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[Study on monosaccharide composition of intracellular polysacchride and contents of cordycepin and cordyceps polysacchride produced by Cordyceps militaris induced by blue light].

OBJECTIVE
To study effects of blue light irradiation on monosaccharide composition of intracellular polysacchride and contents of cordycepin and cordyceps polysacchride of mycelium and sporocarp in Cordyceps militaris.


METHODS
The monosaccharide composition of intracellular polysacchride of mycelium and sporocarp in Cordyceps militaris as materials were determined by gas chromatography after 144 h blue light irradiation. The contents of cordycepin and cordyceps polysacchride of mycelium and sporocarp in Cordyceps militaris were detected at different blue light irradiation periods. At the same time, the growth of mycelium and sporocarp in Cordyceps militaris were observed during blue light irradiation.


RESULTS
Mycelium polysaccharide in Cordyceps militaris was a kind of heteropolysaccharide containing four kinds of monosaccharide and fruiting body polysaccharide was a kind of heteropolysaccharide containing five kinds of monosaccharide. Whether blue light irradiation or dark culture, the content changes of cordyceps polysacchride in two groups showed similar patterns in the test of mycelium polysaccharides. The content changes of cordyceps polysacchride in two groups were basically the same in the detection of sporocarp polysacchride. Cordycepin content in the two set of experiments of blue light irradiation all showed a clear upward trend in the detection of mycelium and sporocarp in Cordyceps militaris.


CONCLUSION
The blue light irradiation has certain effect on the species and quantity of monosaccharide in intracellular polysaccharide. The content increase of cordycepin and cordyceps polysacchride in Cordyceps militaris are promoted by blue light irradiation. Blue light can help the morphogenesis and promote the differentiation and growth of sporocarp in Cordyceps militaris. This study is the first report about the effect of blue light on the type and quantity of the monosaccharide composition in polysaccharide of Cordyceps militaris, which will lay the foundation for further study on the metabolism of active substance in Cordyceps militaris by blue light irradiation.