A candidate PpRPH gene of the D locus controlling fruit acidity in peach

文献类型： 外文期刊

第一作者： Wang, Lu

作者： Wang, Lu;Jiang, Xiaohan;Zhao, Li;Liu, Yudi;Zhou, Hui;Han, Yuepeng;Wang, Lu;Jiang, Xiaohan;Han, Yuepeng;Jiang, Xiaohan;Liu, Yudi;Wang, Furong;He, Huaping;Han, Yuepeng

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关键词： Prunus persica; Fruit acidity; Linkage mapping; Organic acids; Small protein

期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：4.076； 五年影响因子：4.89 ）

ISSN： 0167-4412

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收录情况： SCI

摘要： Key message A candidate gene, designate PpRPH, in the D locus was identified to control fruit acidity in peach. Fruit acidity has a strong impact on organoleptic quality of fruit. Peach fruit acidity is controlled by a large-effect D locus on chromosome 5. In this study, the D locus was mapped to a 509-kb interval, with two markers, 5dC720 and 5C1019, co-segregating with the non-acid/acid trait of peach fruit. Within this interval, a candidate gene encoding a putative small protein, designated PpRPH, showed a consistency between gene expression and fruit acidity, with up- and down-regulation in non-acidic and acidic fruits, respectively. Transient ectopic expression of PpRPH in tobacco leaves caused an increase of pH by approximately 40% compared to the control transformed with empty vector. Whereas, the concentrations of citrate and malate decreased significantly by 22% and 37%, respectively, with respect to the empty vector control. All these results suggest that PpRPH is a strong candidate gene of the D locus. These findings contribute to our overall understanding of the complex mechanism underlying fruit acidity in peach as well as that in other fruit crops.

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