Abstract:

Using two different kinds of liquid culture medium with milk powder or not, Cordyceps militari L. was cultured in shaking flasks for several days, and then transferred to still culture and radiated by blue light. As a consequence, a great deal of mycelia was reproduced on the surface of motionless medium and exposed to the blue light directly. It was proved that the contents of endocellular and extracellular polysaccharide are influenced by blue light. When the mycelia of Cordyceps militari L. on the surface of medium without no milk powder is exposed to blue light, the contents of extracellular and endocellular polysaccharides produced by Cordyceps militari L. are lower than those produced by the strain in dark. When milk powder is added to liquid culture medium, blue light also resulted in a decrease of endocellular polysaccharide in the mycelia of Cordyceps militari L., but an increase of extracellular polysaccharide of Cordyceps militari L. compared to the control in dark.

Key words: blue light, cordyceps militaris L., polysaccharide