Figure 2.

Primary metabolite profiles of the fruits of ‘Zhongtaojinkui’ and ‘Zhongtaohongyu’ from two peach-producing areas at different altitudes. (A) Result of PCA for four metabolome datasets. (B) Classification and proportion of metabolites detected in all samples. (C) Differentially accumulated metabolites of XD-JK and XD-HY, relative to LQ-JK and LQ-HY, respectively. (D,E) KEGG pathway enrichment analysis of differentially accumulated metabolites in ‘Zhongtaojinkui’ and ‘Zhongtaohongyu’ from two peach-producing areas at different altitudes. (F) Profiles of organic acids in the fruits of ‘Zhongtaojinkui’ and ‘Zhongtaohongyu’ from two peach-producing areas at different altitudes.