Canadian Forest Service Publications

Phenotypic Variation in Phytophthora ramorum: Wild Type vs Non-Wild Type Isolates. 2010. Elliott, M.; Sumampong, G.; Shamoun, S.F.; Becker, E.M.; Varga, A.; James, D.; Masri, S.; Grünwald, N.J. Pages 317-318 in S.J. Frankel, J.T. Kliejunas, and K.M. Palmieri, technical coordinators. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229, June 15-18, 2009, Santa Cruz, California. Department of Agriculture, Forest Service, Pacific Southwest Research Station, Albany, CA, U.S.

Year: 2010

Available from: Pacific Forestry Centre

Catalog ID: 31702

Language: English

CFS Availability: PDF (download)

Abstract

Phenotypic characteristics of four Phytophthora ramorum isolates with atypical culture morphology (non-wild type; nwt) were compared with four "wild type" (wt) isolates using material from stock cultures and after re-isolation from lesions on inoculated rhododendron leaves. Our preliminary results show that nwt isolates were more variable than wt isolates in all of the characters tested, and were generally lower in aggressiveness, chlamydospore production, and growth rate at all temperatures for both the original culture and when reisolated from a host.