comparative antioxidant activity and total flavonoid content of persian pomegranate (punica granatum l.) cultivars

pomegranate (punica granatum l.), lythraceae, is mainly grown in mediterranean region. it is one of the major cultivated productions of iran, which have been used in folk medicine for many centuries. it has been proved that pomegranate has a high antioxidant activity and is effective in the prevention of atherosclerosis. this study compares the antioxidant activity, total phenolic and flavonoid contents of eight different pomegranate cultivars grown in iran. aqueous solutions of known fe+2 concentration, vitamin e, vitamin c, gallic acid and catechin were used for calibration. the results showed that sour summer pulp cultivar had the most antioxidant effect with significant difference with the other cultivar (p < 0.05) which can be introduced as a potent source of natural antioxidants, and the peel of three cultivars (sweet saveh malas, sour summer and black peel) as a suitable source for extraction and purification of phenolic and flavonoid compound. the antioxidant capacity of pomegranate peel extract is 10 times higher than the pulp extract.