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Chemistry of coast live oak response to Phytophthora ramorum infectionAuthor(s): Frances S. Ockels; Alieta Eyles; Brice A. McPherson; David L. Wood; Pierluigi Bonello
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. 157-161
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: View PDF (237 KB)
DescriptionSince the mid 1990s, Phytophthora ramorum has been responsible for the widespread mortality of tanoaks, as well as several oak species throughout California and Oregon forests. However, not all trees die, even in areas with high disease pressure, suggesting that some trees may be resistant to the pathogen. The apparent resistance to P. ramorum infection of some individuals within coast live oak populations has been observed in artificial inoculation studies. For example, from artificial branch-cutting inoculation trials, Dodd and others (2005) found significant variation (up to eightfold difference in lesion sizes) in susceptibility to P. ramorum. In addition, apparent resistance has also been observed in naturally infected forests, where a number of coast live oaks have survived for more than seven years despite being infected (McPherson and others 2005 and unpublished data).
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CitationOckels, Frances S.; Eyles, Alieta; McPherson, Brice A.; Wood, David L.; Bonello, Pierluigi. 2008. Chemistry of coast live oak response to Phytophthora ramorum infection. 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. 157-161
KeywordsPhytophthora ramorum, sudden oak death, defense, resistance, phenolics
- Potential effects of sudden oak death on small mammals and herpetofauna in coast live oak (Quercus agrifolia woodlands
- Forecasting the future of coast live oak forests in the face of sudden oak death
- Disease risk factors and disease progress in coast live oak and tanoak affected by Phytophthora ramorum canker (sudden oak death)
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