ZmGRAS11, transactivated by Opaque2, positively regulates kernel size in maize

文献类型： 外文期刊

第一作者： Li, Ye

作者： Li, Ye;Ma, Shuai;Zhao, Qianqian;Lv, Di;Wang, Baobao;Xiao, Ke;Zhu, Jiameng;Li, Suzhen;Yang, Wenzhu;Liu, Xiaoqing;Zhou, Xiaojin;Chen, Rumei;Li, Ye;Xiao, Ke;Zhu, Jiameng;Wang, Haiyang

作者机构：

关键词： DELLA-like; endosperm; kernel size; maize; Opaque2; seed weight

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.106； 五年影响因子：8.241 ）

ISSN： 1672-9072

年卷期： 2021 年 63 卷 12 期

页码：

收录情况： SCI

摘要： Although the genetic basis for endosperm development in maize (Zea mays) has been well studied, the mechanism for coordinating grain filling with increasing kernel size remains elusive. Here, we report that increased kernel size was selected during modern breeding and identify a novel DELLA-like transcriptional regulator, ZmGRAS11, which positively regulates kernel size and kernel weight in maize. We find that Opaque2, a core transcription factor for zein protein and starch accumulation, transactivates the expression of ZmGRAS11. Our data suggest that the Opaque2-ZmGRAS11 module mediates synergistic endosperm enlargement with grain filling.

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