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Postia placenta decay of acetic anhydride modified wood – effect of leaching
Norwegian Forest and Landscape Institute, Norway.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad.ORCID iD: 0000-0003-2902-2257
2014 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 9, no 3, p. 162-169Article in journal (Refereed) Published
Abstract [en]

It is well established that acetylation of wood by the use of acetic anhydride is able to impart a significant degree of decay resistance. The aim of this work was to study how a standardized leaching procedure with water (EN 84) affected the degradation of acetic anhydride modified samples by the brown rot fungi Postia placenta compared to no leaching prior to incubation. Three different levels (low, medium, and high) of acetic anhydride modified Southern yellow pine (SYP; Pinus spp.) were tested. The samples were harvested after 4 and 28 weeks. Wecompared changes in mass loss, wood moisture content, fungal DNA, and gene expression from five genes. If leaching changes the acetylated samples and makes them more susceptible for fungal deterioration, the expected effect would be higher levels of these parameters. Generally, leaching resulted in few differences between leached and nonleached samples at low levels of acetylation, while no changes were found for the highest acetylation level. No differences were found in gene expressions after 28 weeks. The possible protection of acetylated wood against oxidative fungal degradation is suggested to be interpreted in combination with the lowered wood moisture content.

Place, publisher, year, edition, pages
2014. Vol. 9, no 3, p. 162-169
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6625DOI: 10.1080/17480272.2014.887776Scopus ID: 2-s2.0-84894095088Local ID: 16582OAI: oai:DiVA.org:ri-6625DiVA, id: diva2:964464
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-08-13Bibliographically approved

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