EXOPOLYSACCHARIDE PRODUCTION AND ITS BIOACTIVITIES OF THE EDIBLE PLEUROTUS OSTREATUS IN SUBMERGED CULTURE

摘要

Submerged cultures were used to study the influence of? various carbon sources on the mycelial biomass and exopolysaccharide production of? Pleurotus? ostreatus. The antimicrobial and antioxidant activity of?? the exopolysaccharide were also determined.?? The yield of? mycelial biomass of? 7.06 g/l, 5.12 g/l, 4.66 g/l, and 2.96 g/l was obtained by utilization of? maltose, glucose,? lactose? and? starch? as? a? carbon? source,? respectively.? Furthermore,? in? the medium containing maltose, lactose, glucose, and starch produce 100.05 mg/l, 97.73 mg/l, 78.63 mg/l, and 70.45 mg/l of? exopolysaccharide, respectively.? The assay of? antimicrobial and antioxidant activity showed that the exopolysaccharide is more active to inhibit the growth of? B. subtilis rather? than? those? of? E.? coli? and? S.? cerevisiae. Furthermore,? the? exopolysaccharide was? also indicated? to have antioxidant activity. Key words: Pleurotus ostreatus, exopolysaccharide, antimicrobial activity, antioxidant activity