The LRXs-RALFs-FER module controls plant growth and salt stress responses by modulating multiple plant hormones

查看全文 作　　者：Chunzhao [1,2,3]Zhao;Wei [2,4]Jiang;Omar [2,5]Zayed;Xin [1,6]Liu;Kai [1,2]Tang;Wenfeng [1]Nie;Yali [1]Li;Shaojun [2]Xie;Yuan [2,7]Li;Tiandan [2,8]Long;Linlin [1,6]Liu;Yingfang [3]Zhu;Yang [1,3]Zhao;Jian-Kang [1,2]Zhu

机构地区：[1]Shanghai Center for Plant Stress Biology and Center of Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 200032,China;[2]Department of Horticulture and Landscape Architecture,Purdue University,West Lafayette,IN 47907,USA;[3]Key laboratory of Plant Stress Biology,School of Life Sciences,Henan University,Kaifeng 475004,China;[4]National Center for Soybean Improvement,Key Laboratory of Biology and Genetics and Breeding for Soybean,Ministry of Agriculture,State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,China;[5]Genetics Department,Faculty of Agriculture,Menofia University,Shebeen Elkoum 32511,Egypt;[6]University of the Chinese Academy of Sciences,Beijing 100049,China;[7]State Key Laboratory of Plant Physiology and Biochemistry,College of Biological Sciences,China Agricultural University,Beijing 100193,China;[8]State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China,Sichuan Agricultural University,Chengdu 611130,China

出　　处：《National Science Review》索引2021年第8卷第1期,共16页

基　　金：supported by the Strategic Priority Research Program(XDB27040101)of the Chinese Academy of Sciences。 摘　　要：Salt stress is a major environmental factor limiting plant growth and productivity.We recently discovered an important new salt tolerance pathway,where the cell wall leucine-rich repeat extensins LRX3/4/5,the RAPID ALKALINIZATION FACTOR(RALF)peptides RALF22/23 and receptor-like kinase FERONIA(FER)function as a module to simultaneously regulate plant growth and salt stress tolerance.However,the intracellular signaling pathways that are regulated by the extracellular LRX3/4/5-RALF22/23-FER module to coordinate growth,cell wall integrity and salt stress responses are still unknown.Here,we report that the LRX3/4/5-RALF22/23-FER module negatively regulates the levels of jasmonic acid(JA),salicylic acid(SA)and abscisic acid(ABA).Blocking JA pathway rescues the dwarf phenotype of the lrx345 and fer-4mutants,while disruption of ABA biosynthesis suppresses the salt-hypersensitivity of these mutants.Many salt stress-responsive genes display abnormal expression patterns in the lrx345 and fer-4 mutants,as well as in the wild type plants treated with epigallocatechin gallate(EGCG),an inhibitor of pectin methylesterases,suggesting cell wall integrity as a critical factor that determines the expression pattern of stress-responsive genes.Production of reactive oxygen species(ROS)is constitutively increased in the lrx345 and fer-4mutants,and inhibition of ROS accumulation suppresses the salt-hypersensitivity of these mutants.Together,our work provides strong evidence that the LRX3/4/5-RALF22/23-FER module controls plant growth and salt stress responses by regulating hormonal homeostasis and ROS accumulation. 关键词：salt stress cell wall integrity growth LRX RALF FER HORMONE

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The LRXs-RALFs-FER module controls plant growth and salt stress responses by modulating multiple plant hormones

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