Regulation of abscisic acid metabolism: towards a metabolic basis for abscisic acid-cytokinin antagonism
نویسندگان
چکیده
منابع مشابه
Role of Cytokinin/Abscisic Acid Balance
Temperature stress during kernel development affects maize (Zea mays 1.) grain growth and yield stability. Maize kernels (hybrid A619 x W64A) were cultured in vitro at 3 d after pollination and either maintained at 25°C or transferred to 35'C for 4 or 8 d, then returned to 25'C until physiological maturity. Kernel fresh and dry matter accumulation was severely disrupted by the long-term heat st...
متن کاملAnalysis of cytokinin mutants and regulation of cytokinin metabolic genes reveals important regulatory roles of cytokinins in drought, salt and abscisic acid responses, and abscisic acid biosynthesis.
Cytokinins (CKs) regulate plant growth and development via a complex network of CK signaling. Here, we perform functional analyses with CK-deficient plants to provide direct evidence that CKs negatively regulate salt and drought stress signaling. All CK-deficient plants with reduced levels of various CKs exhibited a strong stress-tolerant phenotype that was associated with increased cell membra...
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Plant growth and development are regulated by internal signals and by external environmental conditions. One important regulator that coordinates growth and development with responses to the environment is the sesquiterpenoid hormone abscisic acid (ABA). ABA plays important roles in many cellular processes including seed development, dormancy, germination, vegetative growth, and environmental s...
متن کاملAbscisic acid coordinates nod factor and cytokinin signaling during the regulation of nodulation in Medicago truncatula.
Nodulation is tightly regulated in legumes to ensure appropriate levels of nitrogen fixation without excessive depletion of carbon reserves. This balance is maintained by intimately linking nodulation and its regulation with plant hormones. It has previously been shown that ethylene and jasmonic acid (JA) are able to regulate nodulation and Nod factor signal transduction. Here, we characterize ...
متن کاملAbscisic Acid Signal Transduction.
The plant hormone abscisic acid (ABA) plays a major role in seed maturation and germination, as well as in adaptation to abiotic environmental stresses. ABA promotes stomatal closure by rapidly altering ion fluxes in guard cells. Other ABA actions involve modifications of gene expression, and the analysis of ABA-responsive promoters has revealed a diversity of potential cis-acting regulatory el...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 1999
ISSN: 1460-2431
DOI: 10.1093/jexbot/50.334.595