The Effects of Wheat Bran Composition on the Production of Biomass-Hydrolyzing Enzymes by Penicillium decumbens |
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Authors: | Xianyun Sun Ziyong Liu Yinbo Qu Xuezhi Li |
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Institution: | (1) State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, China |
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Abstract: | The effects of the starch, protein, and soluble oligosaccharides contents in wheat bran on the extracellular biomass-hydrolyzing
enzymes activities released by Penicillium decumbens mycelia grown in batch fermentations have been examined. The results showed increased starch content correlated directly
with an increase in released amylase activity but inversely with the levels of secreted cellulase and xylanase. High amounts
of protein in wheat bran also reduced the activities of cellulase, xylanase and protease in the culture medium. The effects
of the soluble and insoluble components of wheat bran and cello-oligosaccharides supplements on production of extracellular
cellulase and xylanase were compared. The soluble cello-oligosaccharides compositions in wheat bran were proved to be one
of the most significant factors for cellulase production. According to the results of this research, determining and regulating
the composition of wheat bran used as a fermentation supplement may allow for improved induction of cellulase and xylanase
production. |
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Keywords: | Penicillium decumbens Wheat bran Biomass Cellulase Xylanase |
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