Antioxidant activity, total phenolic and flavonoid content of Ficus deltoidea Jack varieties
Six varieties of Ficus deltoidea Jack namely F. deltoidea Jack var. deltoidea, F. deltoidea Jack var. angustifolia (Miq.) Corner, F. deltoidea Jack var. intermedia Corner, F. deltoidea Jack var bilobata Corner, F. deltoidea Jack var. trengganuensis Corner and F. deltoidea Jack var. kunstleri (King) Corner were collected from various locations in Peninsular Malaysia. The total phenolic content in Ficus deltoidea var. intermedia was remarkably high, followed by varieties kunstleri, trengganuensis, deltoidea and bilobata. The lowest flavonoid content was observed in the angustifolia variety. Antioxidant activity of aqueous extracts was determined by measuring DPPH and H2O2 scavenging activities. Very strong antioxidant activity was observed for the extract of intermedia variety with IC50 of 40µg/mL, whereas moderate activities were recorded in the extracts of bilobata and kunstleri varieties with IC50 of 150 and 200µg/mL, respectively. Low DDPH scavenging activities were observed in the extracts of trengganuensis, deltoidea and angustifolia varieties; with IC50 of 325, 380 and more than 500µg/mL, respectively. Higher H2O2 scavenging activity was observed in all varieties studied, when measured at 500µg/mL as compared to vitamin C.