The cellulase components produced by the symbiotic fungus Leptographium qinlingensis of Dendroctonus armandi and the optimum conditions were studied by single factor and orthogonal experiment. Furthermore the characteristics of each cellulase component were tested and the gene of major cellulase CX was cloned through PCR. Subsequently the sequence of the gene fragment was analyzed. The main results were as follows:
1. Leptographium qinlingensis had a complete cellulase system which can excrete...