Journal article
Changes in selected enzyme activities during growth of pure and mixed cultures of white-rot decay fungus Trametes versicolor and the potential biocontrol fungus Trichoderma harzianum
Canadian Journal of Microbiology, Vol.38(4), pp.317-323
1992
Abstract
Two filamentous fungi, the white-rot fungus Trametes versicolor and the soil fungus and potential biocontrol organism Trichoderma harzianum, have been grown in pure and mixed cultures on low-N (0.4 mM) and high-N (4 mM) defined synthetic media to determine the activities of selected wood-degrading enzymes such as cellobiase, cellulase, laccase, and peroxidases. Growth characteristics and enzyme activities were examined for potential correlations. Such correlations would allow the use of simple enzyme assays for measuring biomass development and would facilitate predictions about competitiveness of species in mixed fungal cultures. Our results show that while laccase and Poly Red-478 peroxidase activities indicate survival of the decay fungus, none of the monitored extracellular enzymes can serve as a quantitative indicator for biomass accumulation. As expected, the level of available nitrogen affected the production of the enzymes monitored: in low-N media, specific cellobiase, specific cellulase, and peroxidase activities were enhanced, while laccase activities were reduced. Most importantly, laccase activities of Trametes versicolor, and to a smaller extent, cellobiase activities of both fungi, were significantly induced in mixed cultures of Trametes versicolor and Trichoderma harzianum.
Details
- Title
- Changes in selected enzyme activities during growth of pure and mixed cultures of white-rot decay fungus Trametes versicolor and the potential biocontrol fungus Trichoderma harzianum
- Authors
- Michael Freitag (Author)Jeffrey J Morrell (Author)
- Publication details
- Canadian Journal of Microbiology, Vol.38(4), pp.317-323
- Publisher
- Canadian Science Publishing
- Date published
- 1992
- DOI
- 10.1139/m92-053
- ISSN
- 0008-4166
- Organisation Unit
- University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life
- Language
- English
- Record Identifier
- 99450777402621
- Output Type
- Journal article
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