DDG1 and G Protein & alpha; Subunit RGA1 Interaction Regulates Plant Height and Senescence in Rice (Oryza sativa)
文献类型： 外文期刊
作者： Liu, Xi 1 ; Zhao, Chuxuan 2 ; Wang, Di 3 ; Pan, Gen 4 ; Ji, Xiaonan 2 ; Gao, Su 2 ; Du, Tanxiao 2 ; Feng, Yating 2 ; Chen, Wenjing 2 ;
作者机构： 1.Huaiyin Normal Univ, Reg Cooperat Innovat Ctr Modern Agr & Environm Pro, Jiangsu Key Lab Ecoagr Biotechnol Hongze Lake, Huaian 223300, Peoples R China
2.Huaiyin Normal Univ, Sch Life Sci, Huaian 223300, Peoples R China
3.Huaiyin Inst Agr Sci Xuhuai Reg Jiangsu, Crop Res & Dev Ctr, Huaian 223001, Peoples R China
4.Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Peoples R China
关键词： Oryza sativa; DDG1; plant height; senescence; RGA1
期刊名称：PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：1.7； 五年影响因子：1.4 ）
ISSN： 0031-9457
年卷期： 2023 年 92 卷 7 期
页码：
收录情况： SCI
摘要： Many studies have already shown that dwarfism and moderate delayed leaf senescence positively impact rice yield, but the underlying molecular mechanism of dwarfism and leaf senescence remains largely unknown. Here, using map-based cloning, we identified an allele of DEP2, DDG1, which controls plant height and leaf senescence in rice. The ddg1 mutant displayed dwarfism, short panicles, and delayed leaf senescence. Compared with the wild-type, ddg1 was insensitive to exogenous gibberellins (GA) and brassinolide (BR). DDG1 is expressed in var-ious organs, especially in stems and panicles. Yeast two-hybrid assay, bimolecular fluorescent complementation and luciferase complementation image assay showed that DDG1 interacts with the & alpha;-subunit of the heterotrimeric G protein. Disruption of RGA1 resulted in dwarfism, short panicles, and darker-green leaves. Furthermore, we found that ddg1 and the RGA1 mutant was more sensitive to salt treatment, suggesting that DDG1 and RGA1 are involved in regulating salt stress response in rice. Our results show that DDG1/DEP2 regulates plant height and leaf senescence through interacting with RGA1.
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