Control of seed size by jasmonate

文献类型： 外文期刊

第一作者： Hu, Shuai

作者： Hu, Shuai;Yang, Haitao;Gao, Hua;Yan, Jianbin;Xie, Daoxin;Yan, Jianbin

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关键词： jasmonate; seed size; integument; COI1; JAZ6

期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：4.611； 五年影响因子：3.547 ）

ISSN： 1674-7305

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收录情况： SCI

摘要： Seed size, an important agronomic trait determining crop yield, is regulated by multiple plant hormones. Jasmonate (JA) is a key phytohormone required for various plant defenses and diverse developmental processes. Here, we defined an essential role for JA in control of seed size. Through comprehensive analysis of genetic mutants in JA pathway, we showed that seed size was repressed by positive components in JA pathway including COI1, MYC2 (and its homologues), MED25 and JAR1, but promoted by JA signaling repressor JAZ proteins such as JAZ6. We further demonstrated that exogenous application of JA suppressed seed size in a COI1-dependent manner. Our results reveal that JA signaling represses seed size and negatively regulates integument cell proliferation. Elucidation of jasmonate action in seed size control would advance our understanding of inner mechanism of seed size regulation.

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