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Comparative Analysis of Transcriptomics and Metabolomics Reveals Defense Mechanisms in Melon Cultivars against Pseudoperonospora cubensis Infection

文献类型： 外文期刊

作者： Ling, Yueming 1 ; Xiong, Xianpeng 2 ; Yang, Wenli 1 ; Liu, Bin 1 ; Shen, Yue 1 ; Xu, Lirong 1 ; Lu, Fuyuan 4 ; Li, Meihua 1 ; Guo, Yangdong 5 ; Zhang, Xuejun 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Hami Melon Res Ctr, Urumqi 830091, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Minist Agr & Rura, Shenzhen 518120, Peoples R China

3.Xinjiang Agr Univ, Coll Hort, Urumqi 830091, Peoples R China

4.Shihezi Univ, Coll Agr, Shihezi 832003, Peoples R China

5.China Agr Univ, Coll Hort, Beijing 100193, Peoples R China

6.Xinjiang Acad Agr Sci, Hainan Sanya Expt Ctr Crop Breeding, Sanya 572019, Peoples R China

关键词： melon; downy mildew; transcriptomic; metabolomic; flavonoid; lignin

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2023 年 24 卷 24 期

页码：

收录情况： SCI

摘要： Melon (Cucumis melo L.) represents an agriculturally significant horticultural crop that is widely grown for its flavorful fruits. Downy mildew (DM), a pervasive foliar disease, poses a significant threat to global melon production. Although several quantitative trait loci related to DM resistance have been identified, the comprehensive genetic underpinnings of this resistance remain largely uncharted. In this study, we utilized integrative transcriptomics and metabolomics approaches to identify potential resistance-associated genes and delineate the strategies involved in the defense against DM in two melon cultivars: the resistant 'PI442177' ('K10-1') and the susceptible 'Huangdanzi' ('K10-9'), post -P. cubensis infection. Even in the absence of the pathogen, there were distinctive differentially expressed genes (DEGs) between 'K10-1' and 'K10-9'. When P. cubensis was infected, certain genes, including flavin-containing monooxygenase (FMO), receptor-like protein kinase FERONIA (FER), and the HD-ZIP transcription factor member, AtHB7, displayed pronounced expression differences between the cultivars. Notably, our data suggest that following P. cubensis infection, both cultivars suppressed flavonoid biosynthesis via the down-regulation of associated genes whilst concurrently promoting lignin production. The complex interplay of transcriptomic and metabolic responses elucidated by this study provides foundational insights into melon's defense mechanisms against DM. The robust resilience of 'K10-1' to DM is attributed to the synergistic interaction of its inherent transcriptomic and metabolic reactions.

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