FLOURY ENDOSPERM15 encodes a glyoxalase I involved in compound granule formation and starch synthesis in rice endosperm

文献类型： 外文期刊

第一作者： You, Xiaoman

作者： You, Xiaoman;Zhang, Wenwei;Hu, Jinlong;Jing, Ruonan;Cai, Yue;Feng, Zhiming;Kong, Fei;Zhang, Jie;Yan, Haigang;Chen, Xingang;Ma, Jing;Tang, Xiaojie;Wang, Peng;Liu, Linglong;Jiang, Ling;Wan, Jianmin;Chen, Weiwei;Zhu, Shanshan;Wan, Jianmin

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关键词： Rice.endosperm; FLOURY; ENDOSPERM 15; Glyoxalase I; Starch synthesis.compound granule

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2019 年 38 卷 3 期

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收录情况： SCI

摘要： Key messageFLO15encodes a plastidic glyoxalase I protein, OsGLYI7, which affects compound starch granule formation and starch synthesis in rice endosperm.AbstractStarch synthesis in rice (Oryza sativa) endosperm is a sophisticated process, and its underlying molecular machinery still remains to be elucidated. Here, we identified and characterized two allelic rice floury endosperm 15 (flo15) mutants, both with a white-core endosperm. The flo15 grains were characterized by defects in compound starch granule development, along with decreased starch content. Map-based cloning of the flo15 mutants identified mutations in OsGLYI7, which encodes a glyoxalase I (GLYI) involved in methylglyoxal (MG) detoxification. The mutations of FLO15/OsGLYI7 resulted in increased MG content in flo15 developing endosperms. FLO15/OsGLYI7 localizes to the plastids, and the in vitro GLYI activity derived from flo15 was significantly decreased relative to the wild type. Moreover, the expression of starch synthesis-related genes was obviously altered in the flo15 mutants. These findings suggest that FLO15 plays an important role in compound starch granule formation and starch synthesis in rice endosperm.

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