Pan-genome analysis of the P-type ATPase gene family in Prunus mume and functional characterization of PmAHA3 in organic acid accumulation.
Lin X, Guo S, Yang R, Xu W, Cheng D
Crispr
Breeders working with ornamental plums and apricots now have a precise genetic dial for tuning fruit sourness — meaning the next generation of these trees could be selected for exactly the flavor balance you want in homemade umeboshi or fruit wine.
Japanese apricot fruit gets its sharp, sour taste from acids stored inside fruit cells. Researchers found a specific protein — a kind of molecular pump — that moves these acids into storage. When they switched that pump off using modern gene-editing tools, the fruit produced significantly less malic and citric acid, proving this one protein is a major controller of fruit tartness.
Key Findings
49 P-type ATPase genes were catalogued across the Japanese apricot pan-genome, organized into 6 functional subfamilies with 29 core genes shared across all varieties.
Gene family expansion was driven primarily by whole-genome duplication and dispersed duplication events, with most genes under strong negative (purifying) selection.
Silencing or knocking out PmAHA3 via RNAi and CRISPR/Cas9 significantly reduced both malic acid and citric acid content in fruit, confirming its role in organic acid accumulation.
chevron_right Technical Summary
Scientists identified 49 genes in Japanese apricot (Prunus mume) that control how the fruit pumps acids into its cells, then used gene-editing to confirm that one gene, PmAHA3, directly governs the tartness of the fruit by regulating malic and citric acid levels.
Abstract Preview
Organic acid accumulation is a key determinant of fruit flavor and processing quality in Prunus mume, yet its underlying molecular mechanisms remain poorly understood. P-type ATPases are membrane p...
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Prunus mume, also known as a Chinese plum, is a tree species in the family Rosaceae. It is also referenced by its flowers as plum blossom. Although referred to as a plum in English, it is classified in the Armeniaca section of the genus Prunus, making it an apricot. Mei flowers, or meihua (梅花), w...