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Natural variation in SlSOS2 promoter hinders salt resistance during tomato domestication

查看全文 作　　者：Yechun [2,5]Hong;Xijin [3]Guan;Xu [1]Wang;Dali [2]Kong;Shuojun [1]Yu;Zhiqiang [1]Wang;Yongdong [2]Yu;Zhen-Fei [2]Chao;Xue [2]Liu;Sanwen [4]Huang;Jian-Kang [2,5]Zhu;Guangtao [3]Zhu;Zhen [1,2]Wang 高影响力作者 机构地区：[1]School of Life Sciences,Anhui Agricultural University,Hefei,Anhui,230036,China;[2]Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 200032,China;[3]The AGISCAAS-YNNU Joint Academy of Potato Sciences,Yunnan Normal University,Kunming,650500,China;[4]Genome Analysis Laboratory of the Ministry of Agriculture,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen,518000,China;[5]Institute of Advanced Biotechnology and School of Life Sciences,Southern University of Science and Technology,Shenzhen 518055,China高影响力机构 出　　处：《Horticulture Research》索引2023年第10卷第1期,共8页高影响力期刊 基　　金：This work was supported by the National Natural Science Foun-dation of China(grant 32000206 to Z.W.);the Natural Science Foundation of Anhui Province(grant 2208085Y08 to Z.W.). 摘　　要：Increasing soil salinization seriously impairs plant growth and development,resulting in crop loss.The Salt-Overly-Sensitive(SOS)pathway is indispensable to the mitigation of Na+toxicity in plants under high salinity.However,whether natural variations of SOS2 contribute to salt tolerance has not been reported.Here a natural variation in the SlSOS2 promoter region was identified to be associated with root Na+/K+ratio and the loss of salt resistance during tomato domestication.This natural variation contains an ABI4-binding cis-element and plays an important role in the repression of SlSOS2 expression.Genetic evidence revealed that SlSOS2 mutations increase root Na+/K+ratio under salt stress conditions and thus attenuate salt resistance in tomato.Together,our findings uncovered a critical but previously unknown natural variation of SOS2 in salt resistance,which provides valuable natural resources for genetic breeding for salt resistance in cultivated tomatoes and other crops. 关 键 词：BREEDING SOS SOIL
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