Effect of penicillium mutation by UV and gamma radiation on xylanase production

Many microorganisms produce enzymes which have importance in industrial processes. Usually this production, is not sufficient for these needs at economical level. The bioindustry concentrates on increasing the production of these enzymes. This leads to the progress of this kind of industry, which use different biotechnology means, for example mutation and screening to choice more potent strain. In this study Ultra Violet and Gamma irradiation conducted on Penicillium canescen in order to produce new mutant strains, have the ability to produce more xylanase enzyme for industrial uses. Ultra Violet irradiation enable to select five mutant strains having more enzyme production ability. The best mutant strain PCUV12 (159 unit/ml) was 40% higher than the mother strain, at the dose 150.72 j/cm2. Gamma radiation produced new mutant strain PCGR6 which produced 26% more enzyme than the mother strain at dose 250 Gy.(author)