期刊
PLANT AND CELL PHYSIOLOGY
卷 41, 期 8, 页码 932-939出版社
JAPANESE SOC PLANT PHYSIOLOGISTS
DOI: 10.1093/pcp/pcd018
关键词
cortical microtubule; gibberellin; Lemna minor; root elongation; uniconazole-P; taxol
Hormonal control of elongation growth was analyzed in segments excised from the elongation zone of Lemna roots. Exogenous GA(3) did not promote the segment elongation but rather inhibited it. Uniconazole-P, a gibberellin biosynthesis inhibitor, significantly inhibited the segment elongation, and the inhibitory effect was completely nullified by GA(3). In the epidermis, cell elongation was inhibited, but lateral cell expansion was not affected by uniconazole-P. Orientation of cortical microtubules of epidermal cells was disturbed by treatment with uniconazole-P for 12 h, and the disorganization of cortical microtubules was ameliorated by GA(3). These findings suggested that disorganization of cortical microtubules induced inhibition of elongation growth of root. However, stabilization of cortical microtubules by taxol, a microtubule-stabilizing agent, did not affect the inhibition of segment elongation by uniconazole-P. These results suggested that endogenous gibberellin controls the elongation growth of root by regulating cell elongation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据