Academic literature on the topic 'Gibberellic acid 18'
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Journal articles on the topic "Gibberellic acid 18"
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Tavakoli, Khadige, Alireza Razavi, and Alireza Sohani. "Effects of different temperatures and hormone treatments on breaking dormancy in potato tubers." Journal of Agricultural Sciences, Belgrade 59, no. 3 (2014): 255–64. http://dx.doi.org/10.2298/jas1403255t.
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Mini propagation is a new method to produce potato. A factorial experiment based on completely randomized block design with three replications was conducted to investigate the effect of two temperature levels (18 and 25?C) and six hormone treatments (H1: 0% of ethanol + 0 mg/l of gibberellic acid, H2: 0% of ethanol + 10 mg/l of gibberellic acid, H3: 0.5% of ethanol + 0 mg/l of gibberellic acid, H4: 0.5% of ethanol + 10 mg/l of gibberellic acid, H5: 0.5% of ethanol + 20 mg/l of gibberellic acid, H6: 0.5% of ethanol + 30 mg/l of gibberellic acid) on mini tubers of two varieties of potato (Agria and Sant?). The longest sprouts were about 14.13 mm long and they were produced by Sant? variety at 18?C and H1 hormone level. Sprouting percentage was higher in Sant? (75.69%) than in Agria (59.72%). The highest average percentage of sprouted tubers (95%) was achieved at the temperature of 18?C and with H4 hormone treatment. Sant? had the shortest dormancy duration by using H1 hormone level at 18?C. Applying H6 hormone level at 18?C produced more sprouts per tuber in Sant?. Sant? was better than Agria with or without hormone treatment in respect of all measured traits. Higher GA concentration accelerates tuber sprouting in both varieties.
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Rivera, Juan D., Javier Torres, and Yaned M. Correa-Navarro. "VALIDATION OF AN ANALYTICAL METHOD FOR THE QUANTIFICATION OF GIBERELLIC ACID IN MAIZE SEEDS (Zea mays L.) BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY." Universitas Scientiarum 25, no. 1 (May 4, 2020): 95–111. http://dx.doi.org/10.11144/javeriana.sc25-1.vahp.
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Gibberellic acid is a phytohormone that triggers the germination of seeds in a state of dormancy. Through the quantification of this hormone, the physiological condition of seeds of economic importance can be studded. In this work we validated a High-Performance Liquid Chromatography method to quantify gibberellic acid in germinated maize (Zea mays L.) seeds. Chromatographic conditions included the use of a C-18 reversed-phase column, acetonitrile-formic acid (1 : 9 %) as the mobile phase, flow of 0.5 mL·min-1, and detection at 195 nm. We evaluated our method for seven analytical parameters. The method was linear for gibberellic acid concentrations from1.0 mg·kg-1 to 50.0 mg·kg-1. The method’s limits were 0.3 mg·kg-1 and1.0 mg·kg-1 for detection and quantification, respectively. The method was highly precise; we obtained variable but low relative standard deviations (2.62 % - 12.66 %) for the studied gibberellic acid concentrations. We assessed accuracy through recovery percentages, ranging from 52.85 % - 63.68 %, for three gibberellic acid concentrations. We conclude that our analytical method can be used to measure gibberellic acid during the early stages of maize germination. In addition, the method could be used for the analysis of other types of plant matrices.
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Janowska, Beata, and Roman Andrzejak. "Effect of gibberellic acid spraying and soaking of rhizomes on the growth and flowering of calla lily (Zantedeschia Spreng.)." Acta Agrobotanica 63, no. 2 (2012): 155–60. http://dx.doi.org/10.5586/aa.2010.043.
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Rhizomes of <i>Zantedeschia</i>, 15-18 cm in circumference with leaf buds 0.5-1 cm in length, were planted into 20-cm pots on 15 May 2006 into a medium consisting of peat with a pH of 6.2, enriched with a slow-release fertiliser Osmocote Plus (3-4M) and mixed with fresh shredded pine bark at a rate of 3:1 (v:v). Before planting, the rhizomes were soaked for 20 minutes in a water solution of gibberellic acid at a concentration of 150 mg x dm<sup>-3</sup>, or sprayed with the same concentration once, twice or three times, each time after thorough drying. For each round of spraying, 100 ml of the solution were used. Gibrescol 10 MG was applied. Gibberellic acid had a similar effect, whether applied in the form of a solution for soaking or spraying of rhizomes. The number of sprayings of rhizomes had no effect on the effectiveness of gibberellic acid. In the cultivar 'Black Magic', rhizome spraying caused earlier flowering, while in 'Cameo' a similar effect was obtained by soaking the rhizomes in gibberellic acid. Gibberellic acid had no effect on the quality of flowers and the number of leaves. Gibberellic acid had a good effect on the index of leaf greenness in the cultivars under study.
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Pavlista, Alexander D., Gary Hergert, Dipak K. Santra, and James A. Schild. "Improving Bean Harvest with Gibberellic Acid." HortTechnology 23, no. 3 (June 2013): 282–87. http://dx.doi.org/10.21273/horttech.23.3.282.
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The lowest pods on common bean (Phaseolus vulgaris) are on or near the ground. Yields may improve by raising these pods to reduce yield loss, especially with direct harvest. The objective of this field study was to use gibberellic acid (GA3) to raise lower pods and increase yield. Seeds of cultivars Poncho (Type III, pinto) and Matterhorn (Type II, great northern) were dipped in GA3 at 0, 125, 500, and 2000 ppm and planted in 30-inch rows (2005). Stem elongation was promoted, but emergence and yield were decreased especially for ‘Poncho’. In foliar tests in 30-inch rows (2005 and 2006), GA3 was applied to newly expanded unifoliolate leaves. Doses were 0, 0.5, 2, and 8 ppm for ‘Poncho’ and 0, 31.25, 125, and 500 ppm for ‘Matterhorn’. The higher doses raised the low pod by 2 inches, and yields harvested conventionally were increased from 14% to 18%. In 2007, ‘Poncho’ and ‘Matterhorn’ unifoliolate leaves were treated with GA3 at 0, 2, and 4 ppm, and 0, 62.5, and 125 ppm, respectively, and then portions of each plot were harvested either manually, conventionally, or directly. Planting was in 22- and 30-inch row spacing. Lower pods were raised by ≈1 inch by GA3. Yields from conventional and direct harvest were increased by foliar GA3 application for both cultivars and both row spacings. Yield from directly harvested GA3-treated plots was comparable to that from untreated conventionally harvested plots. GA3 may play a role in increasing yield from directly harvested common bean in conjunction with genetic and mechanical improvements.
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Soomro, Abdul Samad, Abdul Sattar Soomro, and Shabana Naz Mazari. "Impact of Plant Growth Regulators on Yield and Yield Components in Rice (Oryza sativa L.) Under Field Conditions." International Journal of Applied Sciences and Biotechnology 8, no. 3 (September 29, 2020): 318–22. http://dx.doi.org/10.3126/ijasbt.v8i3.31611.
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The exercise of using (PGRs), especially Gibberellic acid and in field of agriculture has become commercialized in some of the country including Pakistan. Number of different crops are being treated by farmers mostly vegetables; currently evaluated in rice crop through foliar application at different intervals to evaluate their efficiency at different doses. Results revealed that there was no significant difference in crop maturity compared with control. Plant height was variable among treated plots, highest plant height was recorded (121.2cm) in 2017-18 experiment in T-3 Gibberellic acid @ 12grams/acre while minimum (96.2cm) in 2016-17 in T-7 Control. Tillers/hill was increased, and maximum counted 18.5/hill in T-3 Gibberellic acid @ 10gms/acre whereas 11.9/hill was recorded in T-7 Control. Grain filling was obvious recorded with significance; counted 83 percent in T-5 Naphthalene acetic acid treated 100ml/acre whereas average minimum (71.3%) was recorded in T-7 Control. Not only plant development was modified by the treatments but yield was also increased average maximum (3228kgs/acre) with 19.61 percent was recorded in T-5 Naphthalene acetic acid @ 100ml/acre.
Int. J. Appl. Sci. Biotechnol. Vol 8(3): 318-322
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Janowska, B., R. Grabowska, and E. Ratajczak. "Post-harvest longevity of leaves of the sea lavender (Limonium latifolium (Sm.) Kuntze) after application of growth regulators." Horticultural Science 40, No. 4. (November 28, 2013): 172–76. http://dx.doi.org/10.17221/112/2013-hortsci.
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Conditioning is a simple and effective method of post-harvest longevity of both flowers and florists’ greens. Performing this treatment immediately after harvest by the producer increases the quality of floral products expressed as their post-harvest longevity. The purpose of this study was to assess the influence of four growth regulators from the gibberellin and cytokinin groups applied as a 4-h conditioning treatment of leaf blades and to determine any effects on post-harvest longevity of leaves of Limonium latifolium. The leaves were harvested early in the morning from the department of ornamental plants collection. Selected leaves were fully-developed and had no damage or discolouring. Gibberellic acid, benzyladenine, meta- methoxytopolin and its riboside at the concentrations of 25, 50 and 75 mg/dm<sup>3 </sup>were taken up in a solution for 4-h leaf-conditioning of Limonium latifolium at the temperature of 18–20°C. After the conditioning treatment the leaves were placed in distilled water. Leaves placed into distilled water immediately after cutting served as control. Gibberellic acid, benzyladenine and topolins applied as leaf conditioning treatment extended the post-harvest longevity of leaves of Limonium latifolium. Examined growth regulators, with the exception of riboside of meta-methoxytopolin, also had a favourable effect on the index of leaf greenness.
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Zhang, X., J. W. White, and D. J. Beattie. "Regulation of Flowering in Aquilegia." Journal of the American Society for Horticultural Science 116, no. 5 (September 1991): 792–97. http://dx.doi.org/10.21273/jashs.116.5.792.
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Aquilegia × hybrida Sims `Purple' and `Dove' initiated flower buds 5 months after seeding without being exposed to low temperatures. Four experiments were conducted to test the effects of gibberellic acid (GA3), long photoperiod, long photoperiod with a high level of irradiance, and cold treatments on forcing of the two cultivars. Time from treatment to anthesis was reduced by 9 days for defoliated `Purple' plants treated with 250 mg GA3/liter, and by >14 days for defoliated `Dove' plants treated with 125 mg GA3/liter. Defoliated `Purple' or `Dove' plants treated with 18 hours of supplemental high pressure sodium (HPS) light at 250μl mol·m-1·s-2 (18 SH) reached anthesis 14 or 10 days earlier, respectively, after treatment than plants grown under natural daylight (Nat). The 18 SH treatment increased the number of flowers from eight and nine per plant on Nat plants for defoliated `Dove' and `Purple', respectively, to 16 flowers on 18 SH plants. Cold treatments at 4 ± lC did not shorten the interval between treatment and anthesis, but decreased the number of flowers per plant in both cultivars. Chemical name used: gibberellic acid (GA3).
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PATNAIK, J. R., and P. K. NAYAK. "Enhancing cane and sugar productivity applying variable modes of plant growth regulators in sugarcane (Saccharum sp. complex) cultivation under coastal climatic conditions of India." Indian Journal of Agricultural Sciences 90, no. 11 (December 16, 2020): 2174–79. http://dx.doi.org/10.56093/ijas.v90i11.108590.
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A field experiment was carried out for three crop seasons at Sugarcane Research Station, Nayagarh (Odisha) during spring seasons of 2015-16, 2016-17 and 2017-18 to assess the effect of ethrel and gibberellic acid on growth, yield attributing characters, yield and quality of sugarcane (Saccharum sp. complex). Pooled data of three years study indicated that different treatments with plant growth regulators had significant effect on growth, yield and quality parameters of sugarcane. Germination percent of cane buds was the highest in the treatment involving planting of sugarcane setts after overnight soaking in 100 ppm ethrel solution followed by foliar application of gibberellic acid @35 ppm at 90,120 and 150 days after planting (DAP). Other sugarcane growth parameters, viz. number of tillers and plant heights were significantly higher with the application of growth regulators which produced higher number of millable canes (at harvest) than that of other treatments in the test. Overnight soaking of cane setts in 100 ppm ethrel solution followed by foliar application of gibberellic acid @35 ppm at 90,120 and 150 days after planting also produced significantly higher yield parameters, viz. number of millable cane (84.26’ 000 ha-1), cane length (313.6 cm), cane girth (2.94 cm) and single cane weight (1.64 kg) as compared to conventionally planted sugarcane crop. There was no significant influence on juice quality parameters due to various treatments in this study. However, overnight soaking of setts with 100 ppm ethrel solution followed by foliar application of gibberellic acid @ 35 ppm at 90, 120 and 150 days after planting showed comparatively higher values in all the juice quality parameters. Significantly higher cane and sugar yields of 116.14 t/ha and 12.82 t/ha, respectively were obtained with planting of sugarcane after overnight soaking in 100 ppm ethrel solution followed by gibberellic acid spray @ 35 ppm at 90, 120 and 150 days after planting. The above higher yields were attributed mainly to marked improvement in growth and yield attributes in response to application of plant growth regulators. Therefore, it can be concluded that combined application of ethrel and gibberellic acid had the positive effect to improve the growth parameters, yield and quality of sugarcane.
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Janowska, Beata, Roman Andrzejak, Patrycja Jakubowska, Agnieszka Antkowiak, Daria Nawrot, and Anna Krzaczkowska. "The effect of growth regulators on post-harvest Alchemilla mollis (Bauser) Rothm. leaf longevity." Folia Horticulturae 28, no. 2 (December 1, 2016): 137–42. http://dx.doi.org/10.1515/fhort-2016-0016.
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AbstractLeaves ofAlchemilla mollis(Bauser) Rothm. were the subject of the study. The leaves were harvested early in the morning from the department’s ornamental plant collection. Selected leaves were fully-developed and showed no signs of damage or discolouring. Gibberellic acid (GA3), benzyladenine (BA),meta-methoxytopolin (MemT) and its riboside (MemTR) at concentrations of 25, 50 and 75 mg dm−3were applied in the form of solutions to four-hour leaf-conditioning in the room at a temperature of 18-20°C. After conditioning, the leaves were placed in distilled water. Leaves put into distilled water immediately after cutting served as the control. The post-harvest longevity of leaves ofAlchemilla molliswas 7.2-11.8 days. The conditioning of leaves in gibberellic acid solutions at concentrations of 25-50 mg dm−3, benzyladenine at concentrations of 25 mg dm−3andmeta-methoxytopolin and its riboside at concentrations of 75 mg dm−3extended the post-harvest longevity of leaves by 10.1-81.9%. The conditioning of leaves in gibberellic acid at a concentration of 50 mg dm−3inhibited the degradation of chlorophyll, as indicated by the highest SPAD index values.
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Pitel, J. A., and B. S. P. Wang. "Physical and chemical treatments to improve laboratory germination of western white pine seeds." Canadian Journal of Forest Research 15, no. 6 (December 1, 1985): 1187–90. http://dx.doi.org/10.1139/x85-194.
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Two seed lots of western white pine (Pinusmonticola Dougl.) were treated by various chemical and physical methods to increase their germination. For unstratified seeds, treatments by hydrogen peroxide, kinetin, and gibberellic acid, sulfuric acid, or clipping increased germination (33–53%) over that of the controls (7–16%). Lengthwise cutting of the seed coat and soaking in water or potassium nitrate (KNO3) were not as effective. Germination was fastest and greatest (74–83%) with a combined kinetin plus gibberellic acid treatment, followed by H2O2 and cold stratification for 42 days. A combination of clipping and cold stratification for 30–42 days also gave high germination (68–78%). Germination was better at a constant 18 or 20 °C under continuous light than under an alternating 20:30 °C (dark: light) temperature with an 8 h light: 16 h dark photoperiod.