Plant age (month-old)/positive controls | Plant parts | DPPH free radical scavenging activity (%) | IC50 (μg/mL) | Ferric reducing antioxidant potential (μM of Fe (II)/g) | IC50 (μg/mL) |
---|---|---|---|---|---|
3 | leaf | 57.82 ± 3.29d | 98.5 ± 4.35d | 489.4 ± 20.16d | 119.42 ± 4.55d |
 | stem | 15.46 ± 1.15h | NO | 117.7 ± 6.53i | NO |
 | rhizome | 34.76 ± 3.31g | 110.9 ± 3.67c | 254.0 ± 16.42g | 134.8 ± 5.21c |
6 | leaf | 51.66 ± 3.55e | 121.4 ± 5.16b | 437.1 ± 18.73e | 144.6 ± 4.19b |
 | stem | 16.37 ± 1.12h | NO | 113.6 ± 5.68i | NO |
 | rhizome | 59.41 ± 3.68d | 86.4 ± 4.19e | 429.0 ± 19.42e | 99.7 ± 3.55e |
9 | leaf | 43.18 ± 2.49f | 149.7 ± 5.48a | 377.2 ± 15.27f | 164.1 ± 4.79a |
 | stem | 16.48 ± 1.74h | NO | 127.2 ± 6.46h | NO |
 | rhizome | 76.42 ± 3.29b | 55.8 ± 4.26f | 581.8 ± 22.18b | 62.4 ± 3.28g |
α-tocopherol |  | 84.19 ± 4.68a | 44.8 ± 4.33g | 849.4 ± 24.16a | 49.1 ± 2.77h |
BHT |  | 70.25 ± 2.69c | 58.6 ± 4.75f | 512.1 ± 17.54c | 67.7 ± 3.86f |