Biodegradation of Chilean native wood species, Drimys winteri and Nothofagus dombeyi, by Ganoderma australe

Drimys winteri and Nothofagus dombeyi, two native Chilean wood species with high potential for pulp production, were biodegraded by Ganoderma australe. This fungus is known to provoke extensive and selective biodelignification of these wood species in the field. Under laboratory conditions, N. dombe...

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Bibliographic Details
Published in:World journal of microbiology & biotechnology 2001-08, Vol.17 (6), p.577-581
Main Authors: ELISSETCHE, Juan-Pedro, FERRAZ, André, PARRA, Carolina, FREER, Juanita, BAEZA, Jaime, RODRIGUEZ, Jaime
Format: Article
Language:English
Subjects:
Biodegradation
Biological and medical sciences
Biotechnology
Drimys winteri
Fundamental and applied biological sciences. Psychology
Ganoderma australe
Indigenous species
Industrial applications and implications. Economical aspects
Lignin
Other applications
Sodium hydroxide
Solubility
Wood
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Summary:Drimys winteri and Nothofagus dombeyi, two native Chilean wood species with high potential for pulp production, were biodegraded by Ganoderma australe. This fungus is known to provoke extensive and selective biodelignification of these wood species in the field. Under laboratory conditions, N. dombeyi underwent higher weight and component losses than D. winteri. In neither case was the lignin removal selective, because glucan loss was almost simultaneous with lignin degradation. The decayed wood chips became progressively discoloured throughout the biodegradation time. The brightness increase was only partly reversed in thermal reversion assays. Nothofagus dombey solubility in 1% NaOH increased by 13.7% after 9 weeks of biodegradation, while D. winteri solubility increased by 14.2% in a shorter period (6 weeks). In both cases, the solubility increase was proportional to the liquor absorbance increase at 272 nm, which indicates that the wood solubility in 1% NaOH was dependent of lignin solubilization.[PUBLICATION ABSTRACT]
ISSN:0959-3993
1573-0972
DOI:10.1023/A:1012421513564