Abstract
Various nitrogen and carbon sources were examined as inducers of the production of endoxylanase and β-xylosidase by Trametes trogii. T. trogii grown on xylan plus crystalline cellulose provided supernatants with the highest enzymatic activities. Organic nitrogen sources (especially asparagine and casamino acids) were the best for enzyme production. The increase in xylan concentration stimulated endoxylanase production whereas significant differences were not attained in β-xylosidase production with more than 5g xylan/l in the culture medium. pH 4.0 was optimal for endoxylanase production, while β-xylosidase production was maximum at pH 5.5. Temperatures in the range of 23–28°C stimulated enzyme production. The endoxylanase activity in the crude culture filtrate was greatest at 50°C and pH around 5.0. The optimum pH and temperature for β-xylosidase activity were 5.5 and 50°C respectively.
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