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Filtering by: Creator Ganskopp, David C. (David Conrad) Remove constraint Creator: Ganskopp, David C. (David Conrad) Committee Member Arp, Daniel J. Remove constraint Committee Member: Arp, Daniel J.

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  • Evolution and ecology of the Ceanothus-Frankia symbiosis

    Creator:
    Jeong, Soon-Chun
    Abstract:
    The evolutionary relationship between Frankia and actinorhizal plants was evaluated by reconstructing molecular phylogenetic trees from nifH, 16S rDNA, and rbcL nucleotide sequences. Subgroupings in Frankia phylogenetic trees reconstructed from nifH and from 16S rDNA sequences were consistent in terms of plant origins of Frankia strains. Although the branching order...
    Resource Type:
    Dissertation
    Full Text:
    using plant bioassay methods with C. velutinus, C. sanguineus, and C. integerrimus as trap plants

  • Community composition and activities of denitrifying bacteria in soils

    Creator:
    Rich, Jeremy J.
    Abstract:
    Few studies have directly compared denitrifying community composition and activities in soils by coupling molecular-genetic techniques and traditional measures of denitnfication. I investigated communities of denitrifying bacteria from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the denitrification pathway, N₂O reductase (nosZ), served as...
    Resource Type:
    Dissertation
    Full Text:
    privacy ACKNOWLEDGEMENTS I acknowledge my major advisor David Myrold for his support, availability

  • The Oregon Coastal Subprovince, a new biogeographic subprovince for primary freshwater fishes in Oregon

    Creator:
    Kettratad, Jes
    Abstract:
    The Pacific Northwest has a relatively low diversity of primary freshwater fishes with most of the endemism and diversity in the Columbia River and Klamath River. However, the Oregon Coastal Subprovince defined as the coastal rivers from Miami River in the north to Sixes River in the south, has a...
    Resource Type:
    Dissertation
    Full Text:
    theories. In this study, I re-described C. tsiltcoosensis, C. macrocheilus, C. rimiculus, P. umpquae

  • Factors controlling halogenated and nonhalogenated alkene growth substrate range of vinyl chloride-utilizing bacteria

    Creator:
    Taylor, Anne Elizabeth
    Abstract:
    This thesis explores the factors limiting the alkene substrate range of the vinyl chloride (VC)-utilizing bacteria, and describes a method for measuring VC transformation in situ. Vinyl fluoride (VF) was evaluated as a surrogate for monitoring aerobic VC-transformation utilizing three isolates, Mycobacterium EE13a, Mycobacterium JS60 and Nocardioides JS614. JS614 grew...
    Resource Type:
    Dissertation
    Full Text:
    metabolism, (b) lack of induction of the full alkene metabolic pathway, (c) poor downstream enzyme