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Metabolomic and transcriptomic analyses reveal the mechanism of sweet-acidic taste formation during pineapple fruit development

文献类型： 外文期刊

作者： Gao, Yuyao 1 ; Yao, Yanli 2 ; Chen, Xin 3 ; Wu, Jianyang 4 ; Wu, Qingsong 2 ; Liu, Shenghui 2 ; Guo, Anping 5 ; Zhang, Xiumei 2 ;

作者机构： 1.Hainan Univ, Coll Trop Crops, Haikou, Peoples R China

2.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Key Lab, Minist Agr Trop Fruit Biol, Zhanjiang, Peoples R China

3.Taixing Inst Agr Sci, Taixing, Peoples R China

4.Zhanjiang Presch Educ Coll, Dept Sci Educ, Zhanjiang, Peoples R China

5.Chinese Acad Trop Agr Sci, Sanya Res Inst, Sanya, Peoples R China

关键词： Ananas comosus; fruit quality; sucrose; citric acid; metabolic genes; transporter genes

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Pineapple (Ananas comosus L.) is one of the most valuable subtropical fruit crop in the world. The sweet-acidic taste of the pineapple fruits is a major contributor to the characteristic of fruit quality, but its formation mechanism remains elusive. Here, targeted metabolomic and transcriptomic analyses were performed during the fruit developmental stages in two pineapple cultivars ("Comte de Paris" and "MD-2") to gain a global view of the metabolism and transport pathways involved in sugar and organic acid accumulation. Assessment of the levels of different sugar and acid components during fruit development revealed that the predominant sugar and organic acid in mature fruits of both cultivars was sucrose and citric acid, respectively. Weighted gene coexpression network analysis of metabolic phenotypes and gene expression profiling enabled the identification of 21 genes associated with sucrose accumulation and 19 genes associated with citric acid accumulation. The coordinated interaction of the 21 genes correlated with sucrose irreversible hydrolysis, resynthesis, and transport could be responsible for sucrose accumulation in pineapple fruit. In addition, citric acid accumulation might be controlled by the coordinated interaction of the pyruvate-to-acetyl-CoA-to-citrate pathway, gamma-aminobutyric acid pathway, and tonoplast proton pumps in pineapple. These results provide deep insights into the metabolic regulation of sweetness and acidity in pineapple.

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