Title：
A candidate PpRPH gene of the D locus controlling fruit acidity in peach
Authors：
Corresponding
Author：
Wang Lu, Jiang Xiaohan , ZhaoLi ,Wang Furong , LiuYudi, ZhouHui, He Huaping & HanYuepeng *
Pubyear：
2021
Title of
Journal：
Plant Molecular Biology
Paper
Code：
Volume：
105
Number：
Page：
321–332
Others：
Classification：
Source：
Abstract：
Fruit acidity has a strong impact on organoleptic quality of fruit. Peach fruit acidity is controlled by a large-efect 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 signifcantly 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 fndings 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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