Fig. 3
From: Effect of IAA on coumarins synthesis in Angelica dahurica under soil compactness stress

Coumarins HPLC chart and content. HPLC diagram of the reference substance (A) and tissue samples of A. dahurica (B) (1.7-Hydroxycoumarine; 2.byakangelicin; 3.bergapten; 4.oxypeucedanin;5. imperatorin; 6.phellopterin; 7.isoimperatorin).Changes in total coumarins content in the taproots (C) and lateral roots (D) of A. dahurica grown under different soil compactness treatments. LP (low compactness treatment group ,5 kPa), MP (moderate compactness treatment group, 15 kPa) and HP(high compactness treatment group HP, 25 kPa) represent different soil compactness treatment groups respectively. Data are the mean values (n = 3). Letters represent significant differences between treatments (p < 0.05).