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Table 1 Total flavonoid content and individual flavonoid compounds from leaf, stem and rhizome extracts of  Z. zerumbet

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) Plant parts Total flavonoids Quercetin Rutin Kaempferol Catechin Luteolin Myricetin
3 leaf 21.8 ± 3.74b 2.43 ± 0.69b 1.77 ± 0.26c 0.71 ± 0.09a 5.49 ± 0.45b 1.15 ± 0.14a ND
  stem 4.7 ± 0.68e 0.12 ± 0.05e 0.36 ± 0.07g ND 1.14 ± 0.10h ND ND
  rhizome 11.2 ± 1.26d 1.63 ± 0.41c 0.81 ± 0.09e 0.49 ± 0.04b 2.69 ± 0.29f 0.44 ± 0.03c 0.59 ± 0.03c
6 leaf 19.1 ± 2.69b 2.26 ± 0.52b 1.28 ± 0.32d 0.51 ± 0.04b 4.12 ± 0.21d 0.82 ± 0.06b 0.25 ± 0.02e
  stem 4.2 ± 0.65e 0.16 ± 0.05e 0.21 ± 0.04h ND 1.34 ± 0.11g ND ND
  rhizome 19.6 ± 3.48b 2.49 ± 0.33b 2.19 ± 0.41b 0.68 ± 0.07a 4.68 ± 0.27c 0.76 ± 0.07b 0.97 ± 0.06b
9 leaf 15.2 ± 2.68c 1.82 ± 0.24c 0.66 ± 0.08f 0.50 ± 0.03b 3.37 ± 0.41e 0.45 ± 0.01c 0.33 ± 0.01d
  stem 4.1 ± 0.66e 0.22 ± 0.06d 0.24 ± 0.07h 0.12 ± 0.01c 1.02 ± 0.06i ND 0.11 ± 0.02f
  rhizome 29.7 ± 4.11a 3.94 ± 0.81a 2.79 ± 0.48a 0.72 ± 0.05a 6.12 ± 0.32a 1.06 ± 0.11a 1.19 ± 0.11a
  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. The units of total flavonoids and flavonoid compounds are mg quercetin equivalents/g DM and mg/g DM, respectively. ND: not detected