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https://hdl.handle.net/2440/92641
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Type: | Journal article |
Title: | Jasmonic acid regulates spikelet development in rice |
Author: | Cai, Q. Yuan, Z. Chen, M. Yin, C. Luo, Z. Zhao, X. Liang, W. Hu, J. Zhang, D. |
Citation: | Nature Communications, 2014; 5(1):3476-1-3476-13 |
Publisher: | Nature Publishing Group |
Issue Date: | 2014 |
ISSN: | 2041-1723 2041-1723 |
Statement of Responsibility: | Qiang Cai, Zheng Yuan, Mingjiao Chen, Changsong Yin, Zhijing Luo, Xiangxiang Zhao, Wanqi Liang, Jianping Hu and Dabing Zhang |
Abstract: | 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. |
Keywords: | Oryza sativa |
Description: | Published 19 March 2014 |
Rights: | © 2014 Macmillan Publishers Limited. All rights reserved. |
DOI: | 10.1038/ncomms4476 |
Published version: | http://dx.doi.org/10.1038/ncomms4476 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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