The Ghd7 transcription factor represses ARE1 expression to enhance nitrogen utilization and grain yield in rice

查看全文 作　　者：Qing [1,2,3,8]Wang;Qingmei [3,4,8]Su;Jinqiang [1,3,8]Nian;Jian [1]Zhang;Meng [1,8]Guo;Guojun [5]Dong;Jiang [5]Hu;Rongsheng [1,3]Wang;Changshuo [1,3,8]Wei;Guanwen [6]Li;Wan [1,8]Wang;Hui-Shan [2,3]Guo;Shaoyang [1,3,8]Lin;Wenfeng [1,3,8]Qian;[7]XianzhiXie;Qian [5]Qian;Fan [3,4,8,10]Chen;Jianru [1,3,8,9,10]Zuo

机构地区：[1]State Key Laboratory of Plant Genomics,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China;[2]State Key Laboratory of Plant Genomics,Institute of Microbiology,Chinese Academy of Sciences,Beijing 100101,China;[3]University of Chinese Academy of Sciences,Beijing 100049,China;[4]State Key Laboratory of Molecular Developmental Biology,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China;[5]State Key Laboratory of Rice Biology,China National Rice Research Institute,Hangzhou 310006,China;[6]Chinese Research Academy of Environmental Sciences,Beijing 100012,China;[7]Shandong Rice Research Institute,Shandong Academy of Agricultural Sciences,Jinan 250100,China;[8]Innovation Academy for Seed Design,Chinese Academy of Sciences,Beijing 100101,China;[9]CAS Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Beijing 100101,China;[10]Hainan Yazhou Bay Seed Laboratory,Sanya 572025,China

出　　处：《Molecular Plant》索引2021年第14卷第6期,共12页

基　　金：supported by grants from the Ministry of Science and Technology of the People's Republic of China(2016YFD0100706);the Ministry of Agriculture and Rural Affairs of China(2016ZX08009003-004);the State Key Laboratory of Plant Genomics(SKLPG2016A-22). 摘　　要：The genetic improvement of nitrogen use efficiency(NUE)of crops is vital for grain productivity and sustainable agriculture.However,the regulatory mechanism of NUE remains largely elusive.Here,we report that the rice Grain number,plant height,and heading date7(Ghd7)gene genetically acts upstream of ABC1 REPRESSOR1(ARE1),a negative regulator of NUE,to positively regulate nitrogen utilization.As a transcriptional repressor,Ghd7 directly binds to two Evening Element-like motifs in the promoter and intron 1 of ARE1,likely in a cooperative manner,to repress its expression.Ghd7 and ARE1 display diurnal expression patterns in an inverse oscillation manner,mirroring a regulatory scheme based on these two loci.Analysis of a panel of 2656 rice varieties suggests that the elite alleles of Ghd7 and ARE1 have undergone diversifying selection during breeding.Moreover,the allelic distribution of Ghd7 and ARE1 is associated with the soil nitrogen deposition rate in East Asia and South Asia.Remarkably,the combination of the Ghd7 and ARE1 elite alleles substantially improves NUE and yield performance under nitrogen-limiting conditions.Collectively,these results define a Ghd7–ARE1-based regulatory mechanism of nitrogen utilization,providing useful targets for genetic improvement of rice NUE. 关键词：ELITE CROPS HEADING

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The Ghd7 transcription factor represses ARE1 expression to enhance nitrogen utilization and grain yield in rice

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