蓝光对蛹虫草多糖含量的影响

蛹虫草菌种在两种不同的液体培养基(其中一种添加奶粉)中经摇发酵培养后，再在静置培养过程中以蓝光照射蛹虫草菌丝体，研究蓝光照射对其产生胞内和胞外多糖含量的影响。结果表明，在不含有奶粉的液体培养基表面生长蛹虫草菌丝体，其胞外多糖和胞内多糖含量受蓝光照射的影响而降低；而在培养基中加入奶粉以后，蓝光照射时也可降低胞内多糖的相对含量，但使蛹虫草胞外多糖含量稍有增加。

Effects of Blue Light on Contents of Extracellular and Endocellular Polysaccharides Produced by Cordyceps militaris L.

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.