Index Catalog // ScholarsArchive@OSU

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:: Fusarium Infection of Douglas-Fir Roots AN ABSTRACT OF THE THESIS OF James Herbert Graham, Jr. for the

Factors affecting germination of endomycorrhizal spores

Creator:: Daniels, Barbara Ann
Abstract:: Four isolates of Glomus mosseae, collected from diverse geographic locations, were pot cultured on varied host plants or stored in the same soil as collected. Spores of three isolates failed to germinate on any of five agar media while the fourth germinated well on all media. Lack of germination on...
Resource Type:: Dissertation
Full Text:: specially thank my advisor, Dr. James M. Trappe for his patience and guidance throughout my Ph. D. program

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
Full Text:: ) Abstract approved: Redacted for Privacy Dr. Lewis F. Roth for Dr. Everett M. Hansen Verticicladiella

Factors affecting the inoculum potential of VA and ectomycorrhizal fungi in forest soils of southwest Oregon and northern California

Creator:: Parke, Jennifer Lee
Resource Type:: Dissertation
Full Text:: . tiMg M. Trappe Seedling bioassays were conducted in the greenhouse to determine if the inoculum

Port-Orford-cedar and Phytophthora lateralis : grafting and heritability of resistance in the host, and variation in the pathogen

Creator:: McWilliams, Michael G.
Abstract:: Port-Orford-cedar (Chamaecyparis lawsoniana) is a forest tree native to a small area of Oregon and California. A root disease caused by Phytophthora lateralis causes widespread mortality of Port-Orford-cedar. This dissertation examines three important elements of the Port-Orford-cedar P. lateralis pathosystem related to breeding for disease resistance: use of resistant rootstocks...
Resource Type:: Dissertation
Full Text:: Resistance in the Host. and Variation in the Pathogen. Abstract approved: Everett M. Hansen Port-Orford

The epidemiology of sudden oak death in Oregon forests

Creator:: Peterson, Ebba K.
Abstract:: The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in't Veld), causal agent of Sudden Oak Death (SOD) of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus syn. Lithocarpus densiflorus), is established in coastal forests of the western United States. Since the discovery of SOD in the Douglas-fir / tanoak forests of...
Resource Type:: Dissertation
Full Text:: : Everett M. Hansen The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in’t Veld), causal

Resistance mechanisms of Port-Orford-cedar to Phytophthora lateralis

Creator:: Oh, Eunsung
Abstract:: Breeding Port-Orford-cedar for resistance to Phytophthora lateralis, a causal agent of root disease, begins by screening, through artificial inoculation, phenotypically resistant trees selected from natural stands. The successful program selected tolerant or resistant POC parent trees for the purpose of disease management. Candidate resistant POCs were used in my dissertation...
Resource Type:: Dissertation
Full Text:: Mechanisms of Port-Orford-Cedar to Phytonhthora lateralis. Abstract approved: M. Hansen Breeding Port

Insights into the pathology and epidemiology of Phytophthora ramorum, causal agent of sudden oak death

Creator:: Daniels, Hazel A.
Abstract:: Sudden oak death is caused by the clonally reproducing generalist oomycete Phytophthora ramorum. The pathogen can infect more than 130 different plant hosts including Quercus spp., Larix kaempferi, and Notholithocarpus densiflorus, as well as common nursery genera such as Rhododendron and Camelia, where it causes symptoms ranging from bleeding cankers...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Jared M. LeBoldus Sudden oak death is caused by the clonally reproducing generalist

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Creator:: Lenz, Ryan R.
Abstract:: Managers of forest and plantation ecosystems are encountering growing problems involving plant pathogens and the expanding geographic ranges of these pathogens. Historically unexposed stands are exceptionally vulnerable when a non-native pathogen is introduced because these pathogens can cause devastating disease in a host population that lacks co-evolved resistance mechanisms. One...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________ Jared M. LeBoldus Managers of forest and plantation ecosystems are encountering growing

Acyl-ACP thioesterases and beta-ketoacyl-ACP synthase regulate fatty acid chain length in seed oils of Cuphea wrightii

Creator:: Leonard, Jeffrey M.
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Jeffrey M. Leonard for the degree

ScholarsArchive@OSU

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

Factors affecting germination of endomycorrhizal spores

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

Factors affecting the inoculum potential of VA and ectomycorrhizal fungi in forest soils of southwest Oregon and northern California

Port-Orford-cedar and Phytophthora lateralis : grafting and heritability of resistance in the host, and variation in the pathogen

The epidemiology of sudden oak death in Oregon forests

Resistance mechanisms of Port-Orford-cedar to Phytophthora lateralis

Insights into the pathology and epidemiology of Phytophthora ramorum, causal agent of sudden oak death

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Acyl-ACP thioesterases and beta-ketoacyl-ACP synthase regulate fatty acid chain length in seed oils of Cuphea wrightii

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