Index Catalog // ScholarsArchive@OSU

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Creator:: Dunnell, Kelsey Liann
Abstract:: Host-parasite interactions between the pathogen, Sphaerulina musiva, and its host, Populus spp., were examined in a series of studies. In the first study, variation in resistance of Populus nigra from 7 locations in Europe was differentiated based on the parameters cankers per cm and disease severity score. The analysis evaluated...
Resource Type:: Dissertation
Full Text:: resistance will impact leaf spot severity and better guide disease resistance breeding programs. The

Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam.

Creator:: Brodhagen, Marion L.
Abstract:: Spotted knapweed, Centaurea maculosa Lam. (Compositae) is an extremely successful introduced weed species in the northwestern United States. Multiple factors may be responsible for its success, including chemical defense. Two different types of putative chemical defense agents are the focus of this thesis. The first is a bitter-tasting sesquiterpene lactone,...
Resource Type:: Masters Thesis
Full Text:: discourage loss of carbohydrate to herbivory or disease. 1.1.2. Economic and environmental impact C

Bionomics of the clover cyst nematode, Heterodera trifolii (Goffart, 1932) Oostenbrink, 1939 (Nematoda: Heteroderidae)

Creator:: Sen, Arun Kumar
Resource Type:: Masters Thesis
Full Text:: the first plant parasitic nematode and described the first plant disease caused by a nematode

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Creator:: Geddens, Ray M.
Abstract:: Eight postemergence herbicides were evaluated to determine their influence on the incidence and severity of take-all disease caused by the fungus Gaeumannomyces graminis var. tritici in winter wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid), difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine (amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl (methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
Resource Type:: Dissertation
Full Text:: Postemergence herbicides and take-all disease in winter

Evaluation of assay systems for the determination of susceptibility of the hop (Humulus lupulus) to Verticillium wilt caused by Verticillium dahliae

Creator:: Shufelt, Eileen Marie
Abstract:: A rapid and reliable assay is needed to evaluate hop resistance to Verticillium wilt caused by Verticillium dahliae. Assays used in the past are laborious, require long incubation periods, and usually produce mild symptoms which are difficult to evaluate and are often not consistent. A study comparing several methods for...
Resource Type:: Masters Thesis
Full Text:: to distinguish the relative susceptibility and resistance of hop cultivars to V. dahliae. This

Sensitivity of wheat genotypes to a toxic fraction produced by Cephalosporium gramineum and correlation with disease susceptibility

Creator:: Rahman, Mahfuzur
Abstract:: Cephalosporium stripe, caused by the soil-borne ascomycete Cephalosporium gramineum, is becoming an increasingly important disease of winter wheat (Triticum aestivum) in several areas of the world, especially where stubble mulch is practiced to maintain soil moisture and prevent erosion. As cultural control of the disease is infeasible and no fungicides...
Resource Type:: Masters Thesis
Full Text:: of correlation between overall resistance to stripe disease and hospitality to sporulation

Biological and molecular characterization of wild type parental and nonpathogenic mutant strains of Pseudomonas syringae pathovars phaseolicola and syringae

Creator:: Bertoni, Gregory
Abstract:: The in planta growth of three wild type strains of phytopathogenic bacteria and three nonpathogenic mutant strains was studied to determine if mutations eliminating the ability of the mutant strains to cause disease had affected their growth in leaf tissue. The mutant strains were obtained by Tn5 mutagenesis of Pseudomonas...
Resource Type:: Masters Thesis
Full Text:: uracil and had caused an inability to produce typical necrotic and chlorotic disease symptoms in bean

Interactions between pea seed-borne mosaic virus pathotype 1 and Pisum sativum resistance gene sbm-1

Creator:: Keller, Karen E.
Abstract:: Pea seed-borne mosaic potyvirus pathotype 1 (PSbMV-P1) has the ability to infect most genotypes of Pisum sativum. The exception are those genotypes that are homozygous recessive for the sbm-1 gene. The life cycle of PSbMV pathotype 4 (PSbMV-P4) is unaffected by the sbm-1/sbm-1 genotype. Infectious clones of Pl-P4 recombinants were...
Resource Type:: Masters Thesis
Full Text:: and Pisum sativum resistance gene sbm-1 AN ABSTRACT OF THE THESIS OF Karen E. Keller for the

Cephalosporium stripe of wheat : seedling-based resistance screening and pathogenic variability

Creator:: Cowger, Christina
Abstract:: Cephalosporium stripe of wheat (Triticum aestivum), caused by the soilborne fungus Cephalosporium gramineum, results in significant yield reductions in dryland winter wheat crops of the U.S. Pacific Northwest. The development of resistant cultivars offers the best hope for disease control. Breeding for resistance is hampered by the long trial times...
Resource Type:: Masters Thesis
Full Text:: Stripe of Wheat: Seedling-Based Resistance Screening and Pathogenic Variability Abstract approved

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:: Doctor of Philosophy in Botany and Plant Pathology presented on November 30, 2004. Title: Resistance

ScholarsArchive@OSU

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam.

Bionomics of the clover cyst nematode, Heterodera trifolii (Goffart, 1932) Oostenbrink, 1939 (Nematoda: Heteroderidae)

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Evaluation of assay systems for the determination of susceptibility of the hop (Humulus lupulus) to Verticillium wilt caused by Verticillium dahliae

Sensitivity of wheat genotypes to a toxic fraction produced by Cephalosporium gramineum and correlation with disease susceptibility

Biological and molecular characterization of wild type parental and nonpathogenic mutant strains of Pseudomonas syringae pathovars phaseolicola and syringae

Interactions between pea seed-borne mosaic virus pathotype 1 and Pisum sativum resistance gene sbm-1

Cephalosporium stripe of wheat : seedling-based resistance screening and pathogenic variability

Resistance mechanisms of Port-Orford-cedar to Phytophthora lateralis

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