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Abstract
Phytophthora ramorum populations are clonal and consist of three clonal lineages: EU1 is the only lineage found in Europe with a few isolated nursery infections in the USA; NA1 is associated with natural infestations in California and Oregon as well as some nursery infections in North America, and NA2 has a limited distribution and has only been isolated from a few nurseries in the USA. Recent studies have shown that the clonal lineages may have varying degrees of aggressiveness on some host species, such as
Quercus rubra. In this study, we examined virulence, sporulation, and elicitin production of five
P. ramorum isolates from each of the three clonal lineages. Virulence (lesion size) and sporulation (sporangia production) were determined on inoculated detached leaves of rhododendron ‘Nova Zembla’. Elicitin production was determined
in vitro.
Parent Publication
Citation
Manter, Daniel; Hansen, Everett; Parke, Jennifer. 2010.Virulence, Sporulation, and Elicitin Production in Three Clonal Lineages of
Phytophthora ramorum. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M. 2010. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 88
