Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 2. Development of a feeder strip assay
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Abstract
Western red cedar (Thuja plicata Donn) is a naturally durable softwood species native to British Columbia in Canada, and Washington, Oregon and California in the USA. Untreated T. plicata products are usually durable because of the presence of extractives with anti-microbial activity. However, there are extractive tolerant fungi that can attack T. plicata. To screen for extractive-tolerant species we developed a T. plicata feeder strip assay. When the feeder strips were placed on malt extract agar, extractives from the wood accumulated in the media and strongly inhibited growth of non-tolerant fungal strains. Extractives remaining in feeder strips following incubation on media were characterized. Of the many compounds leached out, γ- and β-thujaplicin, β-thujaplicinol, plicatic acid and thujic acid were quantified. The growth of selected fungal strains was not affected by plicatic acid; however, it was inhibited to different degrees by β- and γ-thujaplicin. Pachnocybe ferruginea was extractive-tolerant and may play an important role in the initial stages of degradation of T. plicata products.
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©2007 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Characterization of thin water layers in pulp by tritium exchange. Part 1: Methods development
- Characterization of thin water layers in pulp by tritium exchange. Part 2: Effect of refining on water absorption
- Characterizing wood fiber and particle length with a mixture distribution and a segmented distribution
- Effect of photolysis on 17th/18th century paper
- Changes in the cell wall volume of a number of wood species due to reaction with acetic anhydride
- A novel simple route to wood acetylation by transesterification with vinyl acetate
- Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay
- Ellagitannins from Portuguese oak wood (Quercus pyrenaica Willd.) used in cooperage: influence of geographical origin, coarseness of the grain and toasting level
- Epimeric phenylpropanoid glycosides from inner bark of Paulownia coreana Uyeki
- Lipid and lignin composition of woods from different eucalypt species
- A hysteresis model suitable for numerical simulation of moisture content in wood
- Simple estimation of critical stress intensity factors of wood by tests with double cantilever beam and three-point end-notched flexure
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 1. Mild extraction by ultrasonication and quantification of extractives by reverse-phase HPLC
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 2. Development of a feeder strip assay
- Contribution of hardness to the natural resistance of a range of wood species to attack by the marine borer Limnoria
- Biodeterioration of treated Pinus radiata timber by Australian decay fungi and the termite Coptotermes acinaciformis in laboratory bioassays and field conditions
- Development of an accelerated soil-contact decay test
- Obituary Dr. Bo Hortling (1942–2006)