Joint metabolomic and transcriptomic analysis identify unique phenolic acid and flavonoid compounds associated with resistance to fusarium wilt in cucumber (Cucumis sativus L.)
文献类型： 外文期刊
作者： Yang, Kankan 1 ; Zhou, Geng 3 ; Chen, Chen 3 ; Liu, Xiaohong 3 ; Wei, Lin 2 ; Zhu, Feiying 2 ; Liang, Zhihuai 2 ; Chen, Huiming 1 ;
作者机构： 1.Hunan Univ, Grad Sch, Longping Branch, Changsha, Peoples R China
2.Hunan Acad Agr Sci, Changsha, Peoples R China
3.Hunan Acad Agr Sci, Hunan Vegetable Res Inst, Changsha, Peoples R China
关键词： cucumber; Fusarium wilt; metabolomic; RNA-seq; phenolic acid; flavonoids
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.3 ）
ISSN： 1664-462X
年卷期： 2024 年 15 卷
页码：
收录情况： SCI
摘要： Introduction: Fusarium wilt (FW) caused by Fusarium oxysporum f. sp. cucumerinum (Foc) is a destructive soil-borne disease in cucumber (Cucumis sativus. L). However, there remains limited knowledge on the molecular mechanisms underlying FW resistance-mediated defense responses in cucumber. Methods: In this study, metabolome and transcriptome profiling were carried out for two FW resistant (NR) and susceptible (NS), near isogenic lines (NILs) before and after Foc inoculation. NILs have shown consistent and stable resistance in multiple resistance tests conducted in the greenhouse and in the laboratory. A widely targeted metabolomic analysis identified differentially accumulated metabolites (DAMs) with significantly greater NR accumulation in response to Foc infection, including many phenolic acid and flavonoid compounds from the flavonoid biosynthesis pathway. Results: Transcriptome analysis identified differentially expressed genes (DEGs) between the NILs upon Foc inoculation including genes for secondary metabolite biosynthesis and transcription factor genes regulating the flavonoid biosynthesis pathway. Joint analysis of the metabolomic and transcriptomic data identified DAMs and DEGs closely associated with the biosynthesis of phenolic acid and flavonoid DAMs. The association of these compounds with NR-conferred FW resistance was exemplified by in vivo assays. These assays found two phenolic acid compounds, bis (2-ethylhexyl) phthalate and diisooctyl phthalate, as well as the flavonoid compound gallocatechin 3-O-gallate to have significant inhibitory effects on Foc growth. The antifungal effects of these three compounds represent a novel finding. Discussion: Therefore, phenolic acids and flavonoids play important roles in NR mediated FW resistance breeding in cucumber.
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