Table 1.

α-glucosidase activity of methanolic extracts of different medicinal plants and Acarbose (standard drug)

Plant	Percentage α-glucosidase inhibition (%)						IC 50 (μg/mL)
	12.5 μg/mL	25 μg/mL	50 μg/mL	100 μg/mL	200 μg/mL	400 μg/mL
Acarbose (Standard)	18.83 ± 3.87b	30.18 ± 0.06b	42.43 ± 0.05b	56.31 ± 0.02b	80.10 ± 0.15b	89.40 ± 0.09a	66.07
Cornus capitata (Leaves)	63.68 ± 1.98a	97.81 ± 0.03a	98.37 ± 0.12a	97.43 ± 0.18a	97.18 ± 0.18a	94.70 ± 0.41a	12.5
Clematis grata (Whole plant)	0.32 ± 5.79b	4.83 ± 1.46c	5.05 ± 0.74d	5.65 ± 0.75b	8.72 ± 5.09c	13.25 ± 1.10b	–
Roylea cinerea (Leaves)	8.66 ± 0.20b	9.87 ± 0.16c	10.50 ± 0.66c	14.62 ± 4.20b	15.31 ± 2.60c	20.09 ± 2.21b	–
Roylea cinerea (Stem)	5.85 ± 1.50b	6.54 ± 3.04c	7.01 ± 1.23d	8.69 ± 1.87b	12.57 ± 2.97c	13.61 ± 2.10b	–

Values are mean ± S.E. of three parallel measurements

Different letters indicate significant differences between same concentrations of different extracts and acarbose (p < 0.05, Tukeys HSD test, F-ratio- 63.89 (12.5 μg/mL), 687.88 (25 μg/mL), 3.24E3 (50 μg/mL), 13.29 (100 μg/mL), 212.97 (200 μg/mL), 291.66 (400 μg/mL)

Cornus capitata (4.25% at 1.5 μg/mL; 6% at 3.1 μg/mL and 19% inhibition at 6.25 μg/mL concentration)