The bHLH Transcription Factor MYC3 Interacts with the Jasmonate ZIM-Domain Proteins to Mediate Jasmonate Response in Arabidopsis

The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription factor MYC2 was found to interact with JAZs and mediate JA responses including JA-inhi...

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Bibliographic Details
Published in分子植物 Vol. 4; no. 2; pp. 279 - 288
Main Author Zhiwei Cheng Li Sun Tiancong Qi Bosen Zhang Wen Peng Yule Liu Daoxin Xie
Format Journal Article
LanguageChinese
Published 2011
Subjects
拟南芥
植株表现
植物生长发育
相互作用模式
茉莉
蛋白
调解
转录因子
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Summary:The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription factor MYC2 was found to interact with JAZs and mediate JA responses including JA-inhibitory root growth. Here, we identified another bHLH transcription factor MYC3 which directly interacted with JAZs by virtue of its N-terminal region to regulate JA responses. The transgenic plants with overexpression of MYC3 exhibited hypersensitivity in JA-inhibitory root elon- gation and seedling development. The JAZ-interacting pattern and the JA-induced expression pattern of MYC3 were distinguishable from those of MYC2. We speculate that MYC3 and MYC2 may have redundant but also distinguishable functions in regulation of JA responses.
Bibliography:31-2013/Q
The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription factor MYC2 was found to interact with JAZs and mediate JA responses including JA-inhibitory root growth. Here, we identified another bHLH transcription factor MYC3 which directly interacted with JAZs by virtue of its N-terminal region to regulate JA responses. The transgenic plants with overexpression of MYC3 exhibited hypersensitivity in JA-inhibitory root elon- gation and seedling development. The JAZ-interacting pattern and the JA-induced expression pattern of MYC3 were distinguishable from those of MYC2. We speculate that MYC3 and MYC2 may have redundant but also distinguishable functions in regulation of JA responses.
MYC3; JAZ; COI1; Jasmonate.
ISSN:1674-2052
1752-9867