Lignocellulose degradation and enzyme production by Irpex lacteus CD2 during solid-state fermentation of corn stover(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)
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概要
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The white rot fungus Irpex lacteus CD2 was incubated on corn stover under solid-state fermentation conditions for different durations, from 5 days up to 120 days. Lignocellulose component loss, enzyme production and Fe^<3+>-reducing activity were studied. The average weight loss ranged from 1.7% to 60.5% during the period of 5-120 days. In contrast to lignin, hemicellulose and cellulose were degraded during the initial time period. After 15 days, 63.0% of hemicellulose was degraded. Cellulose was degraded the most during the first 10 days, and 17.2% was degraded after 10 days. Lignin was significantly degraded and modified, with acid insoluble lignin loss being nearly 80% after 60 days. That weight loss, which was lower than the total component loss, indicated that not all of the lost lignocellulose was converted to carbon dioxide and water, which was indicated by the increase in soluble reducing sugars and acid soluble lignin. Filter paper activity, which corresponds to total cellulase activity, peaked at day 5 and remained at a high level from 40 to 60 days. High hemicellulase activity appeared after 30 days. No ligninases activity was detected during the incipient stage of lignin removal and only low lignin peroxidase activity was detected after 25 days. Apparently, neither of the enzymatic peaks coincided well with the highest amount of component loss. Fe^<3+>-reducing activity could be detected during all the decay periods, which might play an important role in lignin biodegradation by I. lacteus CD2.
- 公益社団法人日本生物工学会の論文
著者
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Zhang Xiaoyu
Key Lab. Of Molecular Biophysics Of Moe Coll. Of Life Sci. And Technol. Huazhong Univ. Of Sci. And T
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Zhang Xiaoyu
Key Laboratory Of Molecular Biophysics Of Moe College Of Life Science And Technology Huazhong Univer
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Xu Chunyan
Key Laboratory Of Molecular Biophysics Of Moe College Of Life Science And Technology Huazhong Univer
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Ma Fuying
Key Laboratory Of Molecular Biophysics Of Moe College Of Life Science And Technology Huazhong Univer
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Ma Fuying
Key Lab. Of Molecular Biophysics Of Moe Coll. Of Life Sci. And Technol. Huazhong Univ. Of Sci. And T
関連論文
- Decolorization of Anthraquinone-Type Dye by Bilirubin Oxidase-Producing Nonligninolytic Fungus Myrothecium sp. IMER1(ENVIRONMENTAL BIOTECHNOLOGY)
- Lignocellulose degradation and enzyme production by Irpex lacteus CD2 during solid-state fermentation of corn stover(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)