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Table 3 Total flavonoid content and some separated flavonoid compounds from ethanol extract of P. speciosa seed collected from different locations of Malaysia

From: Assessment and comparison of phytochemical constituents and biological activities of bitter bean (Parkia speciosa Hassk.) collected from different locations in Malaysia

Locations Total flavonoids Quercetin Rutin Kaempferol Catechin Luteolin Myricetin
Perak 12.4 ± 3.51a 2.71 ± 0.69a 1.80 ± 0.29a 0.66 ± 0.09a 1.48 ± 0.59a 1.00 ± 0.19a 0.76 ± 0.22a
Negeri Sembilan 9.2 ± 1.49b 2.15 ± 0.49a 1.91 ± 0.38a 0.42 ± 0.04b 1.15 ± 0.24a 0.66 ± 0.05b 0.27 ± 0.02c
Johor 7.4 ± 1.88c 1.47 ± 0.38b ND ND 0.90 ± 0.33b 0.49 ± 0.01c 0.42 ± 0.03b
  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 per gram DM and mg per gram DM
  2. ND not detected