Pregledni rad
Biotechnological Wood Modification with Selective White-Rot Fungi and Its Molecular Mechanisms
Karin Fackler
; Competence Centre for Wood Composites and Wood Chemistry (Wood K plus), St. Peter Straße 25, A-4021 Linz, Austria
Cornelia Gradinger
; Competence Centre for Wood Composites and Wood Chemistry (Wood K plus), St. Peter Straße 25, A-4021 Linz, Austria
Marieke Schmutzer
; Competence Centre for Wood Composites and Wood Chemistry (Wood K plus), St. Peter Straße 25, A-4021 Linz, Austria
Crtomir Tavzes
; University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Rozna dolina, Cesta VIII/34, SI-1000 Ljubljana, Slovenia
Ingo Burgert
; Department of Material Sciences and Process Engineering, BOKU – University of Natural Resources and Applied Life Sciences, Peter Jordan Strasse 82, A-1190 Vienna, Austria
Manfred Schwanninger
; Department of Chemistry, BOKU – University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
Barbara Hinterstoisser
; Department of Material Sciences and Process Engineering, BOKU – University of Natural Resources and Applied Life Sciences, Peter Jordan Strasse 82, A-1190 Vienna, Austria
Takashi Watanabe
; Laboratory of Biomass Conversion, Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho Uji, Kyoto 611-0011, Japan
Kurt Messner
; Institute of Chemical Engineering, Vienna University of Technology, Getreidemarkt 9/166, A-1060 Vienna, Austria
Sažetak
Microbial mechanisms of lignin degradation may be utilised for solid-state fermentations other than biopulping, during which the selective conversion of lignin is required. The current paper reviews current work into selective lignin conversion, with emphasis on the contributions made by our research group, which consists of researchers from five different laboratories. Three of them cooperate within Wood K plus. The recent research of this group has focussed on fermentations utilising the unique metabolism of selective white-rot fungi to modify wood surfaces during relatively short fermentation times of less than one week and on research into the molecular mechanisms causing these modifications. Lignin degradation by selective fungi (e.g. Ceriporiopsis subvermispora and species of the genus Phlebia) on the wood surfaces was significant after three days. After seven days the overall lignin content of spruce wood shavings was reduced by more than 3.5 %. Lignin loss was accompanied by an increase of extractable substances. To evaluate small changes and to trace the fungal modification processes, Fourier transform infrared spectroscopic (FTIR) techniques and electron paramagnetic resonance (EPR) spectroscopy were applied and adapted. The spectra recorded in the near infrared region (FT-NIR) turned out to be very useful for kinetic studies of the biopulping/biomodification processes and a good method to evaluate the capabilities of fungi to modify wood surfaces within this short period.
Ključne riječi
white-rot fungi; wood; lignin; biomodification; FT-NIR; EPR
Hrčak ID:
24174
URI
Datum izdavanja:
14.9.2007.
Posjeta: 3.437 *