Study on the Effect of Different Additives on the yield of Polysaccharide in Cordyceps Militaris Liquid Culture

The influences on polysaccharide yield of cordyceps militaris was studed by adding 6 kinds polysaccharide precursor to the liquid fermentation medium,the results demonstrated the effects of 6 precursors on the yield of cordyceps sinensis polysaccharide as follows, glucose> mannose> galactose> arabinose> sorbose> fructose. Glucose and mannose are the most suitable precursors for the production of Cordyceps militaris Polysaccharide. The optimum addition is 20g/L,and the optimum addition of galactose, Arabia sugar and sorbose is 15g/L.The best combination of the four precursors of the highest yield of Cordyceps militaris is glucose 20g/L, Gump sugar 20g/L, galactose 10g/L, Ara The yield of polysaccharide is 5g/L, and the yield of polysaccharide is 270.80mg/g.