G-protein beta gamma subunits determine grain size through interaction with MADS-domain transcription factors in rice

文献类型： 外文期刊

第一作者： Liu, Qian

作者： Liu, Qian;Han, Ruixi;Wu, Kun;Zhang, Jianqing;Ye, Yafeng;Wang, Shuansuo;Chen, Jianfeng;Pan, Yajun;Li, Qi;Xu, Xiaopeng;Fu, Xiangdong;Han, Ruixi;Zhang, Jianqing;Chen, Jianfeng;Fu, Xiangdong;Han, Ruixi;Wu, Kun;Wu, Yuejin;Xu, Xiaopeng;Zhou, Jiawu;Tao, Dayun

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： The simultaneous improvement of grain quality and yield of cereal crops is a major challenge for modern agriculture. Here we show that a rice grain yield quantitative trait locus qLGY3 encodes a MADS-domain transcription factor OsMADS1, which acts as a key downstream effector of G-protein beta gamma dimers. The presence of an alternatively spliced protein OsMADS1(lgy3) is shown to be associated with formation of long and slender grains, resulting in increases in both grain quality and yield potential of rice. The G gamma subunits GS3 and DEP1 interact directly with the conserved keratin-like domain of MADS transcription factors, function as cofactors to enhance OsMADS1 transcriptional activity and promote the co-operative transactivation of common target genes, thereby regulating grain size and shape. We also demonstrate that combining OsMADS1(lgy3) allele with high-yield-associated dep1-1 and gs3 alleles represents an effective strategy for simultaneously improving both the productivity and end-use quality of rice.

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