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Combined transcriptome and metabolome analysis reveals the mechanism of fruit quality formation in different watermelon (Citrullus lanatus) cultivars

文献类型： 外文期刊

作者： Peng, Zhenzhen 1 ; Song, Shuhui 1 ; Fu, Daqi 6 ; Zhou, Jiahua 1 ; Chang, Hong 1 ; Wang, Baogang 1 ; Xu, Ranran 1 ; Zhang, Chao 1 ; Wang, Yunxiang 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Agrifood Proc & Nutr, Beijing 100097, Peoples R China

2.Beijing Key Lab Fruits & Vegetable Storage & Proc, Beijing 100097, Peoples R China

3.Minist Agr & Rural Areas, Key Lab Vegetable Postharvest Proc, Beijing 100097, Peoples R China

4.Chongqing Inst Food & Drug Control, Chongqing 401121, Peoples R China

5.State Adm Market Regulat, Key Lab Condiment Supervis Technol, Chongqing 401121, Peoples R China

6.China Agr Univ, Coll Food Sci & Nutr Engn, Lab Fruit Biol, Beijing 100083, Peoples R China

关键词： Watermelon; Transcriptome; Metabolome; Fruit quality; Flesh color

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 339 卷

页码：

收录情况： SCI

摘要： Fruit characteristics (flesh color, sweetness, flavor, etc.) of watermelon are largely the result of human selection. In this study, we combined the metabolome and transcriptome to investigate differentially expressed genes and differential metabolites related to sugar-acid and flesh color in four commercial watermelon cultivars. Fifty-eight genes and nine metabolites were identified in the organic acid and sugar metabolism pathways. Six of these metabolites were significantly up-regulated in 'Jingcai No.1' (JC), including sucrose, fructose, cellobiose, oxaloacetate, succinate, and malate. The expression of sucrose synthase 2 (SUS2), sucrose-phosphate synthase (SPS1), fructose bisphosphate aldolase (FBA2), glyceraldehyde 3-phosphate dehydrogenase(GAPN), trehalosephosphate phosphatase (TPPJ), trehalose-phosphate synthase (TPS1), 1,4-alpha-glucan-branching ( SBE1 ) and SBE3, which are involved in sugar and acid metabolism, was also significantly higher than that of the other three cultivars. A total of 55 genes and 102 metabolites were identified in the pathway related to flesh color formation (carotenoid synthesis, phenylpropanoid synthesis, flavonoid synthesis). The abundance of genes and metabolites associated with sugar and acid metabolism and color formation were generally lower in 'Jingmei 2k' (EK) and 'L600' (LB) than in JC and 'Chaoyue' (CY). In summary, the omics analysis of the four watermelon cultivars revealed significant differences in metabolic genes and metabolites involved in sugar-acid biosynthesis and flesh color formation, which provides new ideas for improving the quality and commercial value of watermelon fruits through genetic engineering.

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