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Variation in pathogenicity of a mountain pine beetle-associated blue-stain fungus, Grosmannia clavigera, on young lodgepole pine in British Columbia

Authors
Plattner, AlexKim, Jae-JinDiGuistini, ScottBreuil, Colette
Issue Date
Jul-2008
Publisher
TAYLOR & FRANCIS INC
Keywords
Grosmannia clavigera; Ophiostoma clavigerum; mountain pine beetle; blue-stain fungus; intraspecific variation; pathogenicity
Citation
CANADIAN JOURNAL OF PLANT PATHOLOGY, v.30, no.3, pp 457 - 466
Pages
10
Indexed
SCIE
SCOPUS
Journal Title
CANADIAN JOURNAL OF PLANT PATHOLOGY
Volume
30
Number
3
Start Page
457
End Page
466
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/123313
DOI
10.1080/07060660809507543
ISSN
0706-0661
1715-2992
Abstract
Grosmannia clavigera is the most pathogenic blue-staining fungal associate of the Mountain pine beetle (Dendroctonus ponderosae). In contrast to its importance as a primary invader of lodgepole pine (Pinus contorta) sapwood, intraspecific variability in pathogenicity of G. clavigera on lodgepole pine, the predominant host of mountain pine beetles in British Columbia, has not been investigated in detail. The present work reports on pathogenicity indicators induced by five G. clavigera isolates inoculated into lodgepole pines and growth characteristics of the C into Young lodgepole pine trees. Phloem isolates oil artificial media. Fungi were inoculated Lit 200 inoculations/m(2) lesion length, sapwood occlusion area, and sapwood Moisture content were measured after 7 or 48 weeks. Three isolates produced long lesions, Occluded larger areas, and reduced more the moisture content after 48 weeks compared with the remaining two isolates. Isolate ATCC 18086 induced the strongest pathogenic symptoms after 7 weeks and grew the fastest Lip to 22.5 degrees C but grew the slowest at 27.5 degrees C. In a low-oxygen environment, most isolates grew faster than under ambient conditions. Significant intraspecific variation was observed among G. clavigera isolates for all parameters tested.
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