Levels of cytokinins in the ovules of cotton mutants with altered fiber development

文献类型： 外文期刊

第一作者： Chen, JG

作者： Chen, JG;Du, XM;Zhou, X;Zhao, HY

作者机构：

关键词： cotton fiber;cytokinin;abscisic acid;cotton ovule;mutant

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）

ISSN： 0721-7595

年卷期： 1997 年 16 卷 3 期

页码：

收录情况： SCI

摘要： Endogenous levels of cytokinin and abscisic acid (ABA) were determined in ovules of normal cotton (TM-1) and four fiber differentiation mutants (n2, Ligon lintless, H10, and Xu142) before and after flowering by enzyme-linked immunosorbent assays. The fluctuation patterns of ABA levels in ovules of normal cotton and mutants were similar. At the fiber elongation stage, ABA content was low, and from 1 day after flowering, the ABA content decreased steadily. On the other hand, the peaks of isopentenyladenine and isopentenyladenosine in ovules of TM-1 were observed 1 day before flowering. The level of cytokinins decreased after flowering in TM-1, whereas in the mutants it increased steadily. These results indicate that endogenous ABA is probably not the main inhibitor for fiber elongation and that endogenous cytokinins likely play a dual role in fiber development. Before flowering, cytokinins function as one of the stimuli for the initiation of fibers, but after flowering, cytokinins inhibit fiber growth.

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