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  • Identifying candidate genes associated with cold adaptation in Douglas-fir using DNA microarrays

    Creator:
    Howe, Dana Kathryn
    Abstract:
    In forest trees from temperate and boreal regions, cold acclimation is an important adaptive trait that involves changes in gene expression and physiology. Genecological, quantitative genetic, and QTL studies have been used to study the genetics of cold acclimation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), but the genes responsible for...
    Resource Type:
    Masters Thesis
    Full Text:
    . William Proebsting, for their time and insight. I would also like to thank Dr. Hayes for the

  • Riparian litter inputs to streams in the central Oregon Coast Range

    Creator:
    Hart, Stephanie K.
    Abstract:
    Riparian zone vegetation can influence terrestrial and aquatic food webs through variations in the amounts, timing, and nutritional content of leaf and other litter inputs. Differences in vegetation composition and density, as well as riparian topography, may modulate the strength and quality of these inputs. Changes in inputs to small...
    Resource Type:
    Masters Thesis
    Full Text:
    . Deciduous site vertical litter inputs (504 g m-2 yr-1 (95% CI: 447-562)) were estimated to exceed those

  • Competitive effects of overtopping vegetation on Douglas-fir morphology in the Oregon Coast Range

    Creator:
    Chan, Samuel S.
    Abstract:
    The response of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) saplings to various levels of brush overtopping when growing on three north-facing sites in the Oregon Coast Range was investigated for two consecutive years. A fisheye (hemispherical) photographic technique combined with a digitizing computer system was used to determine the percentage of...
    Resource Type:
    Masters Thesis

  • Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

    Creator:
    Grossmann, Emilie B.
    Abstract:
    I conducted two separate studies, both related to the impacts of spring and fall prescribed fire on ponderosa pine (Pinus ponderosa Dougl. ex Loud.) forest soils in Eastern Oregon. The studies were either conducted at or linked to four stands of ponderosa pine, in the Malheur National Forest. Each stand...
    Resource Type:
    Masters Thesis
    Full Text:
    Schowalter, Dr. William Proebsting and Dr. David Myrold. I am also grateful to many other individuals who

  • RFLP analyses of interspecific hybrids of Phaseolus

    Creator:
    Kuo, Mei
    Abstract:
    Gene transfer via interspecific hybridization within Phaseolus has been limited by abnormal hybrid development and the rapid loss of hybridity in subsequent generations. The most advanced embryo development occurs in P. vulgaris x P. coccineus where mature seeds form. However, the reciprocal cross still results in abnormal embryos unable to...
    Resource Type:
    Dissertation
    Full Text:
    . My sincere appreciation is extended to Drs. William Denison, Steve Knapp, William Proebsting, Steve

  • A revision of the Macrocheles glaber species group (Acari: Macrochelidae) using phylogenetic systematics

    Creator:
    Walter, David Evans, 1950-
    Abstract:
    The Macrocheles glaber species group contains many of the common mites which are associated with the dung of domestic animals. Species in the glaber group have been investigated for their use as biological control agents of synanthropic flies. Over 10,000 slide-mounted specimens of Macrocheles in the OSU Acarology Collection and...
    Resource Type:
    Dissertation
    Full Text:
    William Proebsting for maintaining interest in the arcane field of acarine systematics, providing

  • Biological control of spider mites by the predatory mite Neoseiulus fallacis (Acari: Phytoseiidae) in ornamental nursery systems

    Creator:
    Pratt, Paul D.
    Abstract:
    We identified and evaluated a phytoseiid predator as a biological control agent of multiple spider mites pests that occur in ornamental nurseries. When comparing species, Neoseiulus fallacis (Garman) had a wider prey range than Galendromus occidentalis (Nesbitt), a higher probability of overwintering than Neoseiulus califomicus McGregor and was equally or...
    Resource Type:
    Dissertation
    Full Text:
    committee members, Jack DeAngelis, Jim Green, Marcos Kogan and William Proebsting were always generous

  • 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:
    , Drs. Everett Hansen, Jeffrey Stone, Gregory Filip, Joseph Spatafora, and William Proebsting. Their

  • Influence of photosynthesis and carbohydrates on adventitious root formation by leafy cuttings

    Creator:
    Davis, Tim D.
    Abstract:
    Many investigators have suggested that current photosynthate supply can limit adventitious root formation on leafy cuttings. Accordingly, studies were undertaken to determine the effects of altering photosynthesis and carbohydrate levels on adventitious root formation by leafy cuttings of a number of different species. Pea cuttings rooted at high CO₂ (1800...
    Resource Type:
    Dissertation
    Full Text:
    . William Proebsting for their advice and helpful suggestions. Technical assistance from the staff

  • Sugar uptake, fruit growth and carbon partitioning in the strawberry

    Creator:
    Forney, Charles F.
    Abstract:
    Sinks, plant organs which depend on the import of assimilates for growth, play a central role in determining assimilate distribution patterns within the plant. The strawberry fruit is a strong sink for dry matter and its effect on carbon partitioning and assimilation in the plant as well as the mechanism...
    Resource Type:
    Dissertation
    Full Text:
    . Potter, Dr. William Proebsting, Dr. Larry Boersma and Dr. Barbara Greene for their advice and helpful