Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.0 MB byte)

Title: Host-induced genome alterations in Phytophthora ramorum, I. NA1 lineage on coast live oak in California, II. EU1 lineage on Chamaecyparis lawsoniana in UK

Author: Kasuga, Takao; Bui, Mai; Bernhardt, Elizabeth; Swiecki, Tedmund; Aram, Kamyar; Bertier, Lien; Yuzon, Jennifer; Cano, Liliana M.; Webber, Joan; Brasier, Clive; Press, Caroline; Grünwald, Niklaus; Rizzo, David; Garbelotto, Matteo;

Date: 2017

Source: Proceedings of the sudden oak death sixth science symposium. Gen. Tech. Rep. GTR-PSW-255. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 37-39.

Publication Series: Scientific Journal (JRNL)

   Note: This article is part of a larger document. View the larger document

Description: Rapid phenotypic diversification in clonal invasive populations is often observed, although the underlying genetic mechanisms remain elusive. Lineages of the sudden oak death pathogen Phytophthora ramorum are exclusively clonal, yet isolates of the NA1 lineage from oak (Quercus spp.) frequently exhibit hostdependent, unstable colony phenotypes called non-wild type (nwt, fig. 1) (Brasier and others 2006).

This phenotypic variation is seen despite the fact that population genetic and host-specificity studies negate any host-driven population subdivision. We also found comparable nwt phenotypes in EU1 isolates from Lawson cypress (Chamaecyparis lawsoniana) in the UK (fig. 2): isolates from the middle of a large ~4m long lesion on a mature tree were normal wild type (wt), while those from the extremities were variable nwt types. Previously only wt isolates were known in the EU1 lineage, including those from larch (Larix). Based on a large survey of genotypes from different hosts, we hypothesize that the environment in the bark of oak and Lawson cypress is responsible for the unusual phenotypic diversification in P. ramorum.

Publication Notes:

  • 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.

XML: View XML

Citation:


Kasuga, Takao; Bui, Mai; Bernhardt, Elizabeth; Swiecki, Tedmund; Aram, Kamyar; Bertier, Lien; Yuzon, Jennifer; Cano, Liliana M.; Webber, Joan; Brasier, Clive; Press, Caroline; Grünwald, Niklaus; Rizzo, David; Garbelotto, Matteo 2017. Host-induced genome alterations in Phytophthora ramorum, I. NA1 lineage on coast live oak in California, II. EU1 lineage on Chamaecyparis lawsoniana in UK. In: Frankel, Susan J.; Harrell, Katharine M., tech. coords. Proceedings of the sudden oak death sixth science symposium. Gen. Tech. Rep. GTR-PSW-255. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 37-39.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.