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

被引:224
作者
Cheng, Zhiwei [1 ]
Sun, Li [1 ]
Qi, Tiancong [1 ]
Zhang, Bosen [1 ]
Peng, Wen [1 ]
Liu, Yule [1 ]
Xie, Daoxin [1 ]
机构
[1] Tsinghua Univ, MOE Key Lab Prot Sci, Sch Life Sci, Beijing 100084, Peoples R China
关键词
MYC3; JAZ; COI1; Jasmonate; GENE-EXPRESSION; SALICYLIC-ACID; SIGNALING PATHWAYS; DEFENSE RESPONSES; REGULATED DEFENSE; METHYL JASMONATE; ABSCISIC-ACID; MALE-STERILE; FLORAL DIP; CELL-DEATH;
D O I
10.1093/mp/ssq073
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The Arabidopsis Jasmonate ZIM-domain proteins (JAZs) act as substrates of SCFCOI1 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 elongation 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.
引用
收藏
页码:279 / 288
页数:10
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