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Table 3 DPPH and FRAP scavenging activities (at concentration of 100 μg/mL) and IC50 value of Z. zerumbet extracts

From: Variation in secondary metabolite production as well as antioxidant and antibacterial activities of Zingiber zerumbet (L.) at different stages of growth

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

  1. Data are means of triplicate measurements ± standard deviation. Means not sharing a common single letter in each column for each measurement were significantly different at P ≤ 0.05. NO: not observed