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- W1993797013 abstract "Abstract cis-Zeatin (cZ) is generally regarded as a cytokinin with little or no activity, compared with the highly active trans-zeatin (tZ). Although recent studies suggested possible roles for cZ, its physiological significance remains unclear. In our studies with rice (Oryza sativa), cZ inhibited seminal root elongation and up-regulated cytokinin-inducible genes, and its activities were comparable to those of tZ. Tracer experiments showed that exogenously supplied cZ-riboside was mainly converted into cZ derivatives but scarcely into tZ derivatives, indicating that isomerizations of cZ derivatives into tZ derivatives are a minor pathway in rice cytokinin metabolism. We identified three putative cZ-O-glucosyltransferases (cZOGT1, cZOGT2, and cZOGT3) in rice. The cZOGTs preferentially catalyzed O-glucosylation of cZ and cZ-riboside rather than tZ and tZ-riboside in vitro. Transgenic rice lines ectopically overexpressing the cZOGT1 and cZOGT2 genes exhibited short-shoot phenotypes, delay of leaf senescence, and decrease in crown root number, while cZOGT3 overexpressor lines did not show shortened shoots. These results propose that cZ activity has a physiological impact on the growth and development of rice." @default.
- W1993797013 created "2016-06-24" @default.
- W1993797013 creator A5014494327 @default.
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- W1993797013 creator A5028242707 @default.
- W1993797013 creator A5071776513 @default.
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- W1993797013 date "2012-07-17" @default.
- W1993797013 modified "2023-10-17" @default.
- W1993797013 title "Cytokinin Activity of cis-Zeatin and Phenotypic Alterations Induced by Overexpression of Putative cis-Zeatin-<i>O</i>-glucosyltransferase in Rice " @default.
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- W1993797013 doi "https://doi.org/10.1104/pp.112.196733" @default.
- W1993797013 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3440209" @default.
- W1993797013 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22811434" @default.
- W1993797013 hasPublicationYear "2012" @default.
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