The OsBZR1-OsSPX1/2 module fine-tunes the growth-immunity trade-off in adaptation to phosphate availability in rice  

作　　者：Yuqing He Yao Zhao Jitao Hu Lanlan Wang Linying Li Xueying Zhang Zhongjing Zhou Lili Chen Hua Wangl Jiaoyu Wang Gaojie Hong 

机构地区：[1]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province,Institute of Virology and Biotechnology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China [2]Key Laboratory of Traceability for Agricultural Genetically Modified Organisms,Ministry of Agriculture and Rural Affairs,Hangzhou 310021,P.R.China [3]College of Life Sciences,Zhejiang Sci-Tech University,Hangzhou 310018,P.R.China [4]State Key Laboratory for Managing Biotic and Chemical Threats to the Qualty and Safety of Agro-products,Zhejang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China [5]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Key Labory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province,Institute of Plant Protection and Microbiology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China

出　　处：《Molecular Plant》2024年第2期258-276,共19页分子植物（英文版）

基　　金：This work was funded by the Zhejiang Provincial Natural Science Foundation of China(LR22C020003);the National Natural Science Foundation of China(32272553,31800249,31670291,and 32000234);the Major Science and Technology Special Project of Variety Breeding of Zhejiang Province(2021C02067-7);the State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products.

摘　　要：The growth-promoting hormones brassinosteroids(BRs)and their key signaling component BZR1 play a vital role in balancing normal growth and defense reactions.Here,we discovered that BRs and OsBZR1 up-regulated sakuranetin accumulation and conferred basal defense against Magnaporthe oryzae infection under normal conditions.Resource shortages,including phosphate(Pi)deficiency,potentially disrupt this growth-defense balance.OsSPX1 and OsSPX2 have been reported to sense Pi concentration and interact with the Pi signal mediator OsPHR2,thus regulating Pi starvation responses.In this study,we discovered that OsSPX1/2 interacts with OsBZR1 in both Pi-sufficient and Pi-deficient conditions,inhibit-ing BR-responsive genes.When Pi is sufficient,OsSPX1/2 is captured by OsPHR2,enabling most of OsBzR1 to promote plant growth and maintain basal resistance.In response to Pi starvation,more OsSPX1/2 is released from OsPHR2 to inhibit OsBZR1 activity,resulting in slower growth.Collectively,our study reveals that the OsBZR1-SPX1/2 module balances the plant growth-immunity trade-off in responsetoPiavailability.He Y.,Zhao Y.,Hu J.,Wang L.,Li L.,Zhang X.,Zhou Z.,Chen L.,Wang H.,Wang J.,and Hong G.(2024).The OsBZR1-OsSPX1/2 module fine-tunes the growth-immunity trade-off in adaptation to phosphate availability in esponse to Pi availability.

关 键 词：immunity MAINTAIN ADAPTATION 

分 类 号：S511[农业科学—作物学]