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Multi-Omics Analysis Uncovers the Mechanism for Enhanced Organic Acid Accumulation in Peach (Prunus persica L.) Fruit from High-Altitude Areas

文献类型： 外文期刊

作者： Song, Haiyan 1 ; Zhao, Ke 1 ; Wang, Xiaoan 1 ; Jiang, Guoliang 1 ; Li, Jing 1 ; He, Chengyong 1 ; Wang, Lingli 1 ; Sun, Shuxia 1 ; Tu, Meiyan 1 ; Wang, Qiang 4 ; Gong, Ronggao 3 ; Chen, Dong 1 ;

作者机构： 1.Sichuan Acad Agr Sci, Inst Hort, Chengdu 610066, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Hort Crop Biol & Germplasm Creat Southwest, Chengdu 610066, Peoples R China

3.Sichuan Agr Univ, Coll Hort, Chengdu, Peoples R China

4.Chengdu Agr Technol Extens Stn, Chengdu, Peoples R China

关键词： peach; high altitude; organic acid; WGCNA

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 22 期

页码：

收录情况： SCI

摘要： The early-ripening peach industry has undergone rapid development in the Panxi region of the Sichuan Basin in recent years. However, after the introduction of some new peach varieties to the high-altitude peach-producing areas in Panxi, the titratable acid content in peach fruit has significantly increased. This study compared the fruit quality indicators of early-ripening peach varieties cultivated in Xide County (a high-altitude peach-producing area) and Longquanyi District (a low-altitude peach-producing area) in Sichuan Province and analyzed the differences in organic acid metabolism by combining primary metabolomic and transcriptomic approaches. The results showed that the 'Zhongtaohongyu' fruit from the high-altitude peach-producing area had a much higher accumulation of malic acid and, accordingly, a significantly higher organic acid content than the other samples. The lower annual average temperature and stronger ultraviolet radiation in high-altitude peach-producing areas may lead to the increased expression of genes (PpNAD-ME1, PpNADP-ME3, and PpPEPC1) in the organic acid synthesis pathway and the decreased expression of genes (PpACO2, PpNAD-MDH2/3/4/5, and PpPEPCK2) in the organic acid degradation pathway in peach fruit, ultimately resulting in the accumulation of more organic acids. Among them, the downregulation of the key genes PpNAD-MDH3/4/5 involved in malic acid metabolism may be the main reason for the higher malic acid accumulation in peach fruit from high-altitude peach-producing areas. Overall, this study elucidates the mechanism by which environmental factors enhance the accumulation of organic acids in peach fruit from high-altitude peach-producing areas from a multi-omics perspective, as well as providing a theoretical basis for screening key genes involved in organic acid metabolism in peach fruit.

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