Abstract
ABSTRACTSimultaneous production of xylanase and pectinase by Bacillus pumilus AJK under submerged fermentation was investigated in this study. Under optimized conditions, it produced 315 ± 16 IU/mL acidic xylanase, 290 ± 20 IU/mL alkaline xylanase, and 88 ± 9 IU/mL pectinase. The production of xylano-pectinolytic enzymes was the highest after inoculating media (containing 2% each of wheat bran and Citrus limetta peel, 0.5% peptone, 10 mM MgSO4, pH 7.0) with 2% of 21-hr-old culture and incubated at 37°C for 60 hr at 200 rpm. Xylanase retained 100% activity from pH 6.0 to10.0 after 3 hr of incubation, while pectinase showed 100% stability from pH 6.0 to 9.0 even after 6 hr of incubation. Cost-effective and concurrent production of xylanase and pectinase by a bacterial isolate in the same production media suggests its potential for various biotechnological applications. This is the first report of simultaneous production of industrially important extracellular xylano-pectinolytic enzymes by B. pumilus.
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