Skip to Main Content
Phytophthora ramorum is a generalist plant pathogen with differences in virulence between isolates from infectious and dead-end hostsAuthor(s): D. Huberli; M. Garbelotto
Source: Forest Pathology. Early View, first published online March 25, 2011. 6 p
Publication Series: Scientific Journal (JRNL)
View PDF (660.12 KB)
DescriptionVariation in virulence was examined among isolates of Phytophthora ramorum from epidemiologically important or infectious (non-oak) and transmissive dead-end (oak) hosts from North America. Twelve isolates representative of the genetic, geographic and host range of P. ramorum in the western United States were inoculated on leaves of Umbellularia californica (bay laurel or bay) and stems of Quercus agrifolia (coast live oak). In spite of extreme genetic similarity among the isolates employed, and even within the same genotype, significant differences in lesion size were measured, suggesting virulence in this pathogen is also controlled by epigenetic factors. A strong positive correlation between lesion size on bay laurel and coast live oak provides experimental evidence P. ramorum is a generalist pathogen that lacks host specificity. Isolates from non-transmissive oaks were significantly less pathogenic both on oaks and bays than isolates from infectious hosts. These results are essential to further our understanding of the epidemiology and evolutionary potential of this pathogen. A quantitative differential in virulence of isolates from hosts with different epidemiological roles has been described for many animal diseases, but is a novel report for a plant disease.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
CitationHuberli, D.; Garbelotto, M. 2011. Phytophthora ramorum is a generalist plant pathogen with differences in virulence between isolates from infectious and dead-end hosts. Forest Pathology. Early View first published online: March 25, 2011. 6 p. doi:10.1111/j.1439-0329.2011.00715.x.
- Phytophthora ramorum is a generalist plant pathogen with differences in virulence between isolates from infectious and dead-end hosts
- California bay laurel susceptibility to Phythophthora ramorum depends upon season, leaf age, and fungal load
- Phenotypic diversification is associated with host-induced transposon derepression in the sudden oak death pathogen Phytophthora ramorum
XML: View XML