Table 3 Comparisons of total phenols, flavonoids, matrine, oxymatrine, ferric reducing antioxidant power (FRAP) and trolox equivalent antioxidant capacity (TEAC) in roots of S. flavescens populations ^a

41.49 ± 2.97 b

4.37 ± 1.12 b

19.72 ± 3.13 a

4.26 ± 0.82 a

19.52 ± 1.89 bc

314.90 ± 8.93 b

53.22 ± 4.10 a

6.48 ± 0.58 a

13.99 ± 2.60 ab

1.72 ± 0.38 b

25.01 ± 1.72 a

283.57 ± 11.81 c

35.31 ± 3.85 c

3.17 ± 1.83 c

12.75 ± 2.83 b

1.14 ± 0.44 bc

23.20 ± 3.19 ab

364.06 ± 10.62 a

32.38 ± 4.67 c

2.39 ± 1.14 c

10.14 ± 1.74 b

0.61 ± 0.16 c

19.44 ± 3.59 c

365.42 ± 9.48 a