OsmiR167a-targeted auxin response factors modulate tiller angle via fine-tuning auxin distribution in rice
文献类型： 外文期刊
作者： Li, Yan 1 ; Li, Jiali 1 ; Chen, Zhihui 1 ; Wei, Yi 1 ; Qi, Yanhua 4 ; Wu, Changyin 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Ctr Plant Gene Res Wuhan, Natl Key Lab Crop Genet Improvement, Wuhan, Peoples R China
2.Hubei Univ, Coll Life Sci, Wuhan, Peoples R China
3.Guizhou Acad Agr Sci, Inst Rice Res, Guiyang, Peoples R China
4.Zhejiang Univ, Coll Life Sci, State Key Lab Plant Physiol & Biochem, Hangzhou, Peoples R China
关键词： OsmiR167a; auxin response factors; auxin asymmetric distribution; tiller angle; rice
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）
ISSN： 1467-7644
年卷期： 2020 年 18 卷 10 期
页码：
收录情况： SCI
摘要： Rice tiller angle determines plant growth density and further contributes grain production. Although a few genes have been characterized to regulate tiller angle in rice, the molecular mechanism underlying the control of tiller angle via microRNA is poorly understood. Here, we report that rice tiller angle is controlled by OsmiR167a-targeted auxin response factorsOsARF12,OsARF17and OsARF25. In the overexpression ofOsMIR167aplants, the expression ofOsARF12,OsARF17and OsARF25was severely repressed and displayed larger tiller angle as well as theosarf12/osarf17andosarf12/ osarf25plants. In addition, those plants showed compromised abnormal auxin distribution and less sensitive to gravity. We also demonstrate thatOsARF12,OsARF17and OsARF25function redundantly and might be involved inHSFA2DandLAZY1-dependent asymmetric auxin distribution pathway to control rice tiller angle. Our results reveal that OsmiR167a represses its targets,OsARF12,OsARF17and OsARF25, to control rice tiller angle by fine-tuning auxin asymmetric distribution in shoots.
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