文献类型： 外文期刊
作者： Hu, Bin 2 ; Shen, Enlong 1 ; Zhou, Fengling 1 ; Sun, Bo 3 ; Wang, Xingchao 1 ; Zhou, Fei 1 ; Lin, Yongjun 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Ctr Plant Gene Res Wuhan, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Natl Key Lab Trop Crop Breeding, Minist Agr,Key Lab Biol & Genet Resources Rubber T, Haikou 571101, Peoples R China
3.Wuhan Towin Biotechnol Co Ltd, Wuhan 430070, Peoples R China
关键词： Cell death; IAA; OsBI-1; Senescence; Rice (Oryza sativa)
期刊名称：PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.1 ）
ISSN： 0168-9452
年卷期： 2024 年 349 卷
页码：
收录情况： SCI
摘要： Leaf senescence following heading in rice is subject to rigorous regulation, with many of the underlying control mechanisms remaining largely unknown. In this study, we identified a novel gene, OsMESL, , which exerts a positive regulatory effect on leaf senescence in rice. The T-DNA insertion mutant known as osmesl and RNA interference plants displayed a phenotype characterized by stay-green after heading. Genetic analysis indicated that the mutant phenotype could be rescued through complementation, while the overexpression of OsMESL accelerated leaf senescence after heading, underscoring OsMESL's positive regulatory role in rice leaf senescence. Subsequent investigations revealed that OsMESL modulates the process of cell death by influencing the stability of its interacting protein, the cell death suppressor OsBI-1, thereby governing leaf senescence. Furthermore, the leaves of the osmesl mutant exhibited a delayed reduction in photosynthesis, along with increased grain length and 1000-grain weight. In conclusion, we identified OsMESL as a novel positive regulator of leaf senescence in rice, which likely participates in leaf senescence through the mediation of cell death by OsBI-1, resulting in the phenotype of stay-green in the osmesl mutant after heading.
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