Topic
Zeatin
About: Zeatin is a research topic. Over the lifetime, 2467 publications have been published within this topic receiving 64092 citations. The topic is also known as: Zeatin & (E/Z)-zeatin.
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TL;DR: In this article, a method for purification of Zeatin and zeatin riboside from plant extracts for quantification by high-performance liquid chromatography (HPLC) is described.
7 citations
TL;DR: In this article, a novel synthetic pathway to trans-4-amino-1-hydroxy-2-methyl-2butene (7), a useful synthetic intermediate of zeatin, is presented.
Abstract: A novel synthetic pathway to trans-4-amino-1-hydroxy-2-methyl-2-butene (7), a useful synthetic intermediate of zeatin, is presented here. On selective monophthalimide formation, the trans-1, 4-dibromo-2-methyl-2-butene (10) prepared from isoprene (1) predominantly gives trans-1-bromo-2-methyl-4-phthalimido-2-butene (11). The compound (11) is converted to 7 via trans-1-acetoxy-2-methyl-4-phthalimido-2-butene (6). The overall yield of 7 from 1 is 33.6%. Base-catalyzed hydrolysis of 11 also gives 7 directly. Zeatin can be prepared by the condensation of 7 with 6-chloropurine.
7 citations
TL;DR: RNA-Seq and qRT-PCR analyses of rooted lateral bud cuttings indicated that the relative expression levels of the genes for zeatin O-glucosyltransferase-like, auxin repressed/dormancy-associated protein, and ERF transcription factors were higher in transgenic tomatoes than in WT, suggesting that ethylene may regulate auxin transport and distribution in shoots and that adventitious root formation employs coordination between auxin and ethylene.
7 citations
TL;DR: The data point to a relationship between the ed*41 mutation, inadequate vascular connection and disrupted hormone translocation affecting development of the shoot apical meristem of maize.
Abstract: The distribution of cytokinins is strongly altered in seedlings of the shootless ed*41 mutant of maize (Zea mays L), compared with wild-type Immunolocalisation of zeatin and analysis of cytokinin levels clearly indicate that these hormones are not present in the shoot apex zone of the mutant Since an anomalous differentiation of vascular tissues has also been observed in the mutant, a major role of vascular connection in hormone translocation affecting development of the shoot apical meristem is proposed Immunolocalisation of zeatin was confined to the root cap, cortex and vascular tissues of both mutant and wild-type seedlings suggesting a tissue-specific synthesis of this hormone in the root A time-course of cytokinin distribution in the wild-type developing shoot provided evidence that the tunica and corpus zones become competent to respond to cytokinins in subsequent periods, very probably in conjunction with photomorphogenesis On the contrary, this pathway is totally disrupted in the mutant Taken together, the data point to a relationship between the ed*41 mutation, inadequate vascular connection and disrupted hormone translocation
7 citations
TL;DR: In this paper, pyruvaldehyde dimethylacetal and acetonitrile in the presence of sodium methoxide, followed by acid hydrolysis to give 58% overall yield on distillation.
Abstract: (E)-3-Formylbut-2-enenitrile (4) is synthesized in 2 steps by reacting pyruvaldehyde dimethylacetal and acetonitrile in the presence of sodium methoxide, followed by acid hydrolysis to give 58% overall yield on distillation. The aldehyde4 can be stepwise and selectively reduced to (E)-3-hydroxymethylbut-2-enylamine (7a) in 37% total yield or exhaustivelyb reduced in 1 step to (±)-4-hydroxy-3-methylbutylamine (6) in 46% total yield. Compound7a and6 can be condensed with 6-chloropurine to give zeatin and (±)dihydrozeatin respectively. This provides a readily accessible method for isotope-labelled zeatin and its derivatives at side chain.
7 citations