Anα/βhydrolase family member negatively regulates salt tolerance but promotes flowering through three distinct functions in rice  

作　　者：You-Huang Xiang Jia-Jun Yu Ben Liao Jun-Xiang Shan Wang-Wei Ye Nai-Qian Dong Tao Guo Yi Kan Hai Zhang Yi-Bing Yang Ya-Chao Li Huai-Yu Zhao Hong-Xiao Yu Zi-Qi Lu Hong-Xuan Lin 

机构地区：[1]National Key Laboratory of Plant Molecular Genetics,CAS Centre for Excellence in Molecular Plant Sciences and Collaborative Innovation Center of Genetics&Development,Shanghai Institute of Plant Physiology and Ecology,Chinese Academy of Sciences,Shanghai 200032,China [2]Guangdong Laboratory for Lingnan Modern Agriculture,Guangzhou 510642,China [3]University of the Chinese Academy of Sciences,Beijing 100049,China [4]School of Life Science and Technology,ShanghaiTech University,Shanghai 201210,China

出　　处：《Molecular Plant》2022年第12期1908-1930,共23页分子植物（英文版）

基　　金：This work was supported by thegrants from Laboratory of Lingnan Modern Agriculture Project(NT2021002);National Natural Science Foundation of China(31788103);Chinese Academyof Sciences(XDB27010104,QYZDY-SSW-SMC023,159231KYSB20200008);CAS-Croucher Funding Scheme for Joint Laboratories,and National Key Laboratory of Plant MolecularGenetics。

摘　　要：Ongoing soil salinization drastically threatens crop growth,development,and yield worldwide.It is therefore crucial that we improve salt tolerance in rice by exploiting natural genetic variation.However,many salt-responsive genes confer undesirable phenotypes and therefore cannot be effectively applied to practical agricultural production.In this study,we identified a quantitative trait locus for salt tolerance from the African rice species Oryza glaberrima and named it as Salt Tolerance and Heading Date 1(STH1).We found that STH1 regulates fatty acid metabolic homeostasis,probably by catalyzing the hydrolytic degradation of fatty acids,which contributes to salt tolerance.Meanwhile,we demonstrated that STH1 forms a protein complex with D3 and a vital regulatory factor in salt tolerance,OsHAL3,to regulate the protein abundance of OsHAL3 via the 26S proteasome pathway.Furthermore,we revealed that STH1 also serves as a co-activator with the floral integrator gene Heading date 1 to balance the expression of the florigen gene Heading date 3a under different circumstances,thus coordinating the regulation of salt tolerance and heading date.Notably,the allele of STH1 associated with enhanced salt tolerance and high yield is found in some African rice accessions but barely in Asian cultivars.Introgression of the STH1HP46 allele from African rice into modern rice cultivars is a desirable approach for boosting grain yield under salt stress.Collectively,our discoveries not only provide conceptual advances on the mechanisms of salt tolerance and synergetic regulation between salt tolerance and flowering time but also offer potential strategies to overcome the challenges resulted from increasingly serious soil salinization that many crops are facing.

关 键 词：RICE salt tolerance flowering time grain yield fatty acid 

分 类 号：S511[农业科学—作物学]