The divergence of brassinosteroid sensitivity between rice subspecies involves natural variation conferring altered internal auto-binding of OsBSK2

作     者：Wenchao Yin Lulu Li Zhikun Yu Fan Zhang Dapu Liu Hongkai Wu Mei Niu Wenjing Meng Xiaoxing Zhang Nana Dong Yanzhao Yang Jihong Liu Yongqiang Liu Guoxia Zhang Jianlong Xu Shimei Wang Chengcai Chu Qian Qian Hongning Tong Wenchao Yin;Lulu Li;Zhikun Yu;Fan Zhang;Dapu Liu;Hongkai Wu;Mei Niu;Wenjing Meng;Xiaoxing Zhang;Nana Dong;Yanzhao Yang;Jihong Liu;Yongqiang Liu;Guoxia Zhang;Jianlong Xu;Shimei Wang;Chengcai Chu;Qian Qian;Hongning Tong

作者机构：National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Rice Research Institute of Anhui Academy of Agricultural SciencesHefei 230001China State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental Biologythe Innovative Academy for Seed DesignChinese Academy of SciencesBeijing 100101China 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2022年第64卷第8期

页      面：1614-1630页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 

基　　金：supported by the Central Public-interest Scientific Institution Basal Research Fund(grant nos.S2022ZD02,Y2020XK16) the National Natural Science Foundation(grant nos.U21A20208,31871587,31900177,31901534) Hainan Yazhou Bay Seed Laboratory(grant no.B21HJ0215) supported by the China Postdoctoral Science Foundation(grant nos.2019M650917,2020T130709) 

主　　题：brassinosteroid divergence grain shape natural variation rice 

摘      要：Japonica/geng and indica/xian are two major rice(Oryza sativa)subspecies with multiple divergent traits,but how these traits are related and interact within each subspecies remains ***(BRs)are a class of steroid phytohormones that modulate many important agronomic traits in ***,using different physiological assays,we revealed that japonica rice exhibits an overall lower BR sensitivity than *** screening of BR signaling genes led to the identification of a set of genes distributed throughout the primary BR signaling pathway with divergent *** these,we demonstrate that the C38/T variant in BR Signaling Kinase2(OsBSK2),causing the amino acid change P13L,plays a central role in mediating differential BR signaling in japonica and indica ***2in indica plays a greater role in BR signaling than OsB SK2in japonica by affecting the auto-binding and protein accumulation of ***,we determined that OsBSK2 is involved in a number of divergent traits in japonica relative to indica rice,including grain shape,tiller number,cold adaptation,and nitrogen-use *** study suggests that the natural variation in OsB SK2 plays a key role in the divergence of BR signaling,which underlies multiple divergent traits between japonica and indica.