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
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
收藏
页码:1236 / 1241
页数:6
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