Cytokinin biosynthesis and regulation
WebJan 5, 2024 · Authors: Mahboobeh Azarakhsh and Maria A. Lebedeva. Journal of Plant Growth Regulation (2024) Abstract: "Nodules are formed as a result of symbiosis with nitrogen-fixing bacteria on the roots of legume plants. Symbiotic nodule development shares common developmental processes with lateral roots... WebNov 28, 2024 · Scheme of cytokinin metabolism and signalling. As a first step of CK synthesis, iP nucleotides are formed by IPT enzymes. ... Regulation of IPT genes in salinity-stressed Arabidopsis wild-type plants led to a reduction of the CK concentration (Nishiyama et al., 2011). CK-deficient plants were more tolerant to salinity stress than …
Cytokinin biosynthesis and regulation
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WebThe effects of auxin and cytokinin on the mRNA of every AtIPT in roots were examined by RT-PCR. AtIPT5 and AtIPT7 were upregulated by auxin, suggesting an auxin regulation of cytokinin biosynthesis. All the genes for ATP/ADP isopentenyltransferases that were detectable in roots were downregulated by cytokinin, indicating a feedback regulation. WebMolecular Regulation and Evolution of Cytokinin Signaling in Plant Abiotic Stresses ... Here, we summarize the molecular mechanisms on the biosynthesis, metabolism, transport and signaling transduction pathways of CKs. CKs act as negative regulators of both root system architecture plasticity and root sodium exclusion in response to salt stress.
WebJan 6, 2024 · Biochemical analysis revealed that ARABIDOPSIS RESPONSE REGULATOR10 (PtARR10), one of the type-B ARR transcription factors in the cytokinin … WebMar 26, 2024 · Cytokinins are plant hormones that typically block or delay leaf senescence. We profiled 34 different cytokinins/cytokinin metabolites (including precursors, conjugates and degradation products) in leaves of a free-growing mature aspen (Populus tremula) before and after the initiation of autumnal senescence over three consecutive years. The …
WebThe upregulation by nitrate did not require de novo protein synthesis. We also examined the expression of two genes for tRNA isopentenyltransferases, AtIPT2 and AtIPT9, which can also be involved in cytokinin biosynthesis. They were expressed ubiquitously, with highest expression in proliferating tissues. Webcytokinin, any of a number of plant hormones that influence growth and the stimulation of cell division. Cytokinins are synthesized in the roots and are usually derived from …
WebJan 1, 2012 · Table 7.1 Important genes involved in cytokinin regulation and metabolism isolated in Arabidopsis. Full size table. 7.1.5 Future Direction. Our current knowledge about cytokinin metabolism is derived chiefly from methods used for cytokinin extraction, identification, and characterization of involved enzymes. Gas chromatography and mass ...
WebFeb 10, 2024 · Cytokinin double-receptor mutants were more susceptible to B. cinerea infection, whereas an exogenous CK treatment enhanced the expression levels of … foam padding clothesWebCytokinins (CKs) play a crucial role in various phases of plant growth and development, but the basic molecular mechanisms of their biosynthesis and signal transduction only … foam padding chattanooga tnWebNov 11, 2024 · We found cytokinin biosynthesis is a central integrator, balancing nitrate signalling with symbiotic acquired nitrogen. ... N., Kojima, M. & Sakakibara, H. Nitrogen-dependent regulation of de novo ... greenwood forest wildlife management areaWebJun 1, 2024 · In plants, cytokinins are essential regulators that are involved in almost every aspect of plant growth and development. During the various stages of leaf … greenwood forest park north walesWebJan 1, 2005 · Regulation of Cytokinin Biosynthesis in Higher Plants A. Regulation by Plant Hormones The expression of IPT, CKX, and CYP735As is coordinately or … greenwood forest subdivision 77066WebSep 7, 2010 · Induction of IAA Biosynthesis by Cytokinin. (A) The de novo IAA biosynthesis rate was analyzed in specific tissues after incubation of 10 DAG Arabidopsis seedlings in a medium containing 30% 2 H 2 O. Seedlings were divided into (a) apex and young developing leaves (leaf 3 and smaller), (b) the first two true leaves, and (c) the … foam padding for backpacksWebMar 30, 2006 · Regulation of cytokinin biosynthesis in higher plants. The steady-state level of cytokinin nucleobases, which is responsible for cytokinin activity, appears to be tightly controlled by the expression of key genes for … foam padding at home depot