The GW2-WG1-OsbZIP47 pathway controls grain size and weight in rice

查看全文 作　　者：Jianqin [1]Hao;Dekai [2]Wang;Yingbao [1]Wu;Ke [1,6]Huang;Penggen [1]Duan;Na [1]Li;Ran [1]Xu;Dali [3]Zeng;Guojun [3]Dong;Baolan [1]Zhang;Limin [1]Zhang;Dirk [4,5]Inze;Qian [3]Qian;Yunhai [1,6]Li

机构地区：[1]State Key Laboratory of Plant Cell and Chromosome Engineering,CAS Centre for Excellence in Molecular Plant Biology,Institute of Genetics and Developmental Biology,The Innovative Academy of Seed Design,Chinese Academy of Sciences,Beijing 100101,China;[2]College of Life Sciences and Medicine,Zhejiang Sci-Tech University,Hangzhou 310018,China;[3]State Key Laboratory of Rice Biology,China National Rice Research Institute,Hangzhou 310006,China;[4]Ghent University,Department of Plant Biotechnology and Bioinformatics,9052 Ghent,Belgium;[5]VIB Center for Plant Systems Biology,9052 Ghent,Belgium;[6]University of Chinese Academy of Sciences,Beijing 100039,China

出　　处：《Molecular Plant》索引2021年第14卷第8期,共15页

基　　金：supported by grants from the National Natural Science Foundation of China(3181101602 to Y.L,91735302 to Y.L.,3187080209 to N.L.,91735304 to Q.Q.,31571742 to D.W.);the strategic priority research program of the Chinese Academy of Sciences(XDB27010102);the National Basic Researoh Program of China(2018YFD1000706-10 to R.X.,2016YFD0100501 to N.L.,2016YFD0100402 to P.D.,2016YFD0100401 to D.W.,2017YFD0101701 to R.X.);the National Ten-Thousand Talents Program of China to Y.LI.;the Youth innovation promotion association CAS to P.D.(2019102);the National Special Project(2016ZX08009003-003). 摘　　要：Regulation of seed size is a key strategy for improving crop yield and is also a basic biological question.However,the molecular mechanisms by which plants determine their seed size remain elusive.Here,we report that the GW2-WG1-OsbZIP47 regulatory module controls grain width and weight in rice.WG1,which encodes a glutaredoxin protein,promotes grain growth by increasing cell proliferation.Interestingly,WG1 interacts with the transcription factor OsbZIP47 and represses its transcriptional activity by associating with the transcriptional co-repressor ASP1,indicating that WG1 may act as an adaptor protein to recruit the transcriptional co-repressor.In contrary,OsbZIP47 restricts grain growth by decreasing cell proliferation.Further studies reveal that the E3 ubiquitin ligase GW2 ubiquitinates WG1 and targets it for degradation.Genetic analyses confirm that GW2,WG1,and OsbZIP47 function in a comm on pathway to control grain growth.Taken together,ourfindi ngs reveal a genetic and molecular framework for the control of grain size and weight by the GW2-WG1-OsbZIP47 regulatory module,providing new targets for improving seed size and weight in crops. 关键词：RICE WG1 GW2 OsbZIP47 grain size and weight cell proliferation

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The GW2-WG1-OsbZIP47 pathway controls grain size and weight in rice

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