Table 5.
Enzyme inhibition activities of standards and the methanol extracts from different parts of A. macrocephalus subsp. finitimus x.
| Assays | Aerial Parts | Flowers | Leaves | Roots | Stems | Kojic Acid | Acarbose |
|---|---|---|---|---|---|---|---|
| Inhibition concentration (IC50: mg/mL) | |||||||
| Tyrosinase inhibition | 1.33 ± 0.10 cd | 1.41 ± 0.05 d | 1.02 ± 0.02 b | 1.18 ± 0.01 bc | 1.07 ± 0.03 b | 0.36 ± 0.04 a | - |
| α-Amylase inhibition | 3.40 ± 0.02 b | 4.94 ± 0.15 d | 3.36 ± 0.18 b | 3.50 ± 0.03 b | 4.12 ± 0.22 c | - | 1.24 ± 0.06 a |
| Enzyme inhibitory activities | |||||||
| Tyrosinase inhibition (mg KAEs/g extracts) | 270 ± 20 cd | 255 ± 8 d | 352 ± 7 a | 304 ± 3 bc | 336 ± 9 ab | - | - |
| α-Amylase inhibition (mg ACEs/g extracts) | 357 ± 2 a | 245 ± 8 c | 362 ± 20 a | 347 ± 3 a | 294 ± 16 b | - | - |
x Within each row, means sharing the different superscripts show comparison between the samples using Tukey’s test at p < 0.05. IC50 (mg/mL), inhibition concentration at which 50% of the α-amylase and tyrosinase activities were inhibited. “-” not determined. ACEs and KAEs, acarbose and kojic acid equivalents, respectively.