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Letteratura scientifica selezionata sul tema "Effect of gibberellins on"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 26 luglio 2024

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Articoli di riviste sul tema "Effect of gibberellins on"

Mignolli, Francesco, Graciela Beatriz Rojas e María Laura Vidoz. "Supraoptimal ethylene acts antagonistically with exogenous gibberellins during Solanum lycopersicum (Solanaceae) hypocotyl growth." Boletín de la Sociedad Argentina de Botánica 51, n. 2 (15 giugno 2016): 235–42. http://dx.doi.org/10.31055/1851.2372.v51.n2.14836.

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In many plant species, ethylene and gibberellins interact to regulate plant growth and development. In some cases, these hormones can act in a synergistic way whereas in others they can be antagonistic. To date, the control of hypocotyl elongation by ethylene and gibberellins has been poorly explored in tomato. In this paper, we report that, application of exogenous ethylene to tomato seedlings or high endogenous ethylene production, as in the epinastic mutant, strongly prevent the effect of gibberellic acid (GA3) application. Moreover, constitutive activation of gibberellin signal in a DELLA deficient mutant is not able to counteract the inhibitory effect of ethylene on hypocotyl elongation, suggesting that ethylene acts independently from DELLA-mediated gibberellin response. Interestingly, when ethylene perception is blocked, the GA3 promotive effect on hypocotyl length is less effective, indicating that the presence of a basal level of ethylene could synergistically enhance hypocotyl growth. Taken together, these observations may suggest that, in tomato, supraoptimal concentrations of ethylene are able to antagonize gibberellin effect but normal levels seem to promote gibberellin-induced hypocotyl elongation.

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Janas, Krystyna M., e Jiři Šebánek. "Effect of cotyledons and epicotyl upon the activity of endogenous gibberellins in roots of flax (Linum usitatissimum L.) seedlings". Acta Agrobotanica 34, n. 2 (2013): 231–33. http://dx.doi.org/10.5586/aa.1981.017.

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In 11-day-old flax seedlings, the level of endogenous gibberellins in roots decreased within 12 hours after the excision of cotyledons and the epicotyl; however, 24 to 48 hours after excision the gibberellin level increased again. The decrease in the gibberellin level within the first 12 hours after excision suggests a participation of the cotyledons and the epicotyl in the biosynthesis of endogenous gibberellins.

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Yogi, Yogi, St Subaedah e Muliaty Galib. "INVIGORASI BENIH KEDELAI (Glycine max L Merill) DENGAN MENGGUNAKAN BERBAGAI DOSIS DAN WAKTU PERENDAMAN HORMON GIBERELIN". AGrotekMAS Jurnal Indonesia: Jurnal Ilmu Peranian 4, n. 1 (18 aprile 2023): 119–25. http://dx.doi.org/10.33096/agrotekmas.v4i1.319.

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This study aimed to determine the effect of seed invogoration using the concentration and soaking time of the gibberellin hormone and the interaction between the two on the viability and vigor of soybean seeds. Indonesia. This study was arranged based on a completely randomized design with a 2-factor pattern. The first factor was the concentration of growth hormone gibberellin GA3 with 3 levels, namely without growth hormone (control), 50 ppm gibberellins and 100 ppm gibberellins. The second factor is immersion time with 3 levels, namely soaking 30 minutes, 60 minutes and 90 minutes. The results showed that the administration of 100 ppm gibberellins gave better results in terms of germination, germination speed (46.60%/etmal) and germination at the same time. The gibberellin immersion time of 60 minutes gave better results for germination speed, which was 46.09. %/etmal. The interaction between the administration of the hormone gibberellin 100 ppm with an immersion time of 60 minutes had no significant effect.

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Putri, Asri Insiana, e Toni Herawan. "Pengaruh Gibberellin (GA4) terhadap Waktu Perkecambahan dan Pertumbuhan Tinggi Semai Cendana (Santalum Album Linn.)". Jurnal Ilmu Kehutanan 2, n. 2 (1 luglio 2008): 63. http://dx.doi.org/10.22146/jik.821.

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Effect of Gibberellins (GA4) on Germination Time and Height of Cendana (Santalum album Linn.) The hemiparasite Santalum album Linn. (cendana) grows very slow, in nature the rare and difficult seeds need stimulation to germinate. Gibberellins (including GA4) are growth regulators, usually used to increase growth as well as to break seed dormancy. The objectives of this research were to investigate the influence of gibberellins on germination percentage and height of cendana growth. Experiment was laid out in a Completely Randomized Design with 3 replicates of 300 seeds for germination percentage and 3 replicates of 10 seeds for seedling growth. Gibberellin was applied as treatment with 100, 300, and 500 ppm. The seed germination was recorded until 9 weeks, and height of plants measured until 8 months at the greenhouse. The results showed that the addition of gibberellins at all treatment increased the percentage of germination and caused the seeds germinated four weeks earlier than the control. In the first 4 months, 500 ppm gibberellins gave the highest acceleration of germination, afterward all treatments have relatively the same influences. Gibberellins gave positive effect on height of cendana growth. After 7 months, the growth decreased although all gibberellin treatments gave higher growth than the control.

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Kyari, B. A., Z. A. Lawan, M. S. Waziri, H. M. Ajiri, B. Apagu, H. Mari e M. A. Ibrahim. "Effect of Imbibition Time on Hormonal Changes of Germinating Tamarindus indica and Prosopis juliflora". Indonesian Journal of Agricultural Research 5, n. 3 (16 giugno 2023): 219–30. http://dx.doi.org/10.32734/injar.v5i03.6573.

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Imbibition time and hormonal changes play a significant role in seed germination. This study, evaluated the effects of some phytohormones; indole acetic acid (IAA), abscisic acid (ABA), gibberellin and cytokinins) and imbibition time (0, 48 and 96 hours) on Tamarindus indica and Prosopis juliflora. High-Performance Liquid Chromatography (HPLC) was used to determine the concentrations of the hormones. Results indicated significantly higher and faster in P. juliflora than T. indica. The germination rate was 4.1 - 68.1% and 4.0 - 61.4%, and model for inhibition time 28.256ln(x) and 25.791ln(x), respectively. Similarly, results also expressed highly significant variable changes in the concentrations of the four studied phytohormones between T. indica (0.491 - 0.705 mg/ml) and P. Juliflora (0.109 - 1.130 mg/ml). The concentrations of IAA and ABA were significantly higher by 60.6% and 77.7% in the seeds of T. indica than P. juliflora, respectively. P. juliflora had 37.6% and 12.5% higher cytokinin and gibberellin than T. indica, respectively. Cytokinin (0.7951 - 1.0939 mg/ml), gibberellins (0.535 - 0.757 mg/ml), IAA (0.363 - 0.419 mg/ml) and ABA (0.250 - 0.335 mg/ml) also varied significantly over the periods. In general, cytokinin and gibberellins increased by 8.1 - 27.3% and 22.9 - 23.0%, while that of IAA and ABA decreased 13.6 - 15.4% and 26.4 - 34.0%, over the imbibitions time of 0-96 hours. In conclusion, higher germination of P. juliflora is attributed to cytokinin and gibberellins, and the lower germination in T. indica to the higher inhibitory effects of IAA and ABA.

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Sabovljevic, Aneta, Marko Sabovljevic e D. Grubisic. "Gibberellin influence on the morphogenesis of the moss Bryum argenteum Hedw. in in vitro conditions". Archives of Biological Sciences 62, n. 2 (2010): 373–80. http://dx.doi.org/10.2298/abs1002373s.

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The moss Bryum argenteum Hedw. was treated with gibberellins as well as some inhibitors of gibberellin biosynthesis in order to investigate their influence on B. argenteum morphogenesis. Generally, gibberellins have not been chemically identified in bryophytes, while other groups of classical phytohormones (auxins, cytokinins, abscisic acid and ethylene) have been chemically identified in these plants. The in vitro culture of the moss Bryum argenteum was established from sterilized spores. The apical shoots of untreated gametophytes grown in vitro were used to investigate the influence of different substances on secondary protonema and on the growth and multiplication of the gametophytes. B. argenteum reacts differently to the growth regulators applied. Both gibberellins applied in vitro (GA3 and GA7) have a positive effect on B. argenteum morphogenesis. Shoot multiplication was negatively affected by three tested growth retardants (ancymidol, BX-112 and chlorocholine chloride), while these substances did not have such strong effects on the moss protonema development.

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Liu, Shuping, Junyang Lu, Jun Tian, Ping Cao, Shuhao Li, Haicui Ge, Mingxuan Han e Fenglin Zhong. "Effect of Photoperiod and Gibberellin on the Bolting and Flowering of Non-Heading Chinese Cabbage". Horticulturae 9, n. 12 (18 dicembre 2023): 1349. http://dx.doi.org/10.3390/horticulturae9121349.

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Non-heading Chinese cabbage (cabbage) is an essential green leafy vegetable, and bolting and flowering are necessary for reproduction. However, further research is needed to study the effect of photoperiod on the bolting and flowering of cabbage, particularly on the development of the stem. In this study, we performed phenotypic analysis and measured endogenous gibberellin levels in the cabbage. We carried out these experiments under four different photoperiodic treatments, 12 h (light)/12 h (dark), 14 h (light)/10 h (dark), 16 h (light)/8 h (dark), and 18 h (light)/6 h (dark). The results showed that the time of bolting and flowering gradually decreased with increasing light duration. The development of stems was optimal under the 16 h (light)/8 h (dark) photoperiod treatment, and the same result was obtained via cytological observation. In addition, the changes in the endogenous gibberellin3 (GA3) content under different photoperiodic treatments were consistent with the development of stems and peaked at 16 h (light)/8 h (dark). At the same time, qRT-PCR analysis showed that the relative expression of the key gibberellin synthase genes, BcGA3ox2 and BcGA20ox2, exhibited upregulation. When treated with exogenous GA3 and its synthesis inhibitor, paclobutrazol (PAC), exogenous gibberellins significantly promoted bolting; conversely, gibberellin inhibitors suppressed the bolting, flowering, and stem elongation of cabbage. Therefore, the photoperiod may regulate cabbage bolting by regulating endogenous GA3.

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Verma, Meena, Roop Singh Bora, Imran Sheikh, Vinod Kumar, Punesh Sangwan e Harcharan Singh Dhaliwal. "Effect of gibberellins and ascorbic acid treatment on phytic acid and micronutrients dialyzability in germinated biofortified wheat seeds". Indian Journal of Community Health 33, n. 1 (31 marzo 2021): 123–29. http://dx.doi.org/10.47203/ijch.2021.v33i01.017.

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Introduction: Phytic acid chelate minerals, including Fe and Zn and render them inaccessible once ingested by human beings. The evaluation of differences in the dialyzability of macronutrients including Fe and Zn in various wheat derivatives is therefore important for the enhancement of nutritional quality of grains. Objectives: The objective of current study was to improve the micronutrient content in wheat grain. Methods: During germination (12, 24, 48, 72, 96 h), effects of gibberellins and ascorbic acid on phytic acid content as well as dialyzability of iron and zinc of wheat derivatives were determined. Results: The phytic acid content in wheat flour was determined and it was found 7.61 to 7.48 mg/g. After the treatment with gibberellins, it was significantly reduced from 8.68 to 21.6 % and 9.65 to 20.9 % with ascorbic acid. In wheat flour dialyzabilty of Fe was 4.53 to 8.97 mg/kg. After germination, Fe content was increased from 9.77 to 32.0 % with gibberellin, and 13.9 to 31.0 % with ascorbic acid. Moreover, with gibberellins, Zn content was increased from 8.68 to 21.6 % and 9.65 to 20.9 % with ascorbic acid, respectively. Conclusion: These results suggested that gibberellins as well as ascorbic acid can be exploited to improve the dialyzability of iron and zinc content due to reduced antinutrient i. e phytic acid and make the minerals available for the absorption in monogastric animals including human beings.

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Castro-Camba, Ricardo, Conchi Sánchez, Nieves Vidal e Jesús Mª Vielba. "Plant Development and Crop Yield: The Role of Gibberellins". Plants 11, n. 19 (9 ottobre 2022): 2650. http://dx.doi.org/10.3390/plants11192650.

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Gibberellins have been classically related to a few key developmental processes, thus being essential for the accurate unfolding of plant genetic programs. After more than a century of research, over one hundred different gibberellins have been described. There is a continuously increasing interest in gibberellins research because of their relevant role in the so-called "Green Revolution", as well as their current and possible applications in crop improvement. The functions attributed to gibberellins have been traditionally restricted to the regulation of plant stature, seed germination, and flowering. Nonetheless, research in the last years has shown that these functions extend to many other relevant processes. In this review, the current knowledge on gibberellins homeostasis and mode of action is briefly outlined, while specific attention is focused on the many different responses in which gibberellins take part. Thus, those genes and proteins identified as being involved in the regulation of gibberellin responses in model and non-model species are highlighted. The present review aims to provide a comprehensive picture of the state-of-the-art perception of gibberellins molecular biology and its effects on plant development. This picture might be helpful to enhance our current understanding of gibberellins biology and provide the know-how for the development of more accurate research and breeding programs.

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Iskandaria, Weyni, Nindi Darmawanti, Siti Nur Annisa Boang Manalu, Indayana Febriani Tanjung e Febry Ramadhani Hasibuan. "The Effect of Growth Regulating Substances Giberelin on The Growth of Cucumber (Cucumis sativus)". Jurnal Biologi Tropis 23, n. 1 (14 gennaio 2023): 269–72. http://dx.doi.org/10.29303/jbt.v23i1.4603.

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Cucumber is one of Indonesia's agricultural commodities which is in great demand by the public, but in an effort to fulfill the number of requests a way is needed to be able to increase the amount of production. One of them is the use of growth regulators in supporting the growth of cucumber seeds. Gibberellin is a growth regulator that stimulates the growth of plant stems and leaves. This study aims to determine the effect of using gibberellins on cucumber plants (Cucumis sativus). The method used in this study was direct testing with 4 treatments, namely 0 ppm, 150 ppm, 175 ppm and 200 ppm with each treatment being tested with 5 samples. The materials used in this study were cucumber seeds, sand, manure, water and the hormone gibberellin (GA3). The tools used are digital scales, measuring cups, label paper, scissors, ruler, tape measure, polybags and hoes. The results of the study found that in treatment VI (200 ppm) the hormone gibberellins had a more significant effect on the growth of cucumber seeds compared to treatments I (0 ppm), II (150 ppm and III (175 ppm).

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Più fonti

Tesi sul tema "Effect of gibberellins on"

Gxaba, Nomagugu. "The effect of exogenous growth regulators on salinity tolerance in Erucastrum strigosum". University of the Western Cape, 2003. http://hdl.handle.net/11394/8268.

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Magister Scientiae (Biodiversity and Conservation Biology) - MSc (Biodiv and Cons Biol)
Randomized block experiments were conducted to examine the putative amelioratory effects of kinetin or gibberellic acid at concentrations (0, 4, 12.5, 40, and 125 μM) in Erucastrum strigosum plants subjected to a salinity series (0, 100, 200, 300, and 400 mM NaCl) in the greenhouse. When the highest salinity concentration (increased stepwise) was reached, growth effects in relation to water and cation content of the plants were evaluated. Growth and water content were reduced progressively with salinity treatments. Na+ concentration accumulated with salinity treatments to levels that were much higher than that of other cations (K+, Ca2+ and Mg2+) in both organs. However, it is noteworthy that Na+ distribution was more in shoots than in roots. In kinetin treated plants, shoot growth decreased whilst root growth increased with moderate hormonal treatments.

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Darwiche, Amal Omar 1964. "Effect of cytokinin, gibberellin, and nitrogen applications on the growth of eldarica pine seedlings". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276979.

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A greenhouse experiment was conducted over a ninety day period to test the effect of different nitrogen fertilizer regimes and several application rates of compounds with gibberellin and cytokinin activity (GA4/7 and BA, respectively) on the growth and development of Pinus brutia var. eldarica. Nitrogen produced no significant effects and this was attributed to its abundance in the potting medium, to begin with. All levels of growth regulators used showed a highly significant effect on vegetative development. A reduction in root collar diameter, shoot elongation, needle nitrogen content and oven-dry weight, was observed, especially when the medium and high hormonal rates were used. Phytotoxicity increased with the increase in concentration of both chemicals. Ba induced a proliferation of adventitious buds along the stem of saplings, but this was accompanied with rapid new top growth and branching at the top only when BA was applied in conjunction with GA4/7.

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Rossouw, Jan Adriaan. "Effect of cytokinin and gibberellin on potato tuber dormancy". Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-07302008-164519.

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Pound, William Eugene. "The effect of 1,1-dimethylaminosuccinamic acid (B-nine SP) on endogenous gibberellic acids in Chrysanthemum morifolium /". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859495302.

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Bezuidenhout, Johannes Jacobus. "Elucidating the dual physiological induced effect of gliotoxin on plants / Johannes Jacobus Bezuidenhout". Thesis, North-West University, 2011. http://hdl.handle.net/10394/6945.

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Fungi and Oomycetes represent the two most important groups of eukaryotic plant pathogens. Besides chemical and physical control of these pathogens, biological control is an approach enjoying increasingly more focus. One of the biological agents increasingly employed in biological control of plant pathogenic fungi is ironically the fungus Trichoderma, more specifically Trichoderma harzianum. Besides control of the fungal plant pathogens, another interesting aspect observed when plants are treated with Trichoderma harzianum are effects such as complete and even stand of plants, faster seed germination, increases in plant height and overall enhanced plant growth. Though there have been various studies on this effect, almost no research has yet been conducted to elucidate the mechanism by which these effects occur. In particular, effects such as faster seed germination suggest that Trichoderma harzianum produces a metabolite that may mimic the plant growth hormone gibberellic acid. Through an evaluation of the various metabolites produced by Trichoderma harzianum; gliotoxin seemed structurally most similar to gibberellic acid. To verify that gliotoxin can indeed serve as an analogue for gibberellic acid and elicit similar physiological responses in plants, a two–pronged approach was followed. Firstly, molecular similarity evaluation through common pharmacophore evaluation was conducted, followed by docking simulations into the recently discovered receptor for gibberellic acid. Common pharmacophore evaluation between gibberellic acid and gliotoxin showed successful alignment of gliotoxin into the gibberellic acid based pharmacophore space. Furthermore, docking simulations further strengthened this by the similarity in docking scores calculated and the similar poses of the ligands (gliotoxin and gibberellic acid) in the receptor space. However, similarity in pharmacophore alignment and docking simulation results only suggest that gliotoxin should be able to occupy the receptor space, but it is not a guarantee that similar physiological responses will be elicited. In the second part of the project, the ability of gliotoxin to elicit similar physiological responses in plants to gibberellic acid was investigated. For this, a–amylase induction; plant emergence and height; and chlorophyll fluorescence were compared for both gliotoxin and gibberellic acid treatments. In terms of a–amylase induction, gliotoxin was able to induce production of the enzyme as visualised by starch–containing native gel electrophoresis (zymograms). Gliotoxin induced the strongest response at a 10–6 M dilution which is typically the range expected for hormones in biological systems in de–embryonated seeds of Phaseolus vulgaris. Gibberellic acid was able to induce the strongest response at a 10–7 M dilution. In essence, similar physiological responses were observed. In terms of plant emergence and plant height, treatment with gliotoxin or gibberellic acid resulted in plant emergence a day earlier than the untreated control. However, even though there were slight differences in plant height favouring the gliotoxin or gibberellic acid treated plants, the differences were not statistically significant. Thus, in this regard similar responses were again observed for both gliotoxin and gibberellic acid treatments. In the final evaluation the effect of gliotoxin and gibberellic acid treatments on the chlorophyll fluorescence of mature plants was investigated. Overall, both gliotoxin and gibberellic acid elicited beneficial effects on plant vitality, expressed through PI(Abs) with the gliotoxin treatment performing better than the equivalent gibberellic acid treatment. Overall, the physiological tests demonstrated that gliotoxin can indeed elicit similar positive physiological responses to gibberellic acid in Phaseolus vulgaris. Furthermore the test used in this project can serve as a standard evaluation bench for screening for gibberellic acid analogues on a laboratory scale before larger scale field trials are considered.
Thesis (Ph.D. (Microbiology))--North-West University, Potchefstroom Campus, 2012.

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Loaring, Huw W. "Alkylation studies on the gibberellins". Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338439.

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Harrison, Polly A. "Partial synthesis of selected gibberellins". Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294577.

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Dickson, Ross L. "The effect of water stress, nitrogen and gibberellic acid on the phytotoxicity of post-emergent herbicides to Avena spp". Lincoln University, 1990. http://hdl.handle.net/10182/1283.

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A series of experiments was carried out on cultivated oat (Avena sativa L. cv Amuri) to examine the efficacies of fluazifop-butyl and glyphosate against water stressed plants, plants grown in low and high nitrogen and plants treated with gibberellic acid (GA₃). Avena sativa L. was used as a test plant and on completion of the experiments, further studies were carried out on the weed species wild oat (Avena fatua L.). In the laboratory, plants maintained at wilting point for five days before and nine days after spraying and treated with fluazifop-butyl (0.5 kg a.i./ha) appeared healthy 32 days after herbicide application, while plants supplied with water throughout the experiment were completely chlorotic/necrotic and had main stem detachment from within the leaf sheaths. In the field, plants maintained unirrigated until 14 days after spraying with fluazifop-butyl (0.25 kg a.i./ha) or glyphosate (0.18 kg a.i./ha) showed greater tolerance to the herbicides than plants irrigated regularly. Values for seed head yield for water stressed and irrigated plants, 45 days after applying fluazifop-butyl, were 66 g and zero g dryweight/m² respectively. Comparable values for glyphosate treated plants were 65 g and 25 g dryweight/m². Radiolabel studies indicated that in comparision with well watered plants, water stressed plants absorbed 20% less applied ¹⁴C-glyphosate. In addition, the proportion of absorbed ¹⁴C-glyphosate translocated from the treated leaf was 15% less under water stress conditions. Uptake of ¹⁴C-fluazifop-butyl was similar under well watered and water stress conditions and was 30-40% of that applied. The proportion of absorbed ¹⁴C-activity which was transported was very low, but was greater under well watered conditions (7.6%) than under water stress conditions (4.4%). Under well watered conditions in the laboratory and field, fluazifop-butyl (0.25 kg a.i./ha) and glyphosate (0.18 kg a.i./ha) were less toxic at low nitrogen than high nitrogen. For example, 34 days after spraying with fluazifop-butyl under laboratory conditions total plant dry weight was 1.51 g and 0.56 g at 1.0 mol/m³ and 10 mol/m³ applied nitrate respectively. As with soil water content, soil nitrogen content had no effect on uptake of fluazifop-butyl. However, the proportion of absorbed fluazifop-butyl which was translocated out of the treated lamina was greater under high nitrogen conditions (26.1 %) than under low nitrogen conditions (9.3%). Under laboratory conditions, addition of 200 µg GA₃to the leaf sheaths two days prior to spraying with fluazifop-butyl or glyphosate increased the efficacy of both herbicides at low nitrogen. Similarly, under field conditions application of GA₃ (0.21 kg/ha) two days prior to spraying with glyphosate increased the performance of the herbicide against Avena sativa L. growing in a nitrogen depleted soil. At harvest, seed head yield for GA₃ treated and non-treated plants was zero and 7.4 g dry weight/m² respectively. Experiments with Avena latua L. showed that this species was tolerant of fluazifop-butyl and glyphosate when grown in low water or low nitrogen conditions. Under water stress conditions, pre-treatment with GA₃ increased the phytotoxicity of fluazifop-butyl to Avena latua L. Similarily, GA₃ enhanced the phytotoxicity of glyphosate to Avena latua L. grown under low nitrogen conditions. Reduced performance of fluazifop-butyl under stress conditions involves a reduction in translocation of herbicide to meristems, but other factors are likely to be involved. It was concluded that for glyphosate, reductions in uptake and translocation of the herbicide are important factors causing reduced performance of this herbicide under stress conditions. Possible reasons for GA₃ enhancement of fluazifop-butyl and glyphosate activity under stress conditions are discussed and the potential of growth regulators as adjuvants is considered.

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Stokes, Tania Selvayogini. "Gibberellins and cytokinins in Rumex acetosa L". Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621418.

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Huntley, Rachel Paula. "Cytokinins and gibberellins in oil palm sex determination". Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388546.

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Più fonti

Libri sul tema "Effect of gibberellins on"

Rebers, M. Gibberellins and the cold requirement of tulip. Wageningen: [s.n., 1994.

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Hall, J. Peter. Flower promotion in black spruce seedlings using gibberellins. St John's: Newfoundland Forestry Centre, 1986.

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Takahashi, Nobutaka, Bernard O. Phinney e Jake MacMillan, a cura di. Gibberellins. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1.

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Duckett, Catherine Mary. The effects of gibberellic acid on plant molecules. Norwich: University of East Anglia, 1992.

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S, Veselov D., a cura di. Gormony rasteniĭ: Reguli︠a︡t︠s︡ii︠a︡ kont︠s︡entrat︠s︡ii, svi︠a︡zʹ s rostom i vodnym obmenom. Moskva: Nauka, 2007.

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Aftab, Tariq, a cura di. Auxins, Cytokinins and Gibberellins Signaling in Plants. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05427-3.

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Ebing, W., H. Börner, D. Martin, V. Sjut, H. J. Stan e J. Stetter, a cura di. Herbicide Resistance — Brassinosteroids, Gibberellins, Plant Growth Regulators. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-48787-3.

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1933-, Adam G., a cura di. Herbicide resistance--brassinosteroids, gibberellins, plant growth regulators. Berlin: Springer-Verlag, 1991.

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Böse, Gerhard. Reaktionsbedingungen von Oxygenasen der Gibberellinbiosynthese. Konstanz: Hartung-Gorre, 1991.

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Gottfried, Gerald J. Effects of gibberellic acid, N-6-benzylaminopurine, and acetone on pinyon (Pinus edulis) germination. Washington, D.C: U.S. G.P.O., 1992.

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Capitoli di libri sul tema "Effect of gibberellins on"

Izumi, K., e H. Oshio. "Effects of the Growth Retardant Uniconazole-P on Endogenous Levels of Hormones in Rice Plants". In Gibberellins, 330–38. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_32.

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Kamada, H., T. Ogasawara e H. Harada. "Effects of Gibberellin A3 on Growth and Tropane Alkaloid Synthesis in Ri Transformed Plants of Datura innoxia". In Gibberellins, 241–48. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_23.

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Moore, Thomas C. "Gibberellins". In Biochemistry and Physiology of Plant Hormones, 94–157. New York, NY: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4612-3654-2_3.

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Kalra, Geetika, e Satish C. Bhatla. "Gibberellins". In Plant Physiology, Development and Metabolism, 617–28. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2023-1_17.

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Bhatla, Satish C., e Manju A. Lal. "Gibberellins". In Plant Physiology, Development and Metabolism, 431–41. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5736-1_17.

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Gooch, Jan W. "Gibberellins". In Encyclopedic Dictionary of Polymers, 895. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13833.

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Tamura, S. "Historical Aspects of Gibberellins". In Gibberellins, 1–8. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_1.

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Hedden, P. "Gibberellin Biosynthetic Enzymes and the Regulation of Gibberellin Concentration". In Gibberellins, 94–105. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_10.

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Bush, D. S., L. Sticher e R. L. Jones. "Gibberellin A3-Regulated α-Amylase Synthesis and Calcium Transport in the Endoplasmic Reticulum of Barley Aleurone Cells". In Gibberellins, 106–13. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_11.

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Akazawa, T., J. Yamaguchi e M. Hayashi. "Rice α-Amylase and Gibberellin Action—A Personal View". In Gibberellins, 114–24. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3002-1_12.

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Atti di convegni sul tema "Effect of gibberellins on"

Shaker Mahmoud, Raam, e Ammar Al-Zubade. "Effect of Gibberellin Spraying On Yield of Bean and Its Components". In IX. International Scientific Congress of Pure, Applied and Technological Sciences. Rimar Academy, 2023. http://dx.doi.org/10.47832/minarcongress9-11.

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A field experiment was conducted at the research field station of the Field Crops Department, College of Agricultural Engineering Sciences, University of Baghdad, Jadriya, during the year 2017-2018— the experiment aimed to study the effect of growth regulator gibberellin on broad bean growth and yield. In a factorial experiment according to RCBD design, the first factor was gibberellin spraying stages (the beginning of vegetative growth and the beginning of flowering), while the second factor was gibberellin concentrations (100, 200, and 300 mg L1), in addition to the comparison treatment, which was sprayed with water only. It was flowering by giving it the highest average plant height, number of pods, and seeds per pod. The results showed the superiority of the spraying stage at the beginning of flowering by giving it the highest mean of plant height, number of pods, and number of seeds per pod. In the spraying phase at the beginning of flowering (S2) and a concentration of 300 mg L-1, the highest average number of pods per plant reached 20.00 pods per plant. In comparison, a treatment at the beginning of flowering (S2) and a concentration of 200 mg L-1 achieved the highest average number of seeds per pod, reached 4.50 Seed in the pod, and achieved the spraying stage at the beginning of vegetative growth (S1) and the concentration was 200 mg L-1, the highest average was 133.3 g. We conclude from this study that spraying gibberellin at the beginning of flowering affected growth indicators and increased yield by increasing the averages of its components, especially by increasing the concentration of gibberellin at 200 and 300 mg L-1.

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Zhang, Yuyang, Huifen Zhang, Yan Zhou e Jie Zhou. "Effect of gibberellin on fruit preservation and quality of Zizyphus Jujuba lZhanshanmizaor". In 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/iceep-18.2018.144.

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Enascuta, Emanuela. "THE EFFECT OF USING GIBBERELLIC ACID AND AMINO ACIDS ON RAPESEED CROP". In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/4.1/s17.068.

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Ria, Elly, Reni Nurhayatini e Yesi Agustin. "The Effect of Gibberellin (GA3) Concentration on The Growth of Sugarcane Orchid (Grammatophyllum speciosum) Protocorm in Vitro". In Proceedings of the 1st International Conference on Islam, Science and Technology, ICONISTECH 2019, 11-12 July 2019, Bandung, Indonesia. EAI, 2020. http://dx.doi.org/10.4108/eai.11-7-2019.2297524.

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Bojovic, Biljana, Milica Kanjevac e Dragana Jakovljevic. "EFEKAT PRAJMIRANJA SEMENA PŠENICE (Triticum aestivum L.) NA SADRŽAJ FOTOSINTETSKIH PIGMENATA I UKUPNIH SOLUBILNIH PROTEINA". In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.401b.

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In this paper, effect of different priming treatments in the pregerminative phase of wheat seeds (Triticum aestivum L.) on the concentration of photosynthetic pigments and total soluble proteins in the leaf of seedling was investigated. Seeds were treated with solutions of the phytohormones gibberellin and auxin (hormone priming), salts of potassium and magnesium (halo priming), ascorbic acid and hydrogen peroxide (chemo priming) and water (hydro priming). Based on the obtained results, it was determined that the content of pigments and total soluble proteins can be increased by applying the appropriate priming treatment. The most favorable effect on the examined parameters was observed in the treatment with potassium nitrate.

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Ahmed, Ebtisam Esmaael, e Yusra Mohammed Saleh. "Effect of spraying with Gibberellic and ascorbic acids on growth, flowering and corm production of two freesia cultivars Freesia Hybrid". In 2ND INTERNATIONAL CONFERENCE ON APPLIED RESEARCH AND ENGINEERING (ICARAE2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0170966.

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Kotova, L. M., e A. A. Kotov. "THE ROLE OF GIBBERELLINS IN CORRELATIVE INTERACTIONS BETWEEN THE SHOOTS OF PEA PLANTS". In The All-Russian Scientific Conference with International Participation and Schools of Young Scientists "Mechanisms of resistance of plants and microorganisms to unfavorable environmental". SIPPB SB RAS, 2018. http://dx.doi.org/10.31255/978-5-94797-319-8-443-447.

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Raeva-Bogoslovskaya, Ekaterina, e Olga Molkanova. "Effects of gibberellic acid on the regeneration of Amelanchier Medik. cultivars in vitro". In INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “INNOVATIVE TECHNOLOGIES IN AGRICULTURE”. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0165012.

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Xue, Wanwan, Keqiang Li, Jin Zou, Hang Li e Ronggao Gong. "Effects of Gibberellin（GA3）on Antioxidant Enzyme Activity in Sweet Cherry Fruit at Different Developmental Stages". In Proceedings of the 2018 3rd International Conference on Advances in Materials, Mechatronics and Civil Engineering (ICAMMCE 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/icammce-18.2018.13.

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Liang, Chao, e Ruyan Yang. "IPO's Contagion Effect and Competition Effect". In 2012 Fifth International Conference on Business Intelligence and Financial Engineering (BIFE). IEEE, 2012. http://dx.doi.org/10.1109/bife.2012.61.

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Rapporti di organizzazioni sul tema "Effect of gibberellins on"

Friedman, Haya, Chris Watkins, Susan Lurie e Susheng Gan. Dark-induced Reactive Oxygen Species Accumulation and Inhibition by Gibberellins: Towards Inhibition of Postharvest Senescence. United States Department of Agriculture, dicembre 2009. http://dx.doi.org/10.32747/2009.7613883.bard.

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Dark-induced senescence could pose a major problem in export of various crops including cuttings. The assumption of this work was that ROS which is increased at a specific organelle can serve as a signal for activation of cell senescence program. Hormones which reduce senescence in several crops like gibberellic acid (GA) and possibly cytokinin (CK) may reduce senescence by inhibiting this signal. In this study we worked on Pelargonium cuttings as well as Arabidopsis rosette. In Pelargonium the increase in ROS occurred concomitantly with increase in two SAGs, and the increase persisted in isolated chloroplasts. In Arabidopsis we used two recentlydeveloped technologies to examine these hypotheses; one is a transcriptome approach which, on one hand, enabled to monitor expression of genes within the antioxidants network, and on the other hand, determine organelle-specific ROS-related transcriptome footprint. This last approach was further developed to an assay (so called ROSmeter) for determination of the ROS-footprint resulting from defined ROS stresses. The second approach involved the monitoring of changes in the redox poise in different organelles by measuring fluorescence ratio of redox-sensitive GFP (roGFP) directed to plastids, mitochondria, peroxisome and cytoplasm. By using the roGFP we determined that the mitochondria environment is oxidized as early as the first day under darkness, and this is followed by oxidation of the peroxisome on the second day and the cytoplast on the third day. The plastids became less oxidized at the first day of darkness and this was followed by a gradual increase in oxidation. The results with the ROS-related transcriptome footprint showed early changes in ROS-related transcriptome footprint emanating from mitochondria and peroxisomes. Taken together these results suggest that the first ROS-related change occurred in mitochondria and peroxisomes. The analysis of antioxidative gene’s network did not yield any clear results about the changes occurring in antioxidative status during extended darkness. Nevertheless, there is a reduction in expression of many of the plastids antioxidative related genes. This may explain a later increase in the oxidation poise of the plastids, occurring concomitantly with increase in cell death. Gibberellic acid (GA) prevented senescence in Pelargonium leaves; however, in Arabidopsis it did not prevent chlorophyll degradation, but prevented upregulation of SAGs (Apendix Fig. 1). Gibberellic acid prevented in Pelargonium the increase in ROS in chloroplast, and we suggested that this prevents the destruction of the chloroplasts and hence, the tissue remains green. In Arabidopsis, reduction in endogenous GA and BA are probably not causing dark-induced senescence, nevertheless, these materials have some effect at preventing senescence. Neither GA nor CK had any effect on transcriptome footprint related to ROS in the various organelles, however while GA reduced expression of few general ROS-related genes, BA mainly prevented the decrease in chloroplasts genes. Taken together, GA and BA act by different pathways to inhibit senescence and GA might act via ROS reduction. Therefore, application of both hormones may act synergistically to prevent darkinduced senescence of various crops.

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Or, Etti, Tai-Ping Sun, Amnon Lichter e Avichai Perl. Characterization and Manipulation of the Primary Components in Gibberellin Signaling in the Grape Berry. United States Department of Agriculture, gennaio 2010. http://dx.doi.org/10.32747/2010.7592649.bard.

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Seedless cultivars dominate the table grape industry. In these cultivars it is mandatory to apply gibberellin (GA) to stimulate berry development to a commercially acceptable size. These cultivars differ in their sensitivity to GA application, and it frequently results in adverse effects such as decreased bud fertility and increased fruit drop. Our long term goals are to (1) understand the molecular basis for the differential sensitivity and identify markers for selection of sensitive cultivars (2) to develop new strategies for targeted manipulation of the grape berry response to GA that will eliminate the need in GA application and the undesirable effects of GA on the vine, while maintaining its desirable effects on the berry. Both strategies are expected to reduce production cost and meet growing consumer demand for reduced use of chemicals. This approach relies on a comprehensive characterization of the central components in the GA signaling cascade in the berry. Several key components in the GA signaling pathway were identified in Arabidopsis and rice, including the GA receptors, GID1s, and a family of DELLA proteins that are the major negative regulators of the GA response. GA activates its response pathway by binding to GID1s, which then target DELLAs for degradation via interaction with SLY, a DELLA specific F-box protein. In grape, only one DELLA gene was characterized prior to this study, which plays a major role in inhibiting GA-promoted stem growth and GA-repressed floral induction but it does not regulate fruit growth. Therefore, we speculated that other DELLA family member(s) may control GA responses in berry, and their identification and manipulation may result in GA-independent berry growth. In the current study we isolated two additional VvDELLA family members, two VvGID1 genes and two VvSLY genes. Arabidopsis anti-AtRGA polyclonal antibodies recognized all three purified VvDELLA proteins, but its interaction with VvDELLA3 was weaker. Overexpression of the VvDELLAs, the VvGID1s, and the VvSLYs in the Arabidopsis mutants ga1-3/rga-24, gid1a-2/1c-2 and sly1-10, respectively, rescued the various mutant phenotypes. In vitro GAdependent physical interaction was shown between the VvDELLAs and the VvGID1s, and GAindependent interaction was shown between the VvDELLAs and VvSLYs. Interestingly, VvDELLA3 did not interact with VvGID1b. Together, the results indicate that the identified grape homologs serve as functional DELLA repressors, receptors and DELLA-interacting F-box proteins. Expression analyses revealed that (1) VvDELLA2 was expressed in all the analyzed tissues and was the most abundant (2) VvDELLA1 was low expressed in berries, confirming former study (3) Except in carpels and very young berries, VvDELLA3 levels were the lowest in most tissues. (4) Expression of both VvGID1s was detected in all the grape tissues, but VvGID1b transcript levels were significantly higher than VvGID1a. (5) In general, both VvDELLAs and VvGID1s transcripts levels increased as tissues aged. Unfertilized and recently fertilized carpels did not follow this trend, suggesting different regulatory mechanism of GA signaling in these stages. Characterization of the response to GA of various organs in three seedless cultivars revealed differential response of the berries and rachis. Interestingly, VvDELLA3 transcript levels in the GA-unresponsive berries of cv. Spring blush were significantly higher compared to their levels in the highly responsive berries of cv. Black finger. Assuming that VvDELLA2 and VvDELLA3 are regulating berry size, constructs carrying potential dominant mutations in each gene were created. Furthermore, constitutive silencing of these genes by mIR is underway, to reveal the effect of each gene on the berry phenotype.

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Ben-Tal, Yosef. Involvement of Different Gibberellins in Flowering of Biennial Bearing Fruit Trees. United States Department of Agriculture, novembre 1993. http://dx.doi.org/10.32747/1993.7603834.bard.

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Heffetz, Ori, e John List. Is the Endowment Effect a Reference Effect? Cambridge, MA: National Bureau of Economic Research, gennaio 2011. http://dx.doi.org/10.3386/w16715.

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Martindale, Addie K. Achromatizing Effect. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/itaa_proceedings-180814-227.

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Tambe, Milind, e Paul S. Rosenbloom. On Masking Effect. Fort Belvoir, VA: Defense Technical Information Center, luglio 1993. http://dx.doi.org/10.21236/ada269593.

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Glaeser, Edward, e Andrei Shleifer. The Curley Effect. Cambridge, MA: National Bureau of Economic Research, maggio 2002. http://dx.doi.org/10.3386/w8942.

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Seybold, Patricia. The Network Effect. Boston, MA: Patricia Seybold Group, febbraio 2003. http://dx.doi.org/10.1571/bp2-27-03cc.

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Inman, Robert. The Flypaper Effect. Cambridge, MA: National Bureau of Economic Research, dicembre 2008. http://dx.doi.org/10.3386/w14579.

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Rose, Andrew, e Mark Spiegel. The Olympic Effect. Cambridge, MA: National Bureau of Economic Research, aprile 2009. http://dx.doi.org/10.3386/w14854.

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