文献类型： 外文期刊
作者： Zhao, Xinhui 1 ; Wei, Mengyi 3 ; Tang, Qianying 2 ; Tang, Lei 3 ; Fu, Jun 2 ; Wang, Kai 2 ; Zhou, Yanbiao 2 ; Yang, Yuanzhu 1 ;
作者机构： 1.Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China
2.Yuan Longping High Tech Agr Co Ltd, Key Lab Southern Rice Innovat & Improvement, Hunan Engn Lab Dis & Pest Resistant Rice Breeding, Minist Agr & Rural Affairs, Changsha 410001, Peoples R China
3.Hunan Normal Univ, Coll Life Sci, Changsha 410081, Peoples R China
4.Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China
5.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
6.Shanghai Jiao Tong Univ, Shanghai Collaborat Innovat Ctr Agriseeds, Sch Agr & Biol, Shanghai 200240, Peoples R China
关键词： glum-opening; lodicule; anthesis; jasmonic acid; carbohydrate; rice
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Glume-opening of thermosensitive genic male sterile (TGMS) rice (Oryza sativa L.) lines after anthesis is a serious problem that significantly reduces the yield and quality of hybrid seeds. However, the molecular mechanisms regulating the opening and closing of rice glumes remain largely unclear. In this study, we report the isolation and functional characterization of a glum-opening mutant after anthesis, named gom1. gom1 exhibits dysfunctional lodicules that lead to open glumes following anthesis. Map-based cloning and subsequent complementation tests confirmed that GOM1 encodes a receptor-like kinase (RLK). GOM1 was expressed in nearly all floral tissues, with the highest expression in the lodicule. Loss-of-function of GOM1 resulted in a decrease in the expression of genes related to JA biosynthesis, JA signaling, and sugar transport. Compared with LK638S, the JA content in the gom1 mutant was significantly reduced, while the soluble sugar, sucrose, glucose, and fructose contents were significantly increased in lodicules after anthesis. Together, we speculated that GOM1 regulates carbohydrate transport in lodicules during anthesis through JA and JA signaling, maintaining a higher osmolality in lodicules after anthesis, which leads to glum-opening.
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