Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Karel A. Jacobs; James D. MacDonald; Alison M. Berry; Laurence R. Costello
    Date: 1997
    Source: In: Pillsbury, Norman H.; Verner, Jared; Tietje, William D., technical coordinators. 1997. Proceedings of a symposium on oak woodlands: ecology, management, and urban interface issues; 19–22 March 1996; San Luis Obispo, CA. Gen. Tech. Rep. PSW-GTR-160. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; p. 553-558
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (1.4 MB)

    Description

    The incidence and severity of Phytophthora cinnamomi Rands root disease was quantified in cork oak (Quercus suber L.) roots subjected to low oxygen (hypoxia) stress. Seedling root tips were inoculated with mycelial plugs of the fungus and incubated in ≤1, 3-4, or 21 percent oxygen for 5 days. Ninety-four percent of roots became necrotic in the ≤1 percent oxygen treatment, compared to 60 and 46 percent in the 3-4 and 21 percent oxygen treatments, respectively. Root colonization and necrosis did not differ significantly between treatments. Fifty percent of inoculated roots remained asymptomatic in the atmospheric oxygen treatment, compared to 6 percent of roots in the near anoxic treatment. The asymptomatic roots were characterized by continued tip extension growth and lateral root formation above the inoculation point. Hypoxia increased the likelihood that roots became diseased, but not the severity of symptoms.

    Publication Notes

    • You may send email to psw_communications@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Jacobs, Karel A.; MacDonald, James D.; Berry, Alison M.; Costello, Laurence R. 1997. The Effect of Low Oxygen Stress on Phytophthora cinnamomi Infection and Disease of Cork Oak Roots. In: Pillsbury, Norman H.; Verner, Jared; Tietje, William D., technical coordinators. 1997. Proceedings of a symposium on oak woodlands: ecology, management, and urban interface issues; 19–22 March 1996; San Luis Obispo, CA. Gen. Tech. Rep. PSW-GTR-160. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; p. 553-558

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/28218