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Lignin degradation by white rot fungi on spruce wood shavings during short-time solid-state fermentations monitored by near infrared spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
18472 42724 2006 8 PDF Available
Title
Lignin degradation by white rot fungi on spruce wood shavings during short-time solid-state fermentations monitored by near infrared spectroscopy
Abstract

Due to their outstanding capability of degrading the recalcitrant biomacromolecule lignin, white rot fungi have been attracting interest for several technological applications in mechanical pulping and wood surface modification. However, little is known about the time course of delignification in early stages of colonisation of wood by these fungi. Using a Fourier transform near infrared (FT-NIR) spectroscopic technique, lignin loss of sterilised spruce wood shavings (0.4–2.0 mm particle size) that had been degraded by various species of white rot fungi could be monitored already during the first 2 weeks. The delignification kinetics of Dichomitus squalens, three Phlebia species (Phlebia brevispora, Phlebia radiata and Phlebia tremellosa), three strains of Ceriporiopsis subvermispora as well as the white rot ascomycete Hypoxylon fragiforme and the basidiomycete Oxyporus latemarginatus were determined. Each of the fungi tested was able to reduce the lignin content of spruce wood significantly during the first week. The amount of delignification achieved by the selected white rot fungi after 2 weeks ranged from 7.2% for C. subvermispora (FPL 105.752) to 2.5% for P. radiata. Delignification was significant (P = 95%) already after 3 days treatment with C. subvermispora and P. tremellosa. Activities of extracellular ligninolytic enzymes (laccase, manganese peroxidase and/or lignin peroxidase), expressed by each of the tested fungi, were determined. Lignin was degraded when peroxidase activity was detected in the fungal cultures, but only a low level of correlation between enzyme activities and the extent of delignification was found.

Keywords
Lignin; White rot fungi; FT-NIR; Peroxidase; Laccase; Softwood; Picea abies
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Lignin degradation by white rot fungi on spruce wood shavings during short-time solid-state fermentations monitored by near infrared spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 39, Issue 7, 3 November 2006, Pages 1476–1483
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us