Table 1. Contents of active components in different samples (mg/g) (n = 3).

Component	S1	S2	S3	S4
Danshensu	0.91±0.12	0.34±0.02	1.85±0.14	0.16±0.01
Caffeic acid	0.12±0.02	0.58±0.02	0.53±0.02	-
Rosmarinic acid	21.77±1.42	25.58±1.35	1.26±0.01	2.27±0.18
Salvianolic acid B	1.45±0.17	51.40±2.41	24.16±1.36	18.69±0.12
Dihydrotanshinone I	0.28±0.01	-	-	0.72±0.04
Cryptotanshinone	1.70±0.01	-	-	0.40±0.02
Tanshinone I	2.96±0.11	-	-	0.97±0.03
Tanshinone IIA	12.60±0.83	-	-	2.66±0.15

S1: the red roots of S. castanea Diels f. tomentosa Stib; S2: the hydroponic roots of S. miltiorrhiza; S3: the white roots of S. miltiorrhiza; S4: the red roots of S. miltiorrhiza. Three biological replications of each sample were performed. The results were represented by their means ± standard deviation (S.D.).