Effects of shoot-applied gibberellin/gibberellin-biosynthesis inhibitors on root growth and expression of gibberellin biosynthesis genes in Arabidopsis thaliana.

IF 1 Q3 PLANT SCIENCES

Plant Root Pub Date : 2010-11-09 DOI:10.3117/PLANTROOT.4.4

Haniyeh Bidadi, Shinjiro Yamaguchi, M. Asahina, S. Satoh

引用次数: 32

Abstract

To elucidate the involvement of gibberellin (GA) in the growth regulation of Arabidopsis roots, effects of shoot-applied GA and GA-biosynthesis inhibitors on the root were examined. Applying GA to the shoot of Arabidopsis slightly enhanced the primary root elongation. Treating shoots with uniconazole, a GA biosynthesis inhibitor, also resulted in enhancement of primary root elongation, while shoots treated with uniconazole were stunted and bolting was delayed. Analysis of the expression of GA3ox and GA20ox confirmed the up-regulation of these genes in roots following the inhibitor application to shoots. The results suggest that the inhibition of GA-biosynthesis enhances the production of bioactive GAs in roots and promotes root elongation.

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芽施赤霉素/赤霉素生物合成抑制剂对拟南芥根系生长及赤霉素生物合成基因表达的影响

为了阐明赤霉素(giberellin, GA)在拟南芥根系生长调控中的作用，研究了外施赤霉素(giberellin, GA)和GA-生物合成抑制剂对拟南芥根系的影响。施用GA对拟南芥的主根伸长有轻微的促进作用。单唑唑(一种GA生物合成抑制剂)处理的幼苗初生根伸长也增加，而单唑唑处理的幼苗发育迟缓，抽苔延迟。对GA3ox和GA20ox基因的表达分析证实，施用抑制剂后，GA3ox和GA20ox基因在根中表达上调。结果表明，抑制ga生物合成可促进根内生物活性GAs的产生，促进根伸长。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant Root PLANT SCIENCES-

CiteScore

1.50

自引率

0.00%

发文量

期刊介绍： Plant Root publishes original papers, either theoretical or experimental, that provide novel insights into plant roots. The Journal’s subjects include, but are not restricted to, anatomy and morphology, cellular and molecular biology, biochemistry, physiology, interactions with soil, mineral nutrients, water, symbionts and pathogens, food culture, together with ecological, genetic and methodological aspects related to plant roots and rhizosphere. Work at any scale, from the molecular to the community level, is welcomed.