Bioactive microconstituents and antioxidant properties of wild edible mushrooms from the island of Lesvos, Greece

► Up to 19 polyphenols and two terpenic acids were determined in five wild edible mushroom species from Lesvos Island, Greece. ► Ergosterol predominated among mushrooms' sterols, at concentrations ranging from 9 to 18 mg/100 g fresh weight. ► All mushroom extracts exerted antiradical, antioxidant and ferrous ion chelating capacities. ► Polyphenols were mainly responsible for the antiradical and reducing activities of mushroom extracts. ► The Fe2+-binding ability of mushroom extracts was attributed mainly to terpenic acids, proteins and carbohydrates.