Rice AGL1 determines grain size and sterile lemma identity

文献类型： 外文期刊

第一作者： Yu, Haiping

作者： Yu, Haiping;Wang, An;Zhang, Guangheng;Dong, Guojun;Guo, Longbiao;Qian, Qian;Ren, Deyong;Zhang, Guangheng;Qian, Qian;Ren, Deyong;Zhang, Guangheng;Qian, Qian;Ren, Deyong

作者机构：

关键词： Abnormal grain and sterile lemma 1; Oryza sativa; Grain size; Rudimentary glume

期刊名称：CROP JOURNAL （ 影响因子：6.0； 五年影响因子：5.6 ）

ISSN： 2095-5421

年卷期： 2024 年 12 卷 2 期

页码：

收录情况： SCI

摘要： The grass spikelet is a unique inflorescence structure that determines grain size. Although many genetic factors have been well characterized for grain size and glume development, the underlying molecular mechanisms in rice are far from established. Here, we isolated rice gene, AGL1 that controlled grain size and determines the fate of the sterile lemma. Loss of function of AGL1 produced larger grains and reduced the size of the sterile lemma. Larger grains in the agl1 mutant were caused by a larger number of cells that were longer and wider than in the wild type. The sterile lemma in the mutant spikelet was converted to a rudimentary glume -like organ. Our findings showed that the AGL1 (also named LAX1) protein positively regulated G1 expression, and negatively regulated NSG1 expression, thereby affecting the fate of the sterile lemma. Taken together, our results revealed that AGL1 played a key role in negative regulation of grain size by controlling cell proliferation and expansion, and supported the opinion that rudimentary glume and sterile lemma in rice are homologous organs. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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