Figure 2

Dynamic changes of coumarin content in seven developmental stages of HBZ and QBZ, and PCA of HBZ and QBZ (A Total coumarins; B Content of oxypeucedanin hydrate, imperatorin, phellopterin, and bergapten; C Content of isoimperatorin, oxypeucedanin, byakangelicol, and byakangelicin; D PCA of HBZ and QBZ. Data are means ± SD. *p < 0.05; **p < 0.01; ***p < 0.001).