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Mechanism of antibacterial activity of the white-rot fungus Hypholoma fasciculare colonizing wood
Netherlands Institute of Ecology.
Netherlands Institute of Ecology.
Netherlands Institute of Ecology.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0002-6471-143X
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2010 (English)In: Canadian journal of microbiology (Print), ISSN 0008-4166, E-ISSN 1480-3275, Vol. 56, no 5, 380-388 p.Article in journal (Other academic) Published
Abstract [en]

In a previous study it was shown that the number of wood-inhabiting bacteria was drastically reduced after colonization of beech (Fagus sylvatica) wood blocks by the white-rot fungus Hypholoma fasciculare, or sulfur tuft (Folman et al. 2008). Here we report on the mechanisms of this fungal-induced antibacterial activity. Hypholoma fasciculare was allowed to invade beech and pine (Pinus sylvestris) wood blocks that had been precolonized by microorganisms from forest soil. The changes in the number of bacteria, fungal biomass, and fungal-related wood properties were followed for 23 weeks. Colonization by the fungus resulted in a rapid and large reduction in the number of bacteria (colony-forming units), which was already apparent after 4 weeks of incubation. The reduction in the number of bacteria coincided with fungal-induced acidification in both beech and pine wood blocks. No evidence was found for the involvement of toxic secondary metabolites or reactive oxygen species in the reduction of the number of bacteria. Additional experiments showed that the dominant bacteria present in the wood blocks were not able to grow under the acidic conditions (pH 3.5) created by the fungus. Hence our research pointed at rapid acidification as the major factor causing reduction of wood-inhabiting bacteria upon colonization of wood by H. fasciculare.

Place, publisher, year, edition, pages
NRC Research Press , 2010. Vol. 56, no 5, 380-388 p.
Keyword [en]
white rot, antibacterial activity, acidification, lignocellulolytic enzymes, organic chlorine, pyrolysis
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:liu:diva-56778DOI: 10.1139/W10-023OAI: oai:DiVA.org:liu-56778DiVA: diva2:322094
Available from: 2010-06-03 Created: 2010-06-03 Last updated: 2017-12-12

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Svensson, TeresiaBastviken, DavidÖberg, Gunilla

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