Cellulolytic and Xylanolytic Potential of High ?-Glucosidase-Producing Trichoderma from Decaying Biomass [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 581.3 +Genetics and evolution

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2014

Mô tả vật lý: Size: p. 1581-1598 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 263783

Availability, cost and efficiency of microbial enzymes for lignocellulose bioconversion are central to sustainable biomass ethanol technology. Fungi enriched from decaying biomass and surface soil mixture displayed an array of strong cellulolytic and xylanolytic activities. Strains SG2 and SG4 produced a promising array of cellulolytic and xylanolytic enzymes including ?-glucosidase, usually low in cultures of Trichoderma species. Nucleotide sequence analysis of internal transcribed spacer 2 (ITS2) region of rRNA gene revealed that strains SG2 and SG4 are closely related to Trichoderma inhamatum, Trichoderma piluliferum and Trichoderma aureoviride. Trichoderma sp. SG2 correspondingly displayed as much as 9.84�1.12, 48.02�2.53 and 30.10�1.11 units mL-1 of cellulase, xylanase and ?-glucosidase. Ten times dilution of culture supernatant of strain SG2 revealed that activities were about 5.34, 8.45, and 2.05 orders of magnitude higher than observed in crude culture filtrate for cellulase, xylanase, and ?-glucosidase respectively, indicating that more enzymes are present to contact with substrates in biomass sacharification. In parallel experiments Trichoderma species SG2 and SG4 produced more ?-glucosidase than the industrial strain Trichoderma reesei RUT-C30. Results indicate that strains SG2 and SG4 have potential for low cost in-house production of primary lignocellulose-hydrolyzing enzymes for production of biomass saccharides and biofuel in the field.
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