increased the nut yield.
Tapping for neera production in mild and moderately diseased palms showed lesser disease index than untapped palms of corresponding disease severity.
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Li, Guohui, Xin Chen, Chiyan Zhou, Zijun Yang, Chenhui Zhang, Zepeng Huang, Wen Pan, and Ke Xu. "Vascular Bundle Characteristics of Different Rice Variety Treated with Nitrogen Fertilizers and Its Relation to Stem Assimilates Allocation and Grain Yield." Agriculture 12, no. 6 (May 28, 2022): 779. http://dx.doi.org/10.3390/agriculture12060779.
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The vascular bundle plays a vital role in photoassimilates transportation in rice. However, the vascular bundle characteristics of basal internode and its relationship with stem assimilates allocation and yield remain unclear. In this study, experiments with four different types of rice varieties subjected to three nitrogen application levels were conducted. The results showed that large vascular bundles (LVB) and small vascular bundles (SVB)-related traits of basal internode exhibited genotypic differences. Indica-japonica hybrid varieties had the highest number of cross sectional areas and phloem areas of LVB and SVB, thus the highest stem nonstructural carbohydrates (NSC) translocation, grain filling percentage and grain yield, followed by indica hybrid varieties and indica conventional varieties, and those were the lowest in japonica conventional varieties. The LVB and SVB related traits were significantly and positively correlated with stem NSC translocation, grain filling percentage and grain yield, respectively These results suggested that improving the characteristics of basal internodes was beneficial to enhance stem NSC translocation and consequently increase grain yield. Nitrogen application increased LVB and SVB related traits. Therefore, varieties with developed vascular bundles of basal internodes and cultivation techniques for improving vascular bundle related traits should be considered as the effective route for increasing grain yield.
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Bovey, Rodney W., Hugo Hein, and Robert E. Meyer. "Concentration of 2,4,5-T, Triclopyr, Picloram, and Clopyralid in Honey Mesquite (Prosopis glandulosa) Stems." Weed Science 34, no. 2 (March 1986): 211–17. http://dx.doi.org/10.1017/s0043174500066698.
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Triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid}, 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid), and clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) were applied to honey mesquite (Prosopis glandulosaTorr. # PRCJG) on seven different dates about every 3 weeks from May to September in 1980 and 1981. Concentrations of 2,4,5-T or triclopyr in stem tissue were usually less than 2 μg/g fresh weight regardless of date of application. Concentrations of picloram and clopyralid were as high as 11 and 22 μg/g fresh weight, respectively, in upper stem phloem at some dates of application. Higher concentrations of all herbicides were detected in upper stem phloem than in the upper stem xylem or basal stem phloem or xylem. More herbicide tended to be detected in stems when herbicides were applied early (May and June) than late (August and September) in the season. Concentrations of triclopyr and picloram recovered from honey mesquite stems were about 25% greater at 3 than at 30 days after treatment, whereas concentrations of 2,4,5-T and clopyralid were about 50% greater at 3 than at 30 days after application.
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Carpenter, W. J., and J. A. Cornell. "Auxin Application Duration and Concentration Govern Rooting of Hibiscus Stem Cuttings." Journal of the American Society for Horticultural Science 117, no. 1 (January 1992): 68–74. http://dx.doi.org/10.21273/jashs.117.1.68.
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The interactions among IBA concentrations and durations of treatment and propagation medium temperatures on the rooting of stem cuttings were compared for cultivars of Hibiscus rosa-sinensk L. Cultivar rooting was rapid with extensive root development for `Pink Versicolor', average for `Jim Hendry', and slow with few roots per cutting for `Silver Anniversary'. The IBA concentration and duration of treatment that cuttings required to reach maximum rooting declined with increase in medium temperature (from 18 to 34C). `Pink Versicolor' stem cuttings receiving 4- to 6-minute basal dips required 8000 ppm IBA with the medium at 18C, 6000 ppm at 26C, and 2500 ppm at 34C, to achieve 100% rooting of the cuttings. `Pink Versicolor' stem cuttings had the most roots at 10,000 ppm IBA, with 10-min stem dips best at 18C, 4 to 8 min at 26C, and 7 to 8 min at 34C. Maximum dry weights per root were achieved at 6000 ppm IBA, with longer basal stem dip durations needed at 18C than 26 or 34C. Lower IBA levels were required for 100% rooting of `Pink Versicolor' than for `Jim Hendry', with highest levels needed for `Silver Anniversary'. The results indicated that the benefits in rooting achieved from higher IBA levels greatly exceeded those that could be achieved by increased medium temperature. Chemical name used: indole-3-butyric acid (IBA).
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Bovey, Rodney W., Hugo Hein, and Robert E. Meyer. "Mode of Clopyralid Uptake by Honey Mesquite (Prosopis glandulosa)." Weed Science 36, no. 3 (May 1988): 269–72. http://dx.doi.org/10.1017/s0043174500074841.
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Leaves absorbed high amounts of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) as foliar sprays on honey mesquite (Prosopis glandulosaTorr. # PRCJG) as indicated by concentrations of 10 μg/g fresh wt or more in basal stem phloem by 4 days after treatment. Small quantities of clopyralid (< 1 μg/g) were detected in basal stem phloem after spray applications of clopyralid to defoliated plants or roots treated by soil application. When applied to foliated plants, the 0.56 kg/ha of clopyralid killed 60% or more plants, but none were killed when clopyralid sprays were applied to defoliated plants or when 2.2 kg/ha of clopyralid was applied to the soil. Water, diesel oil plus water, or water plus surfactant were equally effective as clopyralid carriers as foliar sprays.
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Wu, Meikang, Hao Jiang, Zhiheng Wei, Wanchun Li, Kaiyu Gao, Dongchao Wang, Xiaoshuang Wei, et al. "Influence of Nitrogen Application Rate on Stem Lodging Resistance Rice under Dry Cultivation." Agronomy 13, no. 2 (January 31, 2023): 426. http://dx.doi.org/10.3390/agronomy13020426.
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High grain yields of rice (Oryza sativa) under dry cultivation are primarily obtained through high levels of nitrogen (N) input. However, excessive inputs of N increase the risk of lodging. This study aimed to clarify the effect of N application rates on crop morphology, mechanical mechanisms of the stem, and chemical components in the basal stems of rice and their underlying mechanism in association with lodging resistance under dry cultivation. In this study, field experiments on rice were conducted under dry cultivation in early May to early October 2019 and 2020. Six rates of N applied at 0, 70, 140, 210, 280 and 350 kg ha−1 were set at a sowing rate of 150 kg ha−1 with Suijing 18 as the test material. The increased risk of lodging represented by lodging index (LI) and lodging rate with increasing N application was observed under both growing seasons. The plant height, basal internode length, particularly the second internode, and center of gravity height, which positively correlated with the LI, increased significantly with the increase in N application rates. In contrast, internode fullness and carbohydrate content of the basal second (S2) internode, which negatively correlated with LI, decreased significantly with increasing N application rates. A quadratic regression model between N application rates and grain yield showed that better grain yield could be achieved under an N application rate ranging from 210 to 228 kg ha−1. Therefore, the N application rate of (i.e., 210–228 kg N ha−1) could be recommended for the Suijing18 variety under dry cultivation in central Jilin Province for achieving high grain yield and great lodging resistance.
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Tapppeiner II, John C., Robert J. Pabst, and Michael Cloughesy. "Stem Treatments to Control Tanoak Sprouting." Western Journal of Applied Forestry 2, no. 2 (April 1, 1987): 41–45. http://dx.doi.org/10.1093/wjaf/2.2.41.
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Abstract Applying 2,4-D, triclopyr, and picloram + 2,4-D to cut surfaces of tanoak (Lithocarpus densiflorus) on southwest Oregon sites in November or February increased mortality and reduced total sprout length and clump area relative to May or August applications. Injecting the same herbicides into stem frills caused 80 to 99% mean crown dieback for November, February, and May applications, but only 47% for August applications. Spraying triclopyr diluted with diesel oil to 1 5 or 3.0% on stem bases caused 64% mean crown dieback for August applications but only 28% averaged over the other three dates. Both frill and spray treatments reduced by about 1.5 to 3.0 times the sprout length and clump area of trees felled within 3 months of treatments, compared to untreated trees. Tanoak can be effectively controlled by treating cut surfaces when felling, and by stem injection or basal spray 3 months before harvesting or slashing for site preparation. Cut-surface application or injection from fall through early spring is likely to be most effective. West. J. Appl. For. 2(2):41-45, April 1987.
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Kochenderfer, Jeffrey D., and James N. Kochenderfer. "Efficacy of Stem Injection Treatments on Striped Maple in Central West Virginia." Northern Journal of Applied Forestry 25, no. 2 (June 1, 2008): 106–8. http://dx.doi.org/10.1093/njaf/25.2.106.
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Abstract Hack-and-squirt injection treatments were applied to individual striped maple (Acer pennsylvanicum L.) stems and to the largest stem in sprout clumps in a 25-year-old clearcut in central West Virginia to evaluate seasonal efficacy of imazapyr as Arsenal (28.7%) and glyphosate as Glypro Plus (41.0%) in water carriers. Complete control of injected stems was achieved with all treatments. However, the Arsenal treatments resulted in greater control of basal sprouting, untreated striped maple stems, and sprout clumps. Treatment efficacies were higher in Septemberthan in June. Land managers can use the application methods described here and a 6% solution of Arsenal to effectively control individual striped maple stems and sprout clumps.
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Butler, Colin R., Robert E. Hynds, Kate H. C. Gowers, James M. Brown, Dani Do Hyang Lee, Vitor H. Teixeira, Nicholas J. Hamilton, Martin A. Birchall, Christopher O'Callaghan, and Sam M. Janes. "Co-culture-expanded human basal epithelial stem cells for application in tracheal tissue engineering." Lancet 387 (February 2016): S23. http://dx.doi.org/10.1016/s0140-6736(16)00410-4.
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Gil, Chan-Saem, Soon-Jae Kwon, Ho-Young Jeong, Chanhui Lee, Oak-Jin Lee, and Seok-Hyun Eom. "Blue Light Upregulates Auxin Signaling and Stimulates Root Formation in Irregular Rooting of Rosemary Cuttings." Agronomy 11, no. 9 (August 28, 2021): 1725. http://dx.doi.org/10.3390/agronomy11091725.
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Irregular rooting of rosemary stem cuttings, causing differences in either stem maturation or responses to growth conditions, restricts uniform production. Here, rooting efficiency of apical, middle, and basal cuttings from rosemary stems was evaluated by controlling light conditions to prevent irregular rooting. The types of light applied to the cuttings were natural sunlight (NSL), fluorescent, red, and blue (BL) light. Among these light sources, BL significantly induced root growth of not only basal cuttings, but also apical and middle cuttings, whereas NSL induced poor root formation in apical and middle cuttings. In particular, the roots of apical cuttings exposed to BL grew twice as fast as those exposed to other types of light. The overexpression of BL-induced IAA synthetic genes confirmed the rooting patterns. IAA synthetic genes were significantly upregulated by BL in the apical and middle cuttings. Irradiating with 50 μmol photons m−2 s−1 BL resulted in similar root production levels among the cutting positions with high biomass, guaranteeing the successful production of uniform cuttings. Thus, the application of proper high-intensity BL promoted healthy, similar-quality rosemary cuttings among stem cutting positions.
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Blythe, Eugene K., Jeff L. Sibley, Ken M. Tilt, and John M. Ruter. "Auxin Application to Stem Cuttings of Selected Woody Landscape Plants by Incorporation Into a Stabilized Organic Rooting Substrate." Journal of Environmental Horticulture 22, no. 2 (June 1, 2004): 63–70. http://dx.doi.org/10.24266/0738-2898-22.2.63.
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Abstract Stem cuttings of Buxus sinica var. insularis ‘Wintergreen’, Elaeagnus x ebbingei, Ficus benjamina, Gardenia augusta ‘Radicans’, Ilex glabra ‘Nigra’, Ilex vomitoria ‘Nana’, Juniperus conferta ‘Blue Pacific’, Ternstroemia gymnanthera, and Trachelospermum asiaticum were inserted into a stabilized organic rooting substrate (plugs comprised of peat and a polymer binder) that had been soaked in water, aqueous solutions of K-IBA (15 to 75 ppm), or K-IBA + K-NAA (15 ppm + 7.5 ppm to 60 ppm + 30 ppm). Rooting and initial shoot growth responses were compared with cuttings receiving a basal quick-dip in K-IBA (1000 ppm) or K-IBA + K-NAA (1000 ppm + 500 ppm). Rooting percentage, number of roots per rooted cutting, and total root length per rooted cutting for cuttings rooted in auxin-treated plugs were similar to or greater than cuttings receiving a basal quick-dip; lesser results were obtained in a few cases with K-IBA + K-NAA. Percent of rooted cuttings with new shoots and shoot length per rooted cutting for cuttings rooted in plugs treated with K-IBA were mostly similar to cuttings receiving a basal quick-dip in K-IBA, while cuttings rooted in plugs treated with K-IBA + K-NAA exhibited similar or lesser results compared to cuttings receiving a basal quick-dip in K-IBA + K-NAA.
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Santos, Kathryn M., Paul R. Fisher, and William R. Argo. "Stem Versus Foliar Uptake During Propagation of Petunia ×hybrida Vegetative Cuttings." HortScience 44, no. 7 (December 2009): 1974–77. http://dx.doi.org/10.21273/hortsci.44.7.1974.
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Nutrient uptake during adventitious root formation is not clearly understood, resulting in variable fertilization strategies in propagation and increased potential for nutrient deficiency or nutrient runoff. The objective was to quantify rooting response to fertility treatments and tissue nutrient concentration changes in response to basal or apical nutrient supply during three rooting phases in propagation of Petunia ×hybrida ‘Supertunia Royal Velvet’ and ‘Supertunia Priscilla’ stem tip cuttings. One of two treatments [a complete fertilizer solution (in mg·L−1) 56 NO3-N, 19 NH4-N, 13 phosphorus, 88 potassium, 39 calcium, 28 magnesium, 20 sulfur, 11 sodium, 1.1 iron, 0.5 manganese, 0.5 zinc, 0.25 copper, 0.29 boron, 0.1 molybdenum, and 0.01 aluminum] or clear tap water was applied to the cuttings. Tissue N–P–K concentrations declined as plant development increased from Stage 0 to 3 regardless of fertilizer treatment or location applied. Foliar application of N–P–K during propagation maintained tissue nutrient concentration at higher levels before Stage 2 (initial root emergence) compared with plants that received clear water only; however, overall, a decline in concentration was measured from Stage 1 to Stage 3. Measurable N–P–K uptake occurred during root development from the foliar and basal portions of the cuttings. Basal fertilizer applications resulted in increased root length and root number compared with plants treated with clear water. These results emphasize that nutrient uptake occurs from both the stem and foliar portion of Petunia cuttings, and nutrient availability at the stem base at root emergence improves root development.
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Wang, Le, Fei Gao, Liguang Zhang, Li Zhao, Yan Deng, Hongxia Guo, Lixia Qin, and Chuangyun Wang. "Effects of Basal Selenium Fertilizer Application on Agronomic Traits, Yield, Quality, and Se Content of Dryland Maize." Plants 11, no. 22 (November 15, 2022): 3099. http://dx.doi.org/10.3390/plants11223099.
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To explore the efficiency of selenium (Se) fertilizer application in dryland maize, we tested five Se fertilizer application treatments: 0 g ha−1 (Se0), 75 g ha−1 (Se1), 150 g ha−1 (Se2), 225 g ha−1 (Se3), and 300 g ha−1 (Se4). Compared with Se0, Se2 increased the leaf area, chlorophyll content, internode length, plant height, and ear height by 7.95%, 3.20%, 13.19%, 1.89%, and 7.98%, respectively. Se2 and Se3 significantly affected the stem internode diameter, cortex thickness, and cellulose content, which were positively correlated with lodging resistance. Compared with Se0, Se3 promoted the contents of soluble sugar, crude protein, crude fat, and starch in grains, which increased by 9.48%, 6.59%, 1.56%, and 4.82%, respectively. It implies that maize grain application of Se significantly improves their Se content. Se1 did not observably influence the growth of maize, and the promoting effect of Se4 on maize decreased. The lodging resistance of maize as analyzed by Pearson correlation analysis correlated with the application of Se fertilizer. It proved that higher yield, grain quality, grain Se content, and lodging resistance of stems were concerned with Se fertilizer application in the range of 150–225 g ha−1. The results provide useful information for Se fertilizer treatment in dryland maize.
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Farias-Larios, J., M. Orozco, S. Guzman, and A. Gutiirrez. "Effectiveness of Different Applications of Imidacloprid for the Control of Sweetpotato Whitefly and Muskmelon Yield." HortScience 32, no. 3 (June 1997): 435E—436. http://dx.doi.org/10.21273/hortsci.32.3.435e.
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Sweetpotato whitefly (Bemisia tabaci Gennadius) is one of the serious pests on cucurbits and causes injury by sucking sap and by the transmission of virus. In Western Mexico, melon and other vegetable crops have been subjected to losses as a results of whitefly feeding and whitefly-transmitted virus infection. Traditional control is based in the Metamidophos and Endosulfan applications (more than 10 times). Recently, Imidacloprid has been reported as new alternative to whitefly control. Thus, this study was conducted to determine the effect of Imidacloprid under different applications methods on sweetpotato whitefly populations and cantaloupe yield. Ten treatments were evaluated: 1) seed + basal stem, 2) seed + soil at 8 cm, 3) seed + soil (near to seed), 4) seed + soil (seedlings emergence), 5) seed only, 6) basal stem, 7) soil (plant emerged), 8) foliage, 9) Metamidophos and Endosulfan (regional application), and 10) control, without application. These were arranged in a randomized complete-block design with four replications. Each replication had four beds 7.5 m long. Number of whitefly adults was determined weekly on 24 plants selected at random for each treatment (two leaves/plant). At 22, 39, 57, and 73 days after showing, the whitefly nymphs/cm2 were also counted. Imidacloprid applied to foliage five times showed the best whitefly control during the entire crop season, reducing injury and increasing melon yield at 1346.7 cartons/ha, while Metamidophos and Endosulfan showed an intermediate effect (1073.6 cartons/ha).
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Chandrasena, Nimal R., and Geoff R. Sagar. "The Effect of Site of Application of14C-Fluazifop on Its Uptake and Translocation by Quackgrass (Agropyron repens)." Weed Science 35, no. 4 (July 1987): 457–62. http://dx.doi.org/10.1017/s0043174500060380.
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The effect of site of application on uptake and translocation of the butyl ester of fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy] phenoxy] propanoic acid} by quackgrass [Agropyron repens(L.) Beauv. # AGRRE] was investigated using14C-labeled herbicide and intact plants. Uptake and distribution of the label were significantly greater from the abaxial than from the adaxial surface of leaves. The addition of a nonionic surfactant4to the treatment solution increased the uptake significantly only through the adaxial surface. Uptake of14C by the apical, middle, and basal regions of the treated leaf lamina did not differ significantly. However, movement of the14C-label to stem areas and leaves both above and below treated leaves was greater from lamina base applications than from treatments to the lamina apex and middle. The older leaves absorbed more herbicide than did younger leaves, but the pattern of translocation did not differ. Considerably greater translocation occurred from treatments to the outside of the leaf sheaths in the lower regions of the stem than from applications to the upper leaf sheaths, with the14C-label moved to young and old leaves, roots, and rhizomes. Uptake from applications to the outside of the upper leaf sheaths also resulted in improved translocation mainly within the stem areas and into upper leaves.
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O’Brien, Ciara Jade, Vincent Mellor, and Victor Joseph Galea. "Controlling Woody Weed Chinese Elm (Celtis sinensis Pers.) with Stem-Implanted Herbicide Capsules." Plants 11, no. 3 (February 6, 2022): 444. http://dx.doi.org/10.3390/plants11030444.
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Chinese elm [Celtis sinensis Pers.] is an emerging environmental weed naturalised throughout the coastal and riparian (creek-banks, river margins, and streams) regions of eastern Australia. Throughout this introduced range, its management is limited to the application of synthetic herbicides and mechanical clearing operations (terrain and soil type permitting). The current mechanisms of chemical control (basal bark spraying, stem-injection, and cut-stump applications) often result in collateral damage to non-target native species (such as Eucalyptus spp. and Casuarina cunninghamiana Miq.) through herbicidal drift, runoff or leaching into adjacent habitats. This has raised concerns regarding the suitability of synthetic herbicides in ecologically sensitive (e.g., riparian zones, rainforest margins, and woodlands) or low-value habitats, thereby promoting significant developments in the fields of integrated weed management. This study investigated the effectiveness of a novel stem-implantation system for controlling woody weed species in the context of a conserved habitat. A replicated trial (n = 315) was established among a naturally occurring population of C. sinensis. This trial involved the mapping, measurement, and treatment of this invasive species with five encapsulated synthetic herbicides, as well as an untreated control and benchmark treatment (diesel + AccessTM). A significant effect (p < 0.05) on plant vigour and functional canopy was discerned for each assessment period following trial establishment. The highest incidence of mortality was observed among the individuals treated with glyphosate (245 mg/capsule), aminopyralid and metsulfuron-methyl (58.1 and 37.5 mg/capsule) and picloram (10 mg/capsule), achieving a similar response to the basal bark application of diesel and AccessTM (240 g/L triclopyr, 120 g/L picloram, and 389 g/L liquid hydrocarbon). This was also evidenced by a rapid reduction in functional canopy (i.e., no or little living leaf tissue) from three weeks after treatment. Unlike their industry counterparts, these encapsulated herbicides are immediately sealed into the vascular system of the target species by a plug. This significantly minimises the possibility of environmental or operator exposure to synthetic compounds by providing a targeted, readily calibrated herbicide application.
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Latifah, Latifah, Hendrival Hendrival, and Mihram Mihram. "ASOSIASI CENDAWAN ANTAGONIS TRICHODERMA HARZIANUM RIFAI DAN CENDAWAN MIKORIZA ARBUSKULAR UNTUK MENGENDALIKAN PENYAKIT BUSUK PANGKAL BATANG PADA KEDELAI." Jurnal Hama dan Penyakit Tumbuhan Tropika 14, no. 2 (June 30, 2014): 160–69. http://dx.doi.org/10.23960/j.hptt.214160-169.
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Association of antagonistic fungi Trichoderma harzianum Rifai and arbuscular mycorrhizal fungi for controlling the stem rot disease on soybean. The research objective was to study effect of application Trichoderma harzianum and arbuscular mycorrhizal fungi (AMF) in controling stem rot disease caused by Sclerotium rolfsii Sacc on soybean. The research conducted in a Randomized Block Design (RBD) with five treatment levels: (1) without T. harzianum, without AMF, and without S. rolfsii [negative control (C-)], (2) without T. harzianum, without AMF, and S. rolfsii [positive control (C +)], (3) T. harzianum + S. rolfsii; (4) AMF + S. rolfsii, and (5) T. harzianum + AMF + S. rolfsii. Parameters observed were basal stem rot disease development and yield components. The results showed that the application of a mixture of T. harzianum and AMF caused a longer disease incubation period (8.29 days) and the severity of stem base rot disease was 11.67% number of pods per plant (62.53 pods), the number of seeds per plant (225.05 seeds), and the weight of seeds per plant (27.73 g) were higher than that of the application of T. harzianum and AMF separately.
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Nurzannah, S. E., I. Purnamasari, D. R. Siagian, and K. E. L. Ramija. "Potential of Trichoderma and mycorrhizae as biological agents for controlling Ganoderma boninense in oil palm." IOP Conference Series: Earth and Environmental Science 974, no. 1 (January 1, 2022): 012097. http://dx.doi.org/10.1088/1755-1315/974/1/012097.
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Abstract One of the problems in oil palm cultivation is Ganoderma boninense attack, the causal agent of basal stem rot (BSR) disease. Basal stem rot (BSR) is the most feared disease because the plant death rate can reach 80% in one area. The spread of this pathogen is relatively fast and not easy to control because it occurs through root contact between oil palm plants. Alternatives for controlling this disease are by using biological control agents. The purpose of this paper is to analyze the potential of Trichoderma and Arbuscular Mycorrhiza Fungi (AMF) as biological agents and find out the recommendations for the formulation that is effective to control BSR of oil palm. Trichoderma and AMF can inhibit Ganoderma boninense. Recommendations for the best carrier material for the growth of Trichoderma in the field are bran and empty fruit bunch (EFB), while the carrier material for AMF growth is zeolite so that it can extend the latent period to 71 days, disease severity to 38.3%, disease incidence to 46.7%, infection rate to 0.23. The combined application of the AMF formulation and the Trichoderma spp formulation can be recommended as a preventive measure for basal stem rot in oil palm plantations.
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Yang, Ronghua, Jingru Wang, Xiaodong Chen, Yan Shi, and Julin Xie. "Epidermal Stem Cells in Wound Healing and Regeneration." Stem Cells International 2020 (January 29, 2020): 1–11. http://dx.doi.org/10.1155/2020/9148310.
Full textAbstract:
Skin stem cells distributed in the basal layer of the epidermis and hair follicles are important cell sources for skin development, metabolism, and injury repair. At present, great progress has been made in the study of epidermal stem cells at the cellular and molecular levels. Stem cell transplantation is reported to promote skin healing, endothelial cell transformation, and vascular formation. Local stem cells can also be transformed into keratinocytes, sebaceous gland, and other skin-associated tissues. However, the mechanism of action of epidermal stem cells on wound healing and regeneration is not completely clear. This review is aimed at briefly summarizing the biological characteristics of epidermal stem cells and their clinical application in wound healing and tissue regeneration. It further discussed the mechanism of action and the development direction in the future.
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Borges, Vitoria E., Rigoberto M. Matos, Jailton G. Ramos, Patricia F. Silva, Thiago Galvao Sobrinho, Jose Dantas Neto, and Maria S. S. Farias. "Beet Crop under Different Fertilization and Nitrogen Fertigation in Protected Environment." Journal of Agricultural Science 9, no. 9 (August 15, 2017): 131. http://dx.doi.org/10.5539/jas.v9n9p131.
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Chemical fertilizers have been increasingly used in agriculture. The application of these nutrients via irrigation water has been evaluated in order to obtain productive results in agricultural yield. The objective of this research was to evaluate the effect of nitrogen (N) doses, applied by fertigation and associated with different types of basal fertilization, on the growth and production of beet. The experiment was conducted at the Federal University of Campina Grande (UFCG), in a protected environment belonging to the Academic Unit of Agricultural Engineering (UAEA). The adopted statistical design was completely randomized blocks, with three replicates, and the factors were arranged in a 5 × 3 factorial scheme, corresponding to five N doses (0, 50, 100, 150 and 200 mg dm-3 of soil), and three types basal fertilization (soil without fertilizer, earthworm humus, earthworm humus + NPK). At 45 days after transplanting, the number of leaves per plant, plant height, stem diameter, leaf area, green intensity, bulb diameter, stem length, bulb fresh weight, bulb dry weight and total soluble solids (°Brix) were quantified. Both Soil basal fertilization significantly influenced beet growth and production, and the treatment with earthworm humus and earthworm humus + NPK led to the best results for the analyzed variables. The highest N dose promoted the best performance for stem diameter and content of total soluble solids (°Brix).
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Nelson, L. E., and G. L. Switzer. "Response of Nine-Year-Old Plantation Sweetgum to Nitrogen Fertilization in Mississippi." Southern Journal of Applied Forestry 16, no. 3 (August 1, 1992): 146–50. http://dx.doi.org/10.1093/sjaf/16.3.146.
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Abstract Nine-year-old planted sweetgum (Liquidambar styraciflua L.) consisting of four half-sib seed sources were refertilized with nitrogen in 1981 at the beginning of the tenth field-growing season. Increases in periodic annual height, diameter at breast height, basal area, stem volume (ob),and woody biomass increments of all four half-sib seed sources from applied nitrogen were observed during the 9 years following application. Periodic annual stem volume (ob) increments averaged over all half-sib seed sources were 120, 152, 192, and 266 ft³/ac/yr for the 0, 89, 178, and356 lb/ac N rates, respectively. The half-sib seed sources from alluvial sites were superior to those from upland sites in terms of productivity and response to N. The response of all half-sibs to N was immediate, occurring during the year of application; however, the increased growth ratesdue to N persisted for only 3 years. This suggests that on responsive sites, applications of N may be necessary every fourth year to maintain maximum growth rates. South. J. Appl. For. 16(3):146-150.
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Lodge, G. M. "Effects of cutting and grazing on newly sown plants of Phalaris aquatica cv. Sirosa at Tamworth, New South Wales." Australian Journal of Experimental Agriculture 47, no. 11 (2007): 1351. http://dx.doi.org/10.1071/ea06268.
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A field study was conducted (1994–97) to investigate defoliation time and frequency effects on a newly sown stand of phalaris (Phalaris aquatica cv. Sirosa). Defoliation treatments were applied from spring 1994 to autumn 1995 and effects on plant frequency and basal cover monitored until June 1997. The experimental design was a randomised split-plot in three replicates, with 45 main plots and 90 subplots. Main plots included three types of defoliation (two cutting heights or grazing with Merino sheep) applied at four different times (early stem elongation, anthesis, end of summer and end of autumn) and an undefoliated control. The main plots were divided into two subplots for frequency of defoliation (once only or cut every 8 weeks). In September 1995, none of the treatments had a significant effect on plant frequency, basal cover, green tiller weight and weight of individual tillers. However, there were significant (P < 0.05) effects of defoliation type on green tiller number, defoliation time on basal bud weight and water soluble carbohydrates and defoliation type and frequency on basal bud water soluble carbohydrates. In February and April 1996, there were significant effects of defoliation time on green tiller number and weight, basal bud weight and water soluble carbohydrates. In 1996, Sirosa phalaris plant frequency and basal cover values were generally higher (P < 0.05) in the undefoliated control compared with those defoliated at early stem elongation. However, despite fertiliser application and moderate grazing, Sirosa phalaris plant frequency had declined to a mean of 23.6% by February 1997 and to <10% by June 1997.
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Węgrzynowicz-Lesiak, Elżbieta, Marian Saniewski, Justyna Góraj, Marcin Horbowicz, Kensuke Miyamoto, and Junichi Ueda. "Effects of sugars on the growth and chlorophyll content in excised tulip stem in the presence of Indole-3-acetic acid." Journal of Fruit and Ornamental Plant Research 20, no. 1 (October 1, 2012): 97–114. http://dx.doi.org/10.2478/v10290-012-0008-6.
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ABSTRACT The purpose of this study was to clarify the effect of sucrose on auxin-induced growth of stem excised from growing tulips and excised directly from cooled and not cooled bulbs, and on the growth of excised IV internode from growing plants in the presence of auxin. In all cases flower bud was replaced by IAA (indole-3- acetic acid, 0.1%, w/w in lanolin) and basal part of excised segments of stem was kept in distilled water or in solution of various sugars at different concentrations. IAA-induced growth of excised stems isolated from growing tulips was inhibited by sucrose at concentrations of 5.0% and 10.0%, but sucrose at 1.25% and 2.5% did not. Sucrose at all concentrations used evidently delayed senescence and increased chlorophyll contents in excised stems in the presence of IAA. Sucrose induced stiffing in isolated stems in the presence of IAA, and much less infective by pathogen in comparison to stem treated with IAA only. Mannitol and sorbitol at concentrations of 5.0% and 10.0% substantially inhibited IAA-induced growth of stem segments. Stem segments excised from cooled and not cooled tulip bulbs were more sensitive than those isolated from growing shoots due to application of sucrose and glucose; more inhibitory effect was observed. Sucrose at concentrations of 5.0% and 10.0% only slightly inhibited growth of IV internode treated with IAA and all concentrations of sucrose (1.25%, 2.5%, 5.0% and 10.0%) substantially increased chlorophyll content. The possible mode of actions of sucrose interacting with auxin to regulate stem growth is also discussed although sugar response is complicated by the fact that plants have multiple sugar-response pathways.
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Prince, Candice M., Kaitlyn H. Quincy, Stephen F. Enloe, Jennifer Possley, and James Leary. "Cut-stem treatments using graminicides for burmareed (Neyraudia reynaudiana) invasions in Pine Rocklands, South Florida, USA." Invasive Plant Science and Management 12, no. 4 (December 2019): 236–41. http://dx.doi.org/10.1017/inp.2019.30.
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AbstractBurmareed [Neyraudia reynaudiana (Kunth) Keng ex Hitchc.] is an aggressive invader of pine rockland communities in south Florida. Currently, it is managed by clipping the stems and later returning, when plants have regrown to approximately 50 cm in height, to administer applications of glyphosate to new foliar growth (a “cut–return–treat,” or CRT, strategy). This multi-visit strategy is time-consuming and may result in off-target effects due to the broad-spectrum nature of glyphosate. With this study we evaluated a cut-stem (CS) approach, in which stems are cut and immediately treated with herbicide. Further, we tested the efficacy of the selective graminicides sethoxydim and fluazifop-P-butyl. In a pot study, CS treatments included: glyphosate (239.7 g ae L−1) in water, sethoxydim (9.0 g ai L−1) or fluazifop-P-butyl (12.1 g ai L−1) in either basal oil or water, and triclopyr (47.9 g ae L−1) in basal oil. All CS treatments provided mortality and growth reduction comparable to the best CRT treatments (glyphosate, sethoxydim, and fluazifop-P-butyl) and were therefore evaluated under field conditions using the same application rates. Mortality was low in the field (≤30%) regardless of herbicide treatment. Overall, fluazifop-P-butyl provided greater control than sethoxydim, resulting in 71% and 94% relative growth reduction in total shoot length with oil and water carriers, respectively, compared with 50% and 43% reduction for sethoxydim. Fluazifop also provided control similar to triclopyr and glyphosate (≥65% reduction in total shoot length). Results suggest that CS treatments may be a viable strategy for managing N. reynaudiana and reducing management costs. However, more research is needed to optimize rates. Further, fluazifop-P-butyl allows for a more selective option than glyphosate that may decrease off-target effects on native understory vegetation in pine rocklands.
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Rezaie, Fahimeh, and Madjid Momeni-Moghaddam. "Skin Stem Cells; Definition, Function, Importance and Methods of Isolation." Journal of Genes and Cells 3 (July 15, 2017): 47. http://dx.doi.org/10.15562/gnc.56.
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Stem cells (SCs) are a population of undifferentiated cells with high self-renewing and differentiation potency. On the basis of origin, SCs are divided into four main groups: embryonic stem cells (ESCs), fetal stem cells (FSCs), induced pluripotent stem cells (iPSCs), and adult stem cells (ASCs). Interestingly, in different literatures, ASCs are considered as unipotent progenitor cells, multipotent stem cells or even pluripotent stem cells with variety of differentiation potential. ASCs reside in many adult tissues such as liver, bone marrow, adipose tissue, neural tissues, skin and etc. Among adult tissues, skin is considered as a fast self-renewing tissue which is capable to reconstruct itself during skin homeostasis and injuries. In fact, skin is mentioned as a pool of different types of SCs including keratinocyte stem cells (KSCs), hair follicle stem cells (HFSCs) and sebaceous gland stem cells (SGSCs). During skin regeneration, cooperation between these stem cells is essential for reconstruction of skin. Among these SCs, KSCs are most common cells in epidermis layer (mostly in basal layer) which are the important population of SCs for regeneration of epidermis. Herein, we reviewed different methods for skin stem cells isolation and characterization, and their potential for clinical application.
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Lynch, Thomas B., and Jeffrey H. Gove. "An antithetic variate to facilitate upper-stem height measurements for critical height sampling with importance sampling." Canadian Journal of Forest Research 43, no. 12 (December 2013): 1151–61. http://dx.doi.org/10.1139/cjfr-2013-0279.
Full textAbstract:
Critical height sampling (CHS) estimates cubic volume per unit area by multiplying the sum of critical heights measured on trees tallied in a horizontal point sample (HPS) by the HPS basal area factor. One of the barriers to practical application of CHS is the fact that trees near the field location of the point-sampling sample point have critical heights that occur quite high on the stem, making them difficult to view from the sample point. To surmount this difficulty, use of the “antithetic variate” associated with the critical height together with importance sampling from the cylindrical shells integral is proposed. This antithetic variate will be u = (1 − b/B), where b is the cross-sectional area at “borderline” condition and B is the tree’s basal area. The cross-sectional area at borderline condition b can be determined with knowledge of the HPS gauge angle by measuring the distance to the sample tree. When the antithetic variate u is used in importance sampling, the upper-stem measurement will be low on tree stems close to the sample point and high on tree stems distant from the sample point, enhancing visibility and ease of measurement from the sample point. Computer simulations compared HPS, CHS, CHS with importance sampling (ICHS), ICHS and an antithetic variate (AICHS), and CHS with paired antithetic varariates (PAICHS) and found that HPS, ICHS, AICHS, and PAICHS were very nearly equally precise and were more precise than CHS. These results are favorable to AICHS, since it should require less time than either PAICHS or ICHS and is not subject to individual-tree volume equation bias.
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López C., Lina María, Mariam Vásquez M., Héctor Lancheros R., and Stanislav Magnitskiy. "Vegetative propagation of native fruit species of páramo Thibaudia floribunda and Cavendishia bracteata by cuttings." Agronomía Colombiana 35, no. 1 (January 1, 2017): 12–22. http://dx.doi.org/10.15446/agron.colomb.v35n1.61796.
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Cavendishia bracteata and Thibaudia floribunda (Ericaceae) are wild fruit shrubs native to the Andes region. This study aimed to characterize the rooting potential of basal and apical cuttings using naphthalene acetic acid (NAA) in different concentrations (0, 200, 500, or 1,000 mg L-1). In C. bracteata, the cutting position on the branch affected its sprouting and rooting, with apical cuttings presenting the best performance with auxin application. The rooting of cuttings was more successful in C. bracteata than in T. floribunda. NAA applications between 200 to 500 mg L-1 were more suitable for the propagation of C. bracteata due to the higher percentages of rooting and shoot production. For propagation of T. floribunda, the use of apical cuttings without the application of auxins is recommended. Adventitious roots in cuttings of both species were originated from parenchyma cells of the stem.
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Neto, Sebastião Elviro de Araújo, Dheimy Da Silva Novelli, Gabriela Da Silva Tamwing, Nilciléia Mendes Da Silva, and Luis Gustavo De Souza E Souza. "Propagation of yellow mombin by stem and root cuttings treated with indolebutyric acid." Comunicata Scientiae 10, no. 4 (December 31, 2019): 448–53. http://dx.doi.org/10.14295/cs.v10i4.3213.
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Yellow mombin is a fruit species of growing interest in the agro-industrial sector, mainly in the North and Northeast regions of Brazil, although its commercial exploitation is still limited due to the lack of information regarding its propagation, among other factors. In this perspective, this work aimed to study the effect of the application of indolebutyric acid (IBA) in the vegetative propagation of yellow mombin by stem and root cuttings. The experiments were conducted in a plant nursery, under a completely randomized experimental design consisting of six concentrations of IBA (0, 1000, 2000, 3000, 4000 and 5000 mg.kg-1 in industrial talc), four replications, and ten cuttings per plot. The stem cutting experiment also evaluated the effect of the types of cuttings (tanchan, basal, stratified basal, medial, and apical), with the material being collected from a yellow mombin tree in full vegetative growth. The root cuttings were collected from a matrix plant in the stage of vegetative rest and cut into 15 cm length segments. After 120 days, the following variables were evaluated: percentage of living, sprouted, rooted, and calloused cuttings, and dry mass of roots and sprouts. The cuttings of the tanchan type showed higher survival and sprouting percentages, regardless of the concentration of IBA applied, whereas the rooting rate was low. The application of IBA increased the rooting percentage of the root cuttings until the maximum concentration of 5000 mg.kg-1, reaching 77.5%, although it did not influence the other variables analyzed. The root cuttings of yellow mombin exhibit good regeneration capacity.
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Zhang, Yuxue, Shengnan Su, Mirko Tabori, Junjie Yu, Denise Chabot, Bahram Baninasab, Xuelian Wang, Bao-Luo Ma, Chunyan Li, and Shahrokh Khanizadeh. "Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario." Journal of Agricultural Science 9, no. 12 (November 15, 2017): 30. http://dx.doi.org/10.5539/jas.v9n12p30.
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Lodging is an important limiting factor in wheat because it affects growth, yield and grain quality. Plant growth regulators (PGRs) are often used to restrain elongation of internodes, improve lodging traits, and protect yield potentials. An experiment was set up in the greenhouse at the Ottawa Research and Development Centre (ORDC) to study the effect of the selected PGRs (Manipulator, the active ingredient of which is chlormequat; and Palisade, the active ingredient of which is trinexapac-ethyl) on yield, stem height and morphological traits in six spring wheat cultivars (AC Carberry, AAC Scotia, Hoffman, Fuzion, FL62R1, and AW725). Both PGRs reduced plant height and caused a 6% to 48% reduction in the length of the second basal internode. The mixture of the two PGRs had a synergistic affect and made the stem shorter. The application of PGRs significantly reduced lodging, increased stem diameter, thickness, filling degree, and stem strength, and increased leaf relative chlorophyll content. However, application of PGRs significantly reduced grain yield, and the combination of the two PGRs (Manipulator and Palisade) had a synergistic effect and lowered the yield. In general, the effect of Palisade was more evident than that of Manipulator.
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Ahmadi, Kourosh, Bahareh Kalantar, Vahideh Saeidi, Elaheh K. G. Harandi, Saeid Janizadeh, and Naonori Ueda. "Comparison of Machine Learning Methods for Mapping the Stand Characteristics of Temperate Forests Using Multi-Spectral Sentinel-2 Data." Remote Sensing 12, no. 18 (September 16, 2020): 3019. http://dx.doi.org/10.3390/rs12183019.
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The estimation and mapping of forest stand characteristics are vital because this information is necessary for sustainable forest management. The present study considers the use of a Bayesian additive regression trees (BART) algorithm as a non-parametric classifier using Sentinel-2A data and topographic variables to estimate the forest stand characteristics, namely the basal area (m2/ha), stem volume (m3/ha), and stem density (number/ha). These results were compared with those of three other popular machine learning (ML) algorithms, such as generalised linear model (GLM), K-nearest neighbours (KNN), and support vector machine (SVM). A feature selection was done on 28 variables including the multi-spectral bands on Sentinel-2 satellite, related vegetation indices, and ancillary data (elevation, slope, and topographic solar-radiation index derived from digital elevation model (DEM)) and then the most insignificant variables were removed from the datasets by recursive feature elimination (RFE). The study area was a mountainous forest with high biodiversity and an elevation gradient from 26 to 1636 m. An inventory dataset of 1200 sample plots was provided for training and testing the algorithms, and the predictors were fed into the ML models to compute and predict the forest stand characteristics. The accuracies and certainties of the ML models were assessed by their root mean square error (RMSE), mean absolute error (MAE), and R-squared (R2) values. The results demonstrated that BART generated the best basal area and stem volume predictions, followed by GLM, SVM, and KNN. The best RMSE values for both basal area (8.12 m2/ha) and stem volume (29.28 m3/ha) estimation were obtained by BART. Thus, the ability of the BART model for forestry application was established. On the other hand, KNN exhibited the highest RMSE values for all stand variable predictions, thereby exhibiting the least accuracy for this specific application. Moreover, the effectiveness of the narrow Sentinel-2 bands around the red edge and elevation was highlighted for predicting the forest stand characteristics. Therefore, we concluded that the combination of the Sentinel-2 products and topographic variables derived from the PALSAR data used in this study improved the estimation of the forest attributes in temperate forests.
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Hopkins, Kaitlin A., Michael A. Arnold, Charles R. Hall, Brent Pemberton, and Marco A. Palma. "Vegetative Propagation of Ratibida columnifera (Nutt.) Wooton & Standl." HortScience 57, no. 7 (July 2022): 831–35. http://dx.doi.org/10.21273/hortsci16483-22.
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Variation in floral characteristics and growth habits within the native range of the North American wildflower Ratibida columnifera (Nutt.) Wooton & Standl. suggest potential for breeding and selection efforts to develop improved cultivars for commercial and residential landscapes. Toward that end, experiments in vegetative propagation were performed to enable perpetuation of unique germplasm. Stem development stage, applications of auxin, genotypic variation, and the effects of bottom heat applications were assessed to determine impacts on rooting percentages and adventitious root system quality measures. Younger apical stem sections rooted more readily and produced better quality root systems than more lignified basal stem cuttings. Optimal rooting percentages and rooted cutting quality ranged from 0.10% to 0.30% IBA (indole-3-butyric acid) quick dips, with 0.30% being optimal for most genotypes. Application of 26 °C bottom heat improved rooting ability in both cool and warm seasons compared with ambient and bottom heat of 32 °C. Bottom heat of 32 °C improved most rooting measures over ambient during the cool season, but not during the warm season. The degree of improvement in adventitious rooting associated with various developmental stage, auxin quick dips, and bottom heating varied among accessions of R. columnifera, suggesting that adventitious rooting characteristics should be evaluated as a selection criterion for cultivar development within this species.
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Brandeis, Thomas J., Michael Newton, and Elizabeth C. Cole. "Underplanted conifer seedling survival and growth in thinned Douglas-fir stands." Canadian Journal of Forest Research 31, no. 2 (February 1, 2001): 302–12. http://dx.doi.org/10.1139/x00-174.
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In a multilevel study to determine limits to underplanted conifer seedling growth, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), grand fir (Abies grandis (Dougl. ex D. Don) Lindl.), western redcedar (Thuja plicata Donn ex D. Don), and western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings were planted beneath second-growth Douglas-fir stands that had been thinned to basal areas ranging from 16 to 31 m2/ha. Understory vegetation was treated with a broadcast herbicide application prior to thinning, a directed release herbicide application 2 years later, or no treatment beyond harvest disturbance. Residual overstory density was negatively correlated with percent survival for all four species. Broadcast herbicide application improved survival of grand fir and western hemlock. Western redcedar, grand fir, and western hemlock stem volumes were inversely related to overstory tree density, and this effect increased over time. There was a strong indication that this was also the case for Douglas-fir. Reduction of competing understory vegetation resulted in larger fourth-year stem volumes in grand fir and western hemlock.
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Huang, Kai, Yu Wu, YunQing Xie, LiYing Huang, and Hong Liu. "Analyzing mRNAsi-Related Genes Identifies Novel Prognostic Markers and Potential Drug Combination for Patients with Basal Breast Cancer." Disease Markers 2021 (October 4, 2021): 1–15. http://dx.doi.org/10.1155/2021/4731349.
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Basal breast cancer subtype is the worst prognosis subtypes among all breast cancer subtypes. Recently, a new tumor stemness index-mRNAsi is found to be able to measure the degree of oncogenic differentiation of tissues. The mRNAsi involved in a variety of cancer processes is derived from the innovative application of one-class logistic regression (OCLR) machine learning algorithm to the whole genome expression of various stem cells and tumor cells. However, it is largely unknown about mRNAsi in basal breast cancer. Here, we find that basal breast cancer carries the highest mRNAsi among all four subtypes of breast cancer, especially 385 mRNAsi-related genes are positively related to the high mRNAsi value in basal breast cancer. This high mRNAsi is also closely related to active cell cycle, DNA replication, and metabolic reprogramming in basal breast cancer. Intriguingly, in the 385 genes, TRIM59, SEPT3, RAD51AP1, and EXO1 can act as independent protective prognostic factors, but CTSF and ABHD4B can serve as independent bad prognostic factors in patients with basal breast cancer. Remarkably, we establish a robust prognostic model containing the 6 mRNAsi-related genes that can effectively predict the survival rate of patients with the basal breast cancer subtype. Finally, the drug sensitivity analysis reveals that some drug combinations may be effectively against basal breast cancer via targeting the mRNAsi-related genes. Taken together, our study not only identifies novel prognostic biomarkers for basal breast cancers but also provides the drug sensitivity data by establishing an mRNAsi-related prognostic model.
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Kirby, E. J. M., M. Appleyard, and N. A. Simpson. "Co-ordination of stem elongation and Zadoks growth stages with leaf emergence in wheat and barley." Journal of Agricultural Science 122, no. 1 (February 1994): 21–29. http://dx.doi.org/10.1017/s0021859600065746.
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SUMMARYLeaf emergence, apex development stage, internode length and Zadoks principal growth stage 3 were measured over 3 years at several sites.Internode elongation and Zadoks score were strongly related to the number of emerged culm leaves. The final length of the most basal internode was very variable and contributed to variation in the relationship between Zadoks stage 30 and the number of emerged culm leaves. Variation in the length of the basal internode was related to the final number of culm leaves. Most plants had six culm leaves but the number of leaves was affected by sowing date. In an experiment where sowings were made from September to March, stem elongation and Zadoks stage 30 started at a later stage of apex development in later sowings.Recognition and prediction of culm elongation and number of emerged culm leaves is important for the application of growth regulator and fungicides. Combined with functions to predict the rate of leaf emergence and final number of leaves, the relationships described in this paper may enable Zadoks principal growth stage 3 and number of emerged culm leaves to be predicted.
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Ganyo, Komla, Bertrand Muller, Malick Ndiaye, Espoir Gaglo, Aliou Guissé, and Myriam Adam. "Defining Fertilization Strategies for Sorghum (Sorghum bicolor (L.) Moench) Production Under Sudano-Sahelian Conditions: Options for Late Basal Fertilizer Application." Agronomy 9, no. 11 (October 30, 2019): 697. http://dx.doi.org/10.3390/agronomy9110697.
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Soil nutrient deficiency and rainfall variability impair the production of sorghum (Sorghum bicolor (L). Moench) in Sudano-Sahelian zone. The aim is to study the environmental factors that can determine the effect of fertilizer application on sorghum grain yield and to formulate tailored fertilization strategies according to sorghum varieties (hybrid and open pollinated improved varieties) and environmental context. Field experiments were conducted during the 2015 and 2016 growing seasons in Nioro du Rip and in Sinthiou Malème (Senegal). In a randomized complete block design arranged in a split-plot with four replications, three factors were tested: sorghum genotype (G: Fadda, Faourou, Soumalemba and Soumba with different cycle lengths), environment (E: irrigation and rainfed, different soil types and fertility levels), and fertilization management (M: five different combinations of application dose and application time) including T1 = no fertilizer applied; T2 (recommended practice, 100%) = 150 kg/ha of NPK (15-15-15) at emergence + 50 Kg/ha of urea (46%) at tillering + 50 kg/ha of urea at stem extension; T3 = 50% T2; T4 (100% delay) = 150 kg/ha of NPK +50 kg/ha of urea at stem extension +50 kg/ha of urea at heading ; T5 = 50% T4. Results showed that: (i) in most environments, stressed plants under late application treatments (T4 and T5) recovered biomass once the fertilizer was applied (ii); grain yield with T5 was higher than with T4 under well-watered conditions (sufficient and well distributed rainfall and eventual complementary irrigations) ; (iii) Fadda, a hybrid, responded differently to fertilization than the other varieties only for biomass production, (iv) late fertilizer application treatment (T4) gave higher grain yield than the recommended practice (T2) in the environment with low yield potential, and (v) long cycle duration genotypes benefited better from late fertilization compared to short cycle duration genotypes. This study showed that under Sudano-Sahelian conditions late fertilization of sorghum can be beneficial to grain yield if the rainy season has a slow start, depending on sorghum genotypes (i.e., cycle length), and on the initial N content of the soil.
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Van Ngo, Vinh, Mike Hernandez, Bill Roth, and David C. Joy. "STEM Imaging of Lattice Fringes and beyond in a UHR In-Lens Field-Emission SEM." Microscopy Today 15, no. 2 (March 2007): 12–17. http://dx.doi.org/10.1017/s1551929500050951.
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The phase-contrast imaging of atomic lattices has now become commonplace for both Transmission Electron Microscopes (TEM) and Scanning Transmission Electron Microscopes (STEMs). Recently, however, bright-field STEM images of multi-wall carbon nanotubes (MWCNTs) recorded from an ultra-high resolution (UHR) in-lens field-emission scanning electron microscope (FE-SEM) operating at 30keV have also demonstrated lattice fringe resolution. One example of such an image containing multiple examples of fringe detail is shown in figure 1. The carbon lattice fringes were analyzed and their origin confirmed by the application of the FFT algorithms in the SMART image analysis program. The resulting power spectrum after thresholding to remove background noise (Figure 2) confirms that phase detail in the image extends down to about 5 Angstroms (0.5nm) and that well defined diffraction spots corresponding to a spacing of 3.4 Angstroms (0.34nm) generated by the (002) basal plane spacing of the graphite lattice are present.
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Vassanthini Ratnarajah, Niroash Gnanachelvam, Brintha Karunarathna, and Sasikaran Vettivel. "Effect of foliar spray of Amirthakaraisal on okra (Abelmoschus esculentus) cultivation." World Journal of Advanced Research and Reviews 15, no. 2 (August 30, 2022): 268–74. http://dx.doi.org/10.30574/wjarr.2022.15.2.0804.
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An experiment was carried out to study the performance of different concentrations of Amirthakaraisal, a foliar spray, on okra (Abelmoschus esculentus) development and yield. The conducted experiment followed a Completely Randomized Design (CRD) with the following treatments; T1 - Full recommended fertilizer, T2 - Compost 10 ton/ha, T3 - 5 ton/ha compost as basal and 5 ton/ha compost as topdressing, and 5 ton/ha compost as basal and 5 ton/ha compost as topdressing with 1% (T4), 3% (T5), 5% (T6) Amirthakaraisal as a foliar spray at 1st, 3rd and 5th week after planting. The results showed that there were significant differences (P<0.05) in plant height, number of leaves per plant, number of pods per plant, and dry weights of leaf, stem, and root. However, there were no significant differences (P>0.05) in the fresh weight and dry weight of pods among the tested treatments. The study suggests that foliar application of Amirthakaraisal at a 5% level compared to 1% and 3% application is effective in improving okra plant growth.
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Liu, Yi-Ming, Fang Zheng, Zhao-Hui Liu, Hai-Bo Lan, Ye-Hong Cui, Tong-Guo Gao, Marja Roitto, and Ai-Fang Wang. "Enhanced Root and Stem Growth and Physiological Changes in Pinus bungeana Zucc. Seedlings by Microbial Inoculant Application." Forests 13, no. 11 (November 4, 2022): 1836. http://dx.doi.org/10.3390/f13111836.
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Background and Objectives: As an extensively used tree species in landscaping and afforestation in China, lacebark pine (Pinus bungeana Zucc.) seedlings are in high demand. However, the small number of fine roots and the low growth rate of lacebark pine seedlings increase the risks encountered during transplant and extend the nursery time for outplanting. We aimed to find out whether a microbial inoculant would promote root growth and accordingly, shorten the nursery cultivation time. Materials and Methods: One-year-old lacebark pine seedlings were treated with the inoculant Bacillus subtilis 8–32 six times from June to September. At each application time, five treatments of undiluted microbial inoculants (UM), 30 times diluted microbial inoculants (30 DM), 40 times diluted microbial inoculants (40 DM), 50 times diluted microbial inoculants (50 DM), and distilled water as a control (CTRL) were administered to the seedlings. In the end, all the seedlings were harvested to measure the root growth, aboveground growth, and the physiological indices. Results: Root and stem growth was enhanced by the inoculants in terms of the increased number of root tips, the length and surface area of the roots, the biomass of the roots and stems, as well as the increase in height and basal stem diameter. The chlorophyll a/b of the needles was increased, in spite of the fact that the total chlorophyll content was decreased by the microbial inoculant treatments at the end of the growth phase. Meanwhile, the maximum photochemical efficiency (Fv/Fm) of the needles was increased by the inoculant treatments. The soluble sugar content was additionally translocated into the stems in the UM treatment, suggesting the change in carbon allocation. The content of available potassium, phosphorus, and ammonium nitrogen in the potting soil was increased in the 30 DM group, and the content of soil organic matter was increased in all the inoculant treatments. Conclusions: The microbial inoculant Bacillus subtilis 8–32, in appropriate concentrations, could be applied to promote root and shoot growth and improve the seedling quality of the lacebark pine during cultivation.
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Surija, Supeno, and Michelle Faustine. "Basal Stem Rot Disease Eradication and Improving Production with Ganoderma Vaccine/Biofungicide CHIPS in Flooded Area of Oil Palm Plantation." European Journal of Agriculture and Food Sciences 3, no. 3 (June 30, 2021): 101–9. http://dx.doi.org/10.24018/ejfood.2021.3.3.323.
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Ganoderma has always been the main cause of basal stem rot (BSR) in many countries including Indonesia. Many approaches have been made, such as physical, chemical, and biology approaches using endophytic microorganisms. This study uses Ganoderma vaccine/ Biofungicide CHIPS to control Ganoderma and MOAF fertilizer as a nutrition source in oil palms that are severely infected by Ganoderma. Experiment is conducted in an oil palm plantation at Kecamatan Bilah Hilir, Kabupaten Labuhan Batu, Sumatera Utara, Indonesia. This plantation is a sandy mineral soil, which is a former swamp area. Because of the low contour of the land, the areas are often inundated by floods for more than 1 month from the end of the year to the beginning of the year. This study aims to eradicate basal stem rot (BSR) disease in the areas. Because of the flooded area, the soil is quite damp and equal dispersion of Ganoderma spores occurs massively throughout the whole area. We conducted the study for 4 years (2017 to 2020), using Ganoderma vaccine/Biofungicide CHIPS in 3 blocks: D4, D5, and C3 as study area and block C6 as control block (without CHIPS). Results of this study showed the productivity reached 79,12 to 94,02% of the PPKS (Indonesia Oil Palm Research Centre) standard production. Although in unfavorable environmental conditions, these numbers show a very satisfying result as it compensates for healthy normal oil palm production, while experiment blocks using inorganic fungicides and Trichoderma, the productivity decreased from year to year. The combined application of Organic fertilizer MOAF for nutrient sources with Ganoderma vaccine /Biofungicide CHIPS is very effective against the spread of basal stem rot (BSR) diseases in oil palms even in unfavorable environments as in flooded areas.
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Leitch, M. H., and J. D. Hayes. "Effects of chlormequat application on stem characteristics, yield and panicle conformation of winter oats." Journal of Agricultural Science 113, no. 1 (August 1989): 17–26. http://dx.doi.org/10.1017/s0021859600084562.
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SUMMARYThe responses to treatment with chlormequat of winter oats at various rates of applied N were investigated in field experiments over two seasons. Chlormequat, applied at crop growth stage (GS) 32, significantly reduced stem length by an overall average of 25·3% in 1985/86 and 27·4% in 1986/87. The percentage reduction was not significantly influenced by variety or by the rate of N applied. All intcrnodes apart from the basal one were significantly shortened. The third internode from the base showed the largest percentage reduction and the uppermost internode the largest actual reduction in length, in all three varieties. Stem shortening was always associated with an increase in the weight per unit length of stem. In 1985/86 lodging in untreated control plots became more severe as N rate increased, but was completely controlled by the application of chlormequat at all but the highest rate (150 kg N/ha).Combine-harvested grain yields of the variety Pennal in 1985/86 and of Bulwark and Pcnnal in 1986/87 were reduced where chlormequat had been applied. Hand-harvested samples from these treatments did not show the same reductions in yield, but revealed a significant increase in the number of grains per panicle and a significant reduction in their mean individual weight. The grain characteristics of Peniarth were unaffected.The lengths of the main-stem panicles and primary branches in the panicle were shortened as a result of chlormequat application. In addition, the degree of branching and the number of spikelets were increased in the lower third of the panicle but reduced in the upper two thirds. In both Bulwark and Pennal the numbers of sterile grains were increased by the application of chlormequat and, in Bulwark only, the number of fertile grains was reduced. In Peniarth the numbers of fertile and sterile grains were unaffected.
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Schwab, Jacob D., Kimberly A. Williams, and Jason J. Griffin. "Asexual Propagation by Stem Cuttings of Half-high and Low-bush Blueberries in Soilless Substrates." Journal of Environmental Horticulture 39, no. 2 (June 1, 2021): 47–52. http://dx.doi.org/10.24266/0738-2898-39.2.47.
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Abstract Two experiments evaluated rooting of blueberry in substrates for use in soilless production systems. Apical and basal semi-hardwood stem cuttings of Vaccinium corymbosum x angustifolium ‘Northland' were rooted in rockwool cubes, shredded rockwool, or 3 perlite:1 sphagnum peat moss (v/v). Cuttings were treated with 0.1% indolebutyric acid (IBA) in 1:1 95% ethyl alcohol: water, 0.1% potassium salt of indolebutyric acid (K-IBA), 1:1 95% ethyl alcohol: water, or water. In Expt. 2, basal stem cuttings of ‘Northland' and V. angustifolium ‘Brunswick' were rooted in the same substrates with the addition of coco coir, treated with 1,000 ppm K-IBA, then fertilized weekly (after rooting began) with water, 75 ppm N from 16-4-17 fertilizer or 4-18-38 and Ca(NO3)2 plus MgSO4 fertilizer, all adjusted to pH 4.0. Rooting percentages were calculated, and rooting quality was assessed using a 6-point visual scale. ‘Northland' roots well (>80%) in peat:perlite and coco coir substrates and acceptably in two rockwool substrates (∼50%). ‘Brunswick' rooted acceptably in peat:perlite and coco coir (27% and 41%, respectively), and very poorly in two rockwool substrates (<2%). Rooting of ‘Northland' was not improved with application of 0.1% auxin. Apical cuttings of ‘Northland' had a higher rooting success than basal stem cuttings. Weekly fertilization did not improve root ratings, and had minimal effect on rooting success. Index words: adventitious rooting, auxin, coco coir, hydroponics, indolebutyric acid, rockwool, Vaccinium. Species used: ‘Northland' half-highbush blueberry, Vaccinium corymbosum L. X angustifolium Aiton, ‘Brunswick' low-bush blueberry, V. angustifolium Aiton. Chemicals used: auxin, potassium salt indolebutyric acid, K-IBA; Sigma-Aldrich, St. Louis, MO, USA, auxin, indolebutyric acid, IBA; Sigma-Aldrich, St. Louis, MO, USA, Oasis® 16-4-17 fertilizer, OASIS® Grower Solutions, Kent, OH, USA, ChemGro 4-18-38 fertilizer, ChemGro Hydro-Gardens, Colorado Springs, CO, USA, Ca(NO3)2, Yara North America, Tampa, FL, USA, and MgSO4, PQ Corp., Valley Forge, PA, USA.
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Aminuddin, Nurul Issttifa, Raihana Edros, and Rajaletchumy Veloo Kutty. "REVIEW ON POTENTIAL TARGETED THERAPY FOR TRIPLE NEGATIVE BREAST CANCER." Journal of Chemical Engineering and Industrial Biotechnology 5, no. 2 (April 8, 2020): 55–60. http://dx.doi.org/10.15282/jceib.v5i2.3686.
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Triple negative breast cancer (TNBC) is a very aggressive type of cancer. TNBC is not just a single type of disease to be cured, but it consists of 6 subtypes which are basal-like 1 and 2, immunomodulatory, mesenchymal, mesenchymal stem- like and luminar androgen receptor. These subtypes has diverse characteristics, which hold potential opportunity for targeted treatment. Lack of molecular targets for triple negative tumor lead to limited targeted therapies for TNBC. Therefore, effective targeted therapies are urgently needed for TNBC. This paper will highlight on the potential targets in TNBC and treatment options that are currently under clinical application.
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Mustafa, Isshadiba Faikah, Mohd Zobir Hussein, Abu Seman Idris, Nur Hailini Zainol Hilmi, and Sharida Fakurazi. "Hexaconazole-Micelle Nanodelivery System Prepared Using Different Surfactants for Ganoderma Antifungal Application." Molecules 26, no. 19 (September 26, 2021): 5837. http://dx.doi.org/10.3390/molecules26195837.
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Reports on fungicide-based agronanochemicals in combating disastrous basal stem rot disease in the oil palm industry are scant. Herein, we describe the potential of fungicide nanodelivery agents based on hexaconazole-micelle systems produced using three different surfactants; sodium dodecylbenze sulfonate (SDBS), sodium dodecyl sulfate (SDS) and Tween 80 (T80). The resulting nanodelivery systems were characterized and the results supported the encapsulation of the fungicide into the micelles of the surfactants. We have investigated in detail the size-dependent effects of the as-synthesized micelles towards the inhibition growth of Ganoderma Boninense fungi. All the nanodelivery systems indicate that their size decreased as the surfactant concentration was increased, and it directly affects the fungal inhibition. It was also found that Tween 80, a non-ionic surfactant gave the lowest effective concentration, the EC50 value of 2, on the pathogenic fungus Ganoderma boninense compared to the other anionic surfactants; SDBS and SDS. This study opens up a new generation of agronanofungicide of better efficacy for Ganoderma disease treatment.
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Borovička, Adam. "Algorithmic Improvements of the KSU-STEM Method Verified on a Fund Portfolio Selection." Information 11, no. 5 (May 12, 2020): 262. http://dx.doi.org/10.3390/info11050262.
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The topic of this article is inspired by the problem faced by many people around the world: investment portfolio selection. Apart from the standardly used methods and approaches, non-traditional multiple objective programming methods can also be significant, providing even more efficient support for making a satisfactory investment decision. A more suitable method for this purpose seems to be a concept working with an interactive procedure through the portfolio that may gradually be adapted to the investor’s preferences. Such a method is clearly the Step Method (STEM) or the more suitable improved version KSU-STEM. This method is still burdened by partial algorithmic weaknesses or methodical aspects to think about, but not as much as the other methods. The potentially stronger application power of the KSU-STEM concept motivates its revision. Firstly, an unnecessarily negative principle to determine the basal value of the objectives is revised. Further, the fuzzy goals are specified, which leads to a reformulation of the revealed defuzzified multi-objective model. Finally, the imperfect re-setting of the weights (importance) of unsatisfactory objectives is revealed. Thus, the alternative approaches are proposed. The interventions to the algorithm are empirically verified through a real-life selection of a portfolio of the open unit trusts offered by CONSEQ Investment Management traded on the Czech capital market. This application confirms a significant supporting power of the revised multiple objective programming approach KSU-STEM in a portfolio-making process.