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Identification of candidate genes that regulate the trade-off between seedling cold tolerance and fruit quality in melon (Cucumis melo L.)

查看全文 作　　者：Lili [1]Li;Qiong [1]Li;Bin [1]Chen;Jiyu [1]Wang;Fei [1]Ding;Panqiao [1]Wang;Xiuyue [1]Zhang;Juan [1]Hou;Renren [1]Luo;Xiang [1]Li;Jingwen [1]Zheng;Sen [1]Yang;Luming [1]Yang;Lei [1]Zhu;Shouru [1]Sun;Changsheng [1]Ma;Qin [2]Li;Ying [1]Li;Jianbin [1]Hu 高影响力作者 机构地区：[1]College of Horticulture,Henan Agricultural University,Zhengzhou 450002,China;[2]The Seed Management Station of Zhengzhou City,Zhengzhou 450001,China高影响力机构 出　　处：《Horticulture Research》索引2023年第10卷第7期,共15页高影响力期刊 基　　金：Thisworkwas supported by the National Natural Science Foundation of China(Grant numbers 31872101 and 32072564);the Henan Special Funds for Major Science and Technology(221100110400);the Excellent Youth Foundation of Henan Scientific Committee(222300420009);the Foundation for Young Talents of Henan Agricultural University(30500728). 摘　　要：Trade-offs between survival and growth are widely observed in plants.Melon is an annual,trailing herb that produces economically valuable fruits that are traditionally cultivated in early spring in China.Melon seedlings are sensitive to low temperatures,and thus usually suffer from cold stress during the early growth period.However,little is known about the mechanism behind the trade-offs between seedling cold tolerance and fruit quality in melon.In this study,a total of 31 primary metabolites were detected from the mature fruits of eight melon lines that differ with respect to seedling cold tolerance;these included 12 amino acids,10 organic acids,and 9 soluble sugars.Our results showed that concentrations of most of the primary metabolites in the cold-resistant melons were generally lower than in the cold-sensitive melons;the greatest difference in metabolite levels was observed between the cold-resistant line H581 and the moderately cold-resistant line HH09.The metabolite and transcriptome data for these two lines were then subjected to weighted correlation network analysis,resulting in the identification of five key candidate genes underlying the balancing between seedling cold tolerance and fruit quality.Among these genes,CmEAF7 might play multiple roles in regulating chloroplast development,photosynthesis,and the ABA pathway.Furthermore,multi-method functional analysis showed that CmEAF7 can certainly improve both seedling cold tolerance and fruit quality in melon.Our study identified an agriculturally important gene,CmEAF7,and provides a new insight into breeding methods to develop melon cultivars with seedling cold tolerance and high fruit quality. 关 键 词：SEEDLING BREEDING CULTIVAR
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