In order to ascertain difference in antioxidant activity of the extracts from the fruiting body of brown Agari-cus bisporus at different growth stages , the total polyphenol contents and antioxidant activities of methanolic extracts of the fruiting body at four growth stages including A-young mushroom period , B-normal harvest period , C-open veil pe-riod and D-spore matured period were comprehensively compared .The results indicated that there were significant differences in total polyphenol contents and antioxidant activities among the four growth stages .Extracts from growth stage B demonstrated the highest total polyphenol contents and the best antioxidant activities .
brown Agaricus bisporusfruiting bodygrowth stagetotal polyphenolantioxidant activity