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dhd4,a CONSTANS-like family transcription factor,delays heading date by affecting the formation of the FAC complex in rice

引用

Molecular Plant 2021年第2期14卷 330-343页

作者： Maohong Cai Shanshan Zhu Mingming Wu Xiaoming Zheng Jiachang Wang Liang Zhou Tianhui Zheng Song Cui Shirong Zhou Chaonan Li Huan Zhang Juntao Chai Xinyue Zhang Xin Jin Zhijun Cheng Xin Zhang Cailin Lei Yulong Ren Qibing Lin Xiuping Guo Lei Zhao Jie Wang Zhichao Zhao Ling Jiang Haiyang Wang Jianmin Wan National Key Facility for Crop Gene Resources end Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for Crop Genetics and Germplasm Enhancement Jiangsu Plant Gene Engineering Research CenterNanjing Agricultural UniversityNanjing210095China

Heading date(or flowering time)is one of the most important agronomic traits in rice,influencing its regional adaptability and crop *** major-effect genes for rice heading date have been identified,but in practice they are difficult to be used for rice molecular breeding because of their dramatic effects on heading *** with minor effects on heading date,which are more desirable for fine-tuning flowering time without significant yield penalty,were seldom *** this study,we identified a new minor-effect heading date repressor,Delayed Heading Date 4(dhd4).The dhd4 mutant shows a slightly earlier flowering phenotype without a notable yield penalty compared with wild-type plants under natural long-day ***4 encodes a CONSTANS-like transcription factor localized in the ***,biochemical,and genetic assays show that dhd4 can compete with 14-3-3 to interact with OsFD1,thus affecting the formation of the Hd3a-14-3-3-OsFD1 triprotein FAC complex,resulting in reduced expression of OsMADS14 and OsMADS15,and ultimately delaying *** together,these results shed new light on the regulation of flowering time in rice and provide a promising target for fine-tuning flowering time to improve the regional adaptability of rice.

关键词： rice Oryza sativa delayed heading date 4 dhd4 minor-effect OsFD1 heading date

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