WebNational Center for Biotechnology Information WebOct 4, 2024 · As cytokinin is a key regulator for the maintenance of shoot apical meristem, deepening our understanding of the regulatory mechanisms of cytokinin biosynthesis and transport in response to …
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WebApr 9, 2024 · In conclusion, our study shows that the ‘PbrARF13-PbrNSC-PbrMYB132’ regulatory cascade mediates the biosynthesis of lignin and cellulose in stone cells of pear fruit in response to auxin signals and also provides new insights into plant SCW formation. Conflict of interest. Cytokinins (CK) are a class of plant hormones that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence. There are two types of cytokinins: adenine-type … See more The idea of specific substances required for cell division to occur in plants actually dates back to the German physiologist J. Wiesner, who, in 1892, proposed that initiation of cell division is evoked by endogenous … See more Cytokinins are involved in many plant processes, including cell division and shoot and root morphogenesis. They are known to regulate axillary bud growth and apical dominance. … See more Adenosine phosphate-isopentenyltransferase (IPT) catalyses the first reaction in the biosynthesis of isoprene cytokinins. It may use ATP, ADP, or AMP as substrates and … See more • Agrares Fertilizer with cytokinins • Lincoln T, Zeiger E (2010). "Ch. 21: Cytokinins: Regulators of Cell Division". Plant Physiology (5th … See more Cytokinin signaling in plants is mediated by a two-component phosphorelay. This pathway is initiated by cytokinin binding to a histidine kinase receptor in the endoplasmic reticulum membrane. This results in the autophosphorylation of the receptor, with the … See more Because cytokinins promote plant cell division and growth, they have been studied since the 1970s as potential agrochemicals, however they have yet to be widely adopted, probably due to the complex nature of their effects. One study found that applying … See more
WebBiosynthesis of Cytokinins: Two mechanisms have been proposed for cytokinin biosynthesis, one leading to tRNA cytokinins and the other to free cytokinins. … WebJan 9, 2024 · Cytokinin levels within a cell depend on their biosynthesis and catabolism (Figure 1A). The first step of cytokinin biosynthesis is catalyzed by enzymes encoded …
WebMay 1, 2011 · Isopentenyl transferases—the first step in cytokinin biosynthesis The key biosynthetic and metabolic pathways of cytokinins are summarized in Fig. 1. The … WebApr 29, 2003 · Cytokinins are adenine derivatives with an isoprenoid side chain and play an essential role in plant development. Plant isopentenyltransferases that catalyze the first and rate-limiting steps of …
WebCytokinins (CKs) are a complex group of compounds. The complexity of CKs is not just present at the level of chemical structures, but as a family of compounds. CKs occur in plants as nucleotides, nucleosides (ribosides) that are produced during de novo biosynthesis, free bases, and conjugates that are in stored/inactivated forms. Almost all …
Webcytokinin biosynthesis in transgenic Arabidopsis, expressing the ipt gene under the control of a glucocorticoid inducible transcription system (21, 22). This system recently was shown to cause growth defects in transgenic A. thaliana plants grown in inductive condi-tions for 1–2 weeks (23). However, our investigation is based solely t and k gearWebDec 12, 2000 · The iPMP-dependent cytokinin biosynthesis pathway (Fig. 7, black arrows) has been extensively studied in tissues expressing the ipt gene from A. tumefaciens, … t and k fireWebAuxin and cytokinin interaction needs coordination in their signaling, biosynthesis and transport mechanisms. Auxin signaling is mediated through auxin-dependent degradation of the AUX/IAA (auxin/indole-3- acetic acid) proteins, the negative regulators of … t and k day care latrobe paWebDec 12, 2000 · The primary events of cytokinin biosynthesis generally are thought to be formation of iPMP by conjugation of a 2-isopentenyl hydrocarbon chain to the N 6 of AMP ( 9, 10, 28 ), followed by rapid, stereo-specific hydroxylation of the … t and k home medical scottsville kyWebNov 11, 2024 · Rhizobia-induced cytokinin biosynthesis is inhibited by nitrate. In response to rhizobia, L. japonicus induces the expression of cytokinin biosynthesis genes, including Ipt2; Log1; and Log4, to ... t and k logoWebAug 2, 2024 · The GA biosynthesis gene CsGA20ox1 was found to be a negative regulator for fruit spine development and act as a potential downstream gene of CsGL1 (Li et al., 2015). Despite of its importance in cucumber breeding and production, the genetic and regulatory mechanisms of wart formation are very limited. t and k hardware bean station tnWebApr 11, 2024 · Consistent with the results, the expression of the cytokinin biosynthesis-related IPT gene was downregulated, and cytokinin tZR levels were reduced in Zn-depleted quinoa roots (Fig. 4). Taken together, these results indicated that Zn homeostasis regulates plant growth by modulating both auxin and cytokinin levels in quinoa (Fig. 4, Fig. 5). t and k meat market eastlakes nsw