Jasmonic acid regulates spikelet development in rice

被引：326

作者：

Cai, Qiang ^{[1
]}

Yuan, Zheng ^{[1
]}

Chen, Mingjiao ^{[1
]}

Yin, Changsong ^{[1
]}

Luo, Zhijing ^{[1
]}

Zhao, Xiangxiang ^{[2
]}

Liang, Wanqi ^{[1
]}

Hu, Jianping ^{[3
]}

Zhang, Dabing ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, State Key Lab Hybrid Rice, Shanghai 200240, Peoples R China

[2] Huaiyin Normal Univ, Jiangsu Key Lab Ecoagr Biotechnol Hongze Lake, Huian 223300, Jiangsu, Peoples R China

[3] Michigan State Univ, Dept Energy, Plant Res Lab, E Lansing, MI 48824 USA

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

中国国家自然科学基金;

关键词：

FLORAL HOMEOTIC GENES; MADS BOX GENE; MERISTEM IDENTITY; INFLORESCENCE ARCHITECTURE; DEFENSE RESPONSES; PROTEIN; ORGAN; FATE; BIOSYNTHESIS; CORONATINE;

D O I：

10.1038/ncomms4476

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

The spikelet is the basal unit of inflorescence in grasses, and its formation is crucial for reproductive success and cereal yield. Here, we report a previously unknown role of the plant hormone jasmonic acid (JA) in determining rice (Oryza sativa) spikelet morphogenesis. The extra glume 1 (eg1) and eg2 mutants exhibit altered spikelet morphology with changed floral organ identity and number, as well as defective floral meristem determinacy. We show that EG1 is a plastid-targeted lipase that participates in JA biosynthesis, and EG2/OsJAZ1 is a JA signalling repressor that interacts with a putative JA receptor, OsCOI1b, to trigger OsJAZ1's degradation during spikelet development. OsJAZ1 also interacts with OsMYC2, a transcription factor in the JA signalling pathway, and represses OsMYC2's role in activating OsMADS1, an E-class gene crucial to the spikelet development. This work discovers a key regulatory mechanism of grass spikelet development and suggests that the role of JA in reproduction has diversified during the flowering plant evolution.

引用

页数：13

共 64 条

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Acosta Ivan F, 2010, Arabidopsis Book, V8, pe0129, DOI 10.1199/tab.0129

[2]

tasselseed1 Is a Lipoxygenase Affecting Jasmonic Acid Signaling in Sex Determination of Maize [J].