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Showing 1 to 20 of 91 for “"Abscisic acid"”.
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Mode of Action of Abscisic Acid in Barley Aleurone Layers: Induction of Proteins by Abscisic Acid
Abscisic acid (ABA) induces at least 16 polypeptides in barley aleurone layers as determined by two-dimensional gel electrophoretic analysis. The induction seems to be at the mRNA level because the message levels of the induced proteins closely parallel the protein levels. None of the ABA-induced …
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Understanding grapevine responses to abscisic acid
Abscisic acid (ABA) regulates various developmental processes and stress responses over both short (i.e. hours or days) and longer (i.e. months or seasons) time frames. To elucidate the transcriptional regulatory the early responses of grapevine (Vitis vinifera) responding to ABA, different organs …
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Abscisic acid ameliorates glucose tolerance and obesity-induced inflammation
… laboratory sought out a natural phytochemical, abscisic acid (ABA), with chemical similarities to TZDs. Our first study demonstrated that ABA activates PPARgamma in vitro and significantly ameliorates white adipose tissue (WAT) inflammation and glucose tolerance in db/db mice. We next further …
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Stereocontrolled synthesis of plant growth regulators Abscisic acid and Xanthoxin
… synthesis of plant growth regulators related to abscisic acid (ABA). The biological activity of these plant growth regulators, ABA and Xanthoxin, and their derivatives is influenced by the stereochemistry of the double bond system in the side chain, the 2Z,4E-isomers being most potent.
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Structure and Mechanism of Hormone Perception and Signal Transduction by Abscisic Acid Receptors
Abscisic acid (ABA) is a vital plant hormone that confers abiotic stress tolerance. ABA acts through inhibition of certain members of the type 2C protein phosphatase (PP2C), resulting in activation of the SNF1-related kinases (SnRKs) that positively transduce the ABA signal. The identity of ABA …
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In silico identification of genes regulated by abscisic acid in Arabidopsis thaliana (L.) Heynh.
Abscisic acid (ABA) is a major plant hormone that plays an important role during plant growth and development. During vegetative growth ABA mediates (in part) responses to various environmental stresses such as cold, drought and high salinity. The response triggered by ABA includes changes in the …
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Function of abscisic acid in maintenance of maize primary root growth under water deficit
Previous studies suggested that ABA accumulation is required to maintain maize primary root elongation under water deficit and that one of the functions of ABA is to restrict ethylene evolution. These studies were conducted by using carotenoid deficient seedlings to induce ABA deficiency. Using the …
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Role of Fatty Acid omega-Hydroxylase 1 and Abscisic Acid in Potato Tuber Suberin Formation
… whereas the second domain is predominately fatty acid derivatives esterified with glycerol. Deposited in specialized cells during development or in response to abiotic stress, suberin functions as a barrier to water loss and pathogen attack. In potato, more than 65% of suberin monomers undergo …
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Abscisic acid : interactions with auxin in the regulation of root growth under water deficit conditions
… more than root growth (Sharp et al., 1988). Abscisic acid (ABA) has been shown to be involved in this differential growth response in maize (Zea mays L.) seedlings (Saab et al., 1990; Sharp et al., 1994). ABA accumulates in the elongation zone of the primary root at low water potentials, and …
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Influence of salicylate and abscisic acid on the resisitance of tomato to biotrophic and necrotrophic pathogens
… signalling. The plant defence hormone, Salicylic acid (SA), was tested for its role in the response of tomato and tobacco to a necrotroph, Botrytis cinerea and a biotroph, Oidium neolycopersici). In tomato the SA defence pathway activated both basal and induced resistance against B. cinerea but …
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Analysis of maturation-specific genes in soybean seeds: Gene structure, desiccation induction and abscisic acid responsiveness
… be induced by water stress and also by exogenous abscisic acid (ABA) application. Previous studies have identified a 31-kDa maturation polypeptide (MAT) which accumulates during normal and precocious maturation of soybean (Glycine max L. Merr) seeds, and disappears rapidly during germination. The …
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Soybean (Glycine max (L.) Merr.); nodulation mutant characterization: Role of isoflavonoid, nitrate, and abscisic acid in nodulation control
Isoflavonoids (daidzein, genistein, and coumestrol) are known to be inducers of nod genes in Bradyrhizobium japonicum. This study evaluated the effect of inoculation and nitrogen on isoflavonoid concentration in soybean (Glycine max (L.) Merr.) root extracts from selected hypernodulating mutants …
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HOOKLESS1 REGULATES RESPONSES TO PATHOGENS AND ABSCISIC ACID THROUGH INTERACTION WITH MEDIATOR18 AND ACETYLATION OF WRKY33 AND ABI5 CHROMATIN
Arabidopsis histone acetyltransferase HLS1 has been implicated in the control of seedling development in response to ethylene. Here, we demonstrate that the loss of function hls1 mutant plants have broad effects on the plant development such as early senescence and flowering, seed insensitivity to …
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A Critical Assessment of the Role of Abscisic Acid and Calcium Ions in Regulating Stomatal Movements in Commelina communis L.
… of stomatal opening in Commelina communis L. by abscisic acid (ABA) appeared to be dependent on the availability of calcium ions. Synergism between calcium ions and ABA in suppressing stomatal opening was observed, and a factorial experiment revealed a highly significant interaction between …
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Guard Cell Regulation of Stomatal Response: Chloroplast Function and Abscisic Acid Metabolism in Guard Cells of Commelina Communis and Vicia Faba
Techniques were evaluated for obtaining viable, purified guard cells by sonication of epidermal peels of Vicia faba L. and by treatment at pH 4 of epidermal peels of Commelina communis L. The guard cells were free of mesophyll cells and chloroplasts and of living epidermal cells as shown by …
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The role of abscisic acid in the defence response of tomato (Solanum lycopersicum) to the necrotrophic pathogens Botrytis cinerea and Erwinia chrysanthemi
… to the environment. The plant hormones salicylic acid (SA), jasmonate (JA) and ethylene (ET) are classically associated with plant pathogen defence responses as their increase in concentrations upon pathogen recognition, which leads to the activation of specific signalling cascades and pathogen …
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The effects of exogenous application of abscisic acid and α,α'-dipyridyl on cold acclimation and physical characteristics of Pisum sativum 'Alaska' seedlings
Cold acclimation entails changes in membrane composition, osmotic adjustment, alterations in the cell wall-plasma membrane interface, sugar deposition, and changes in cell wall proteins. There is evidence that a rigid cell wall may be necessary for cold acclimation. Difficulties arise in studying …
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