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    Author(s): Daniel K. ManterRick G. Kelsey; Joseph J. Karchesy
    Date: 2008
    Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 375-378
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (201 KB)

    Description

    Previously, we demonstrated that wood chips, essential oil, and four individual compounds from Alaska yellow-cedar (Chamaecyparis nootkatensis [D. Don] Spach) heartwood strongly inhibit the germination f Phytophthora ramorum (Werres, de Cock, Man int Veld) zoospores or sporangia, and reduce hyphal growth in culture (Manter and others 2006). Essential oils from heartwood of incense cedar (Calocedrus decurrens [Torr.] Florin), western red cedar (Thuja plicata Donn ex D. Don), Port-Orford-cedar (Chamaecyparis lawsoniana [A. Murr.] Parl.), and western juniper (Juniperus occidentalis Hook.) were also tested and found to be equally active, but not investigated further until now. The objectives of this study were to: 1) test the procedure described by Kuhajek and others (2003) as a bioassay technique for P. ramorum; 2) use this bioassay with other individual compounds from yellow-cedar heartwood that were not previously tested for bioactivity toward P. ramorum; and 3) bioassay extracts and compounds from the heartwood of the other conifers with antimicrobial essential oils and compare their P. ramorum activity to the yellow-cedar constituents.

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    Citation

    Manter, Daniel K.; Kelsey, Rick G.; Karchesy, Joseph J. 2008. Antimicrobial activity of extracts and select compounds in the heartwood of seven western conifers toward Phytophthora ramorum. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 375-378

    Keywords

    Photometric bioassay, conifer heartwood, antimicrobial activity

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https://www.fs.usda.gov/treesearch/pubs/29958