Isolation and Screening of Silkworm Puparium Chitin Degradation Strains and the Optimization of Chitinase-produce Conditions

[Objective] The aim of this study was to optimize the conditions of chitinase-produce strains.[Method] A kind of screened chitinase-produce strain G-254 was habituated cultured,and then the single factor experiment was carried out to explore the effects of different carbon source,nitrogen source and inorganic salt on the activity of produced chitinase;the response surface test was used to determine the optimal conditions for chitinase production.[Result] The optimal conditions for chitinase production were: 8% of glucose,5% of beef extract and 0.07% of MgSO4,and the activity of chitinase reached the maximal value(6.86 U) under these conditions.[Conclusion] The study improved the activity of chitinase produced by strain G-254 and provided good foundation for industrial production.