EXOPOLYSACCHARIDE PRODUCTION AND ITS BIOACTIVITIES OF THE EDIBLE PLEUROTUS OSTREATUS IN SUBMERGED CULTURE
AbstractSubmerged cultures were used to study the influence ofÂ various carbon sources on the mycelial biomass and exopolysaccharide production ofÂ PleurotusÂ ostreatus. The antimicrobial and antioxidant activity ofÂ Â the exopolysaccharide were also determined.Â Â The yield ofÂ mycelial biomass ofÂ 7.06 g/l, 5.12 g/l, 4.66 g/l, and 2.96 g/l was obtained by utilization ofÂ maltose, glucose,Â lactoseÂ andÂ starchÂ asÂ aÂ carbonÂ source,Â respectively.Â Furthermore,Â inÂ 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 ofÂ exopolysaccharide, respectively.Â The assay ofÂ antimicrobial and antioxidant activity showed that the exopolysaccharide is more active to inhibit the growth ofÂ B. subtilis ratherÂ thanÂ thoseÂ ofÂ E.Â coliÂ andÂ S.Â cerevisiae. Furthermore,Â theÂ exopolysaccharide wasÂ also indicatedÂ to have antioxidant activity.Key words: Pleurotus ostreatus, exopolysaccharide, antimicrobial activity, antioxidant activityÂ
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