An Arabidopsis GH3 gene, encoding an auxin-conjugating enzyme, mediates phytochrome B-regulated light signals in hypocotyl growth

被引：59

作者：

Park, Jung-Eun ^{[1
]}

Seo, Pil Joon ^{[1
]}

Lee, An-Kyo ^{[1
]}

Jung, Jae-Hoon ^{[1
]}

Kim, Youn-Sung ^{[1
]}

Park, Chung-Mo ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Chem, Seoul 151742, South Korea

来源：

PLANT AND CELL PHYSIOLOGY | 2007年 / 48卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

auxin; GH3; hypocotyl growth; light signaling; phytochrome B;

D O I：

10.1093/pcp/pcm086

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

An Arabidopsis GH3 gene WES1 encodes an auxin-conjugating enzyme that plays a role in stress responses by modulating endogenous levels of active auxin through a negative feedback regulation. Here, we report a photomorphogenic role for WES1 in hypocotyl growth. Hypocotyls of the WES1-overexpressing wes1-D and the knockout wes1 mutants were similar to control hypocotyls in darkness. However, the wes1-D hypocotyls were significantly shorter but the wes1 hypocotyls were longer than control hypocotyls under red light. Accordingly, WES1 transcription was up-regulated in a phytochrome B mutant. These results provide support for WES1 regulating hypocotyl growth by mediating phytochrome B-perceived light signals.

引用

页码：1236 / 1241

页数：6

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