Fig. 5

The phenylpropanoid and flavonoid biosynthesis pathways in pomegranate pericarps under sunburn stress. The biosynthetic pathway of phenylpropanoid and flavonoid referring to the KEGG database (https://www.kegg.jp/kegg-bin/show_pathway?map00940, https://www.kegg.jp/kegg-bin/show_pathway?map00941) [46]. Expression patterns of genes in the phenylpropanoid and flavonoid biosynthesis pathways shown as a heatmap. The three on the left represent healthy fruit, and the three on the right represent sunburned fruit. The red indicates higher and the blue indicates lower. The compounds up-regulated in the metabolome analysis are marked by red arrows, and the compounds down-regulated are marked by green arrows