Fig. 2

The tissue-specific distribution of the 12 flavonoid compositions from Z. bungeana extracts and their proportions. The legend 1–12 represent the 12 major flavonoids shown in Fig. 1. a The relative abundance of the flavonoids from the root (R), stem (S), leaf (L), and inflorescence (F). The number in the y-axis of the bar chart represents the relative abundance of the flavonoids calculated based on the integrated LC–MS/MS peak area. SEs (Standard Errors) were calculated from three biological replicates. b The relative abundance of R, S, L, and F was added together to acquire the total relative abundance values for each of the 12 flavonoids. For the 12 major flavonoids, the proportion of each flavonoid was shown as the pie chart