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Filtering by: Creator Thompson, Gene Thomas Academic Affiliation Botany and Plant Pathology Subject Douglas fir -- Diseases and pests

Phylogenetics, population genetics, molecular epidemiology, and pathogenicity of the Douglas-fir Swiss needle cast pathogen Phaeocryptopus gaeumannii

Creator:

Winton, Loretta M.

Abstract:

A hierarchical series of studies, based mainly on molecular data, was conducted to elucidate the life history of the Douglas-fir Swiss needle cast pathogen Phaeocryptopus gaeumannii at macro- and micro-evolutionary scales. This information was then utilized to design and evaluate molecular diagnostic tools for use in studies on the epidemiology...

Resource Type:

Dissertation

Full Text:

ribosomal gene sequences indicated that P. gaeumannii, currently classified in the Venturiaceae, is closely
The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Creator:

Graham, James Herbert

Abstract:

The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma crustuliniforme and Laccaria laccata produced ethylene in vitro in modified Melin-Norkrans liquid medium only if amended with 2.5 to 10 mM methionine; Pisolithus tinctorius failed to produce ethylene unless the cultures were renewed with fresh methionine-amended medium prior to ethylene assay. An additional 19...

Resource Type:

Dissertation

Full Text:

light (Yang et al. 1967). Thomas and Spencer (1978) investigated ethylene production by the yeast
Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

Creator:

Hessburg, Paul F.

Abstract:

Verticicladiella wageneri Kendr. is a vascular wilt pathogen of Douglas-fir in the Pacific Northwest, The disease is characterized by black staining of colonized sapwood; crown symptoms are those typical of a wilting syndrome. Histopathological studies revealed that the pathogen is limited to the xylem but causes vascular dysfunction in both...

Resource Type:

Dissertation

ScholarsArchive@OSU

Phylogenetics, population genetics, molecular epidemiology, and pathogenicity of the Douglas-fir Swiss needle cast pathogen Phaeocryptopus gaeumannii

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

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