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Integrating transcriptome and metabolome to explore the formation of fruit aroma in different types of pepper

文献类型： 外文期刊

作者： Gong, Chengsheng 1 ; Guo, Guangjun 1 ; Pan, Baogui 1 ; Gao, Changzhou 1 ; Liu, Jinbing 1 ; Wang, Shubin 1 ; Diao, Weiping 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Peoples R China

关键词： Pepper; Volatile organic compounds; Transcriptome; Metabolome; Co-expression network

期刊名称：FOOD BIOSCIENCE （ 影响因子：5.9； 五年影响因子：6.1 ）

ISSN： 2212-4292

年卷期： 2024 年 62 卷

页码：

收录情况： SCI

摘要： The fruity aroma of capsicum is a crucial aspect of its flavor profile, and it is imperative to thoroughly investigate the metabolic and genetic foundations underlying its formation. In this study, 7 samples from 5 pepper varieties were used as test materials, and the detection of volatile organic compounds was carried out by SPME-GC-MS/MS. The transcriptome sequencing work was completed using the Illumina platform, and further completed the difference analysis and correlation analysis. 766 volatile organic compounds were detected, 136.6 Gb of clean data were obtained, and a significant difference was found in metabolites and gene expression among different samples. Through further difference analysis, it was found that the contents of 50 metabolites in DC351 (55 DAP) and DC612 with aromatic fruits were significantly higher than those of other varieties; additionally, the rOAV value of 8 metabolites exceeded 1. And ester and terpene metabolites were the key metabolites of pepper fruit aroma. 20 modules have achieved gene enrichment analysis. Further analysis revealed key genes involved in the lipoxygenase and MEP pathways. For example, genes such as alcohol dehydrogenase (Capana06g000848) were closely related to the content of lipid metabolites such as acetic acid nonyl ester, while genes such as 1-deoxy-D-xylulose-5-phosphate reductase (Capana03g000964) were closely related to the content of terpenoid metabolites such as 1- (2,6,6-trimethyl-1,3-cyclohexan-1-yl) - and (E) -. In conclusion, our research is expected to uncover key metabolites and genes related to the aroma of pepper fruits, which is of great significance for trait improvement and genetic research.

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