Table 3.
Enzyme inhibitory effects of the volatile extracts of Astragalus species.
| Samples | AChE Inhibition (mg GALAE/g Oil) |
BChE Inhibition (mg GALAE/g Oil) | Tyrosinase Inhibition (mg KAE/g Oil) |
Amylase Inhibition (mmol ACAE/g Oil) |
|---|---|---|---|---|
| A. sieversianus | 4.55 ± 0.09 a | 3.61 ± 0.33 a | 118.20 ± 3.53 d | 0.84 ± 0.04 a,b |
| A. mucidus | 4.48 ± 0.04 a | 3.61 ± 0.33 a | 124.75 ± 1.23 c | 0.90 ± 0.02 a |
| A. macronyx | 4.01 ± 0.13 b | 1.04 ± 0.09 d | 132.14 ± 0.81 b | 0.89 ± 0.04 a,b |
| A. lehmannianus | 4.51 ± 0.07 a | 3.12 ± 0.36 a,b | 138.42 ± 0.66 a | 0.95 ± 0.09 a |
| A. chiwensis | 4.52 ± 0.07a | 2.79 ± 0.25 b,c | 132.79 ± 1.04 b | 0.76 ± 0.04 b |
| A. campylotrichus | 4.11 ± 0.15 b | 2.08 ± 0.34 c | 131.80 ± 1.11 b | 0.85 ± 0.09 a,b |
Values expressed as means ± S.D. of three parallel measurements. GALAE: Galanthamine equivalent; KAE: Kojic acid equivalent; ACAE: Acarbose equivalent. Superscripts within a column indicate significant difference in Astragalus species (p < 0.05).