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Serological and biological characterization of seed-borne isolates of blackeye cowpea mosaic and cowpea aphid-borne mosaic potyviruses in Vigna unguiculata (L.) Walp

Creator:: Bashir, Muhammad
Resource Type:: Dissertation
Full Text:: . G. Dougherty, Dr. G. W. Krantz, and Dr. C. C. Mundt, who served on my committee, and for their

Permineralized Mesozoic Moss Gametophytes and their Implications for Bryophyte Evolution

Creator:: Bippus, Alexander C.
Abstract:: Mosses (Phylum Bryophyta) are widely considered to be among the most ancient groups of land plants (embryophytes) and they are the second most speciose embryophyte phylum with ~13,000 extant species. Despite their diversity and antiquity, mosses have a limited fossil record, which primarily consists of gametophytes entombed in Cenozoic amber....
Resource Type:: Dissertation
Full Text:: Alexander C. Bippus for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

Systematic, genomic, and transcriptomic analysis of mycoparasitic Tolypocladium species and their Elaphomyces hosts

Creator:: Quandt, C. Alisha
Abstract:: Fungi in the genus Tolypocladium are diverse in their host associations, but the predominant ecologies include parasites of the ectomycorrhizal genus Elaphomyces and pathogens of insects. The aim of this dissertation research is to examine the evolution of these fungi and their host associations. To accomplish this several lines of...
Resource Type:: Dissertation
Full Text:: Mycoparasitic Tolypocladium Species and their Elaphomyces Hosts AN ABSTRACT OF THE DISSERTATION OF C

Genomic Investigations of Diversity within the Milkweed Genus Asclepias, at Multiple Scales

Creator:: Weitemier, Kevin A.
Abstract:: At a time when the biodiversity on Earth is being rapidly lost, new technologies and methods in genomic analysis are fortunately allowing scientists to catalog and explore the diversity that remains more efficiently and precisely. The studies in this dissertation investigate genomic diversity within the milkweed genus, Asclepias, at multiple...
Resource Type:: Dissertation
Full Text:: here, and it is found to contain all expected forms of phytochromes: A, B, C, and E. A subsequent

Epidemiology of disease caused by Pseudomonas syringae as an epiphyte and its frequency, distribution, and characteristics as an endophyte of pear

Creator:: Whitesides, Steven K.
Abstract:: Conditions were established for inducing pear blossom blast caused by Pseudomonas syringae (Ps) on both attached and detached shoots. The incidence of disease was proportional to the log of Ps population under optimal temperature, moisture and bloom developmental stage. Highest incidence of infection followed occurrence of a major exotherm in...
Resource Type:: Dissertation
Full Text:: temperatures ranging from -1.8 to -3.5 C. Wetness duration following exotherm occurrence was less important

Purification and properties of a ferredoxin from Rhizobium japonicum bacteroids

Creator:: Carter, Kevin Richard
Resource Type:: Dissertation
Full Text:: 1900 nmol C 2 H 4 produced.min -1 -mg 1 in the reaction mediating electron transfer between

Sweet corn decline syndrome in Oregon's Willamette Valley

Creator:: Hoinacki, Elisabeth V.
Abstract:: For the past several years vegetable growers in Oregon's Willamette Valley have experienced reduced yields in their sweet corn plantings. We conducted studies to 1) describe the symptomology and etiology of the disease, 2) test a root rot rating system we developed to evaluate factors in the disease syndrome, and...
Resource Type:: Dissertation
Full Text:: ............................. 98 Appendix C: Cultivar trial................................... 103 LIST OF FIGURES Figure Page

Taxonomy and host specificity of the genus Agrobacterium

Creator:: Anderson, Arthur Robert
Abstract:: One hundred seventy-eight Agrobacterium isolates, 120 United States (U.S.), 26 Australian and 32 of miscellaneous origin, were characterized for their reactions to 20 biochemical and physiological tests. Isolate pathogenicity and degree of host specificity, utilization of nopaline and octopine, and sensitivity to agrocin-84 also were determined. The U.S. isolates were...
Resource Type:: Dissertation
Full Text:: host. 3 Bibliography 1. Elliott, C. 1951. Agrobacterium tumefaciens, p. 6. In Manual of Bacterial

Cytokinin production by Agrobacterium tumefaciens

Creator:: Kaiss-Chapman, Richard Wilkinson
Abstract:: Certain plant-associated prokaryotes such as Corynebacteriurn fascians and Agrobacterium tumefaciens are known to produce substantial levels of cytokinins. In view of the fragmentary and presumptive evidence available on the quantitative and qualitative levels of cytokinins produced by A. tumefaciens, it was decided to conduct a study of the cytokinins produced...
Resource Type:: Dissertation
Full Text:: Development of HPLC and GLC Separations of C ytokinins Unequivocal Identification of Cytokinins from

Relationship of extra-matrical hyphae of vesicular-arbuscular mycorrhizal fungi to plant growth response

Creator:: Kough, John Lawrence
Abstract:: The colonization of several species of plants by vesicularar-buscular mycorrhizae (VAM) was studied to determine how host, soil, or symbiont factors interacted to enhance growth of the host plant. Seedlings of two species of the Cuppressaceae and two of the Taxodiaceae formed VAM; colonization significantly improved growth. This response to...
Resource Type:: Dissertation
Full Text:: Photomicrographs of fluorescein-labeled VAM fungi viewed 93 with u.v. illumination except (c), (e) and (g) which

ScholarsArchive@OSU

Serological and biological characterization of seed-borne isolates of blackeye cowpea mosaic and cowpea aphid-borne mosaic potyviruses in Vigna unguiculata (L.) Walp

Permineralized Mesozoic Moss Gametophytes and their Implications for Bryophyte Evolution

Systematic, genomic, and transcriptomic analysis of mycoparasitic Tolypocladium species and their Elaphomyces hosts

Genomic Investigations of Diversity within the Milkweed Genus Asclepias, at Multiple Scales

Epidemiology of disease caused by Pseudomonas syringae as an epiphyte and its frequency, distribution, and characteristics as an endophyte of pear

Purification and properties of a ferredoxin from Rhizobium japonicum bacteroids

Sweet corn decline syndrome in Oregon's Willamette Valley

Taxonomy and host specificity of the genus Agrobacterium

Cytokinin production by Agrobacterium tumefaciens

Relationship of extra-matrical hyphae of vesicular-arbuscular mycorrhizal fungi to plant growth response

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