Extraction and Antioxidant Activities of Polysaccharides from Pileus of Dictyophora rubrovalvata

Effects of different factors on extraction of polysaccharides from pileus of Dictyophora rubrovalvata were studied.The antioxidant activities of polysaccharides were evaluated.The extraction technology using water was optimized by orthogonal experiment.The optimum conditions were: extraction temperature 85℃,ratio of material to water 1∶25,extraction time 2.5h.Under the optimized experiment conditions,extractive yield was 8.25%.Polysaccharides were composed of glucose,mannose and galactose.Mass concentration of glucose content was the highest(58.19%).Polysaccharides of pileus had high reducing power and scavenging hydroxyl radical activity.The reducing power and scavenging hydroxyl radical activity increased with the concentration of polysaccharides increased.However,scavenging superoxide anion radical of polysaccharides was weak.