您好，欢迎访问山东省农业科学院文献资源数据库平台

The cytokinin receptor OHK4/OsHK4 regulates inflorescence architecture in rice via an IDEAL PLANT ARCHITECTURE1/WEALTHY FARMER'S PANICLE-mediated positive feedback circuit

文献类型： 外文期刊

作者： Chun, Yan 1 ; Fang, Jingjing 1 ; Savelieva, Ekaterina M. 2 ; Lomin, Sergey N. 2 ; Shang, Jiangyuan 1 ; Sun, Yinglu 1 ; Zhao, Jinfeng 1 ; Kumar, Ashmit 1 ; Yuan, Shoujiang 3 ; Yao, Xuefeng 4 ; Liu, Chun-Ming 1 ; Arkhipov, Dmitry, V 2 ; Romanov, Georgy A. 2 ; Li, Xueyong 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China

2.Russian Acad Sci, Timiryazev Inst Plant Physiol, Moscow 127276, Russia

3.Shandong Acad Agr Sci, Inst Wetland Agr & Ecol, Jinan 250100, Peoples R China

4.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China

期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.9 ）

ISSN： 1040-4651

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Inflorescence architecture is important for rice (Oryza sativa) grain yield. The phytohormone cytokinin (CK) has been shown to regulate rice inflorescence development; however, the underlying mechanism mediated by CK perception is still unclear. Employing a forward genetic approach, we isolated an inactive variant of the CK receptor OHK4/OsHK4 gene named panicle length1, which shows decreased panicle size due to reduced inflorescence meristem (IM) activity. A 2-amino acid deletion in the long alpha-helix stalk of the sensory module of OHK4 impairs the homodimerization and ligand-binding capacity of the receptor, even though the residues do not touch the ligand-binding domain or the dimerization interface. This deletion impairs CK signaling that occurs through the type-B response regulator OsRR21, which acts downstream of OHK4 in controlling inflorescence size. Meanwhile, we found that IDEAL PLANT ARCHITECTURE1(IPA1)/WEALTHY FARMER'S PANICLE (WFP), encoding a positive regulator of IM development, acts downstream of CK signaling and is directly activated by OsRR21. Additionally, we revealed that IPA1/WFP directly binds to the OHK4 promoter and upregulates its expression through interactions with 2 TCP transcription factors, forming a positive feedback circuit. Altogether, we identified the OHK4-OsRR21-IPA1 regulatory module, providing important insights into the role of CK signaling in regulating rice inflorescence architecture. A positive feedback circuit involving the cytokinin signaling cascade OHK4-HPts-OsRR21 and IDEAL PLANT ARCHITECTURE1/WEALTHY FARMER'S PANICLE regulates inflorescence architecture in rice.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山东省农业科学院文献资源数据库平台

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台