Antioxidant activities of crude polysaccharides from four valuable edible fungi
To compare the antioxidant activities in vitro of polysaccharides from Boletus edulis,Morchella esculenta,Tricholoma matsutake and Tuber indicum,the anti-oxidation of polysaccharides were evaluated by DPPH radical scavenging activities,hydroxyl free radical scavenging activities,ferrous ion chelating abilities and reducing activities.The results showed that four different polysaccharides had certain abilities of antioxidant ac-tivities.T.indicum showed the most potent capacity for scavenging DPPH and ferrous ion chelating ability with EC50 values reaching 0.86 mg·mL-1 and 0.63 mg·mL-1,respectively.M.esculenta showed the most potent capacity for scavenging hydroxyl radical with EC50 values reaching 0.38 mg·mL-1.B.edulis showed the most potent capac-ity for reducing activity with EC50 values reaching 0.85 mg·mL-1.The capacity for scavenging DPPH and hy-droxyl radical of T.matsutake was the lowest among the four fungi and its ferrous ion chelating ability was also lower.