The Jasmonate-ZIM-Domain Proteins Interact with the WD-Repeat/bHLH/MYB Complexes to Regulate Jasmonate-Mediated Anthocyanin Accumulation and Trichome Initiation in Arabidopsis thaliana

被引：790

作者：

Qi, Tiancong ^{[1
]}

Song, Susheng ^{[1
]}

Ren, Qingcuo ^{[1
]}

Wu, Dewei ^{[1
]}

Huang, Huang ^{[1
]}

Chen, Yan ^{[2
]}

Fan, Meng ^{[1
]}

Peng, Wen ^{[1
]}

Ren, Chunmei ^{[2
]}

Xie, Daoxin ^{[1
,3
]}

机构：

[1] Tsinghua Univ, Sch Life Sci, Beijing 100084, Peoples R China

[2] Hunan Agr Univ, Coll Biosci & Biotechnol, Crop Gene Engn Key Lab Hunan Prov, Changsha 410128, Hunan, Peoples R China

[3] Tsinghua Univ, MOE Key Lab Bioinformat, Beijing 100084, Peoples R China

来源：

PLANT CELL | 2011年 / 23卷 / 05期

基金：

美国国家科学基金会;

关键词：

BHLH TRANSCRIPTION FACTORS; SUCROSE-SPECIFIC INDUCTION; EPIDERMAL-CELL FATE; METHYL JASMONATE; FLAVONOID BIOSYNTHESIS; GENE-EXPRESSION; DEFENSE RESPONSES; WOUND RESPONSE; PLANT DEFENSE; JAZ PROTEINS;

D O I：

10.1105/tpc.111.083261

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：

Jasmonates (JAs) mediate plant responses to insect attack, wounding, pathogen infection, stress, and UV damage and regulate plant fertility, anthocyanin accumulation, trichome formation, and many other plant developmental processes. Arabidopsis thaliana Jasmonate ZIM-domain (JAZ) proteins, substrates of the CORONATINE INSENSITIVE1 (COI1)-based SCFCOI1 complex, negatively regulate these plant responses. Little is known about the molecular mechanism for JA regulation of anthocyanin accumulation and trichome initiation. In this study, we revealed that JAZ proteins interact with bHLH (Transparent Testa8, Glabra3 [GL3], and Enhancer of Glabra3 [EGL3]) and R2R3 MYB transcription factors (MYB75 and Glabra1), essential components of WD-repeat/bHLH/MYB transcriptional complexes, to repress JA-regulated anthocyanin accumulation and trichome initiation. Genetic and physiological evidence showed that JA regulates WD-repeat/bHLH/MYB complex-mediated anthocyanin accumulation and trichome initiation in a COI1-dependent manner. Overexpression of the MYB transcription factor MYB75 and bHLH factors (GL3 and EGL3) restored anthocyanin accumulation and trichome initiation in the coi1 mutant, respectively. We speculate that the JA-induced degradation of JAZ proteins abolishes the interactions of JAZ proteins with bHLH and MYB factors, allowing the transcriptional function of WD-repeat/bHLH/MYB complexes, which subsequently activate respective downstream signal cascades to modulate anthocyanin accumulation and trichome initiation.

引用

页码：1795 / 1814

页数：20

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