DNA methylation mediated by RdDM pathway and demethylation affects furanone accumulation through regulation of QUINONE OXIDOREDUCTASE in strawberry  

作　　者：Yunduan Li Yanna Shi Yichen Li Jiao Lu Yunfan Sun Yuanyuan Zhang Wenbo Chen Xiaofang Yang Donald Grierson Zhaobo Lang Guihua Jiang Kunsong Chen 

机构地区：[1]College of Agriculture&Biotechnology,Zhejiang University,Zijingang Campus,Hangzhou 310058,China [2]Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology,Zhejiang University,Zijingang Campus,Hangzhou 310058,China [3]The State Agriculture Ministry Laboratory of Horticultural Plant Growth,Development and Quality Improvement,Zhejiang University,Zijingang Campus,Hangzhou 310058,China [4]Institute of Horticulture,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,Zhejiang,China [5]Division of Plant and Crop Sciences,School of Biosciences,University of Nottingham,Sutton Bonington Campus,Loughborough LE125RD,United Kingdom [6]Institute of Advanced Biotechnology and School of Life Sciences,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Horticulture Research》2023年第8期170-182,共13页园艺研究（英文）

摘　　要：Recently,increasing evidence suggests that DNA methylation plays a crucial role in fruit ripening.However,the role of DNA methylation in regulating specific traits,such as flavor,remains unclear.Here,we report a role of DNA methylation in affecting furanone biosynthesis in strawberry.Strawberry quinone oxidoreductase(FaQR)is a key enzyme in furanone biosynthesis.There are four FaQR homologs in strawberry cultivar‘Yuexin’,and one of them,FaQR3,contributes∼50%of FaQR transcripts,indicating a major role of FaQR3 in furanone biosynthesis.Through characterization of levels of DNA methylation and FaQR3 transcript and furanone contents during fruit ripening and after the application of DNA methylation inhibitor,we found that the DNA methylation level of the FaQR3 promoter was negatively correlated with FaQR3 expression and furanone accumulation,suggesting that DNA methylation may be involved in furanone biosynthesis through adjusting FaQR3 expression,and responded to different temperatures consistently.In addition,transient expression of a gene in the RNA-directed DNA methylation(RdDM)pathway,FaAGO4,and enrichment analysis of the 24-nucleotide siRNAs suggested that DNA methylation in the FaQR3 promoter is mediated by the RdDM pathway.Transient RNA interference(RNAi)of FaDML indicated that the demethylation pathway may be involved in regulating furanone accumulation.These findings provide new insights into the role of DNA methylation and demethylation in affecting flavor quality in strawberry during fruit ripening.

关 键 词：STRAW FURAN transient 

分 类 号：S668.4[农业科学—果树学]