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Filtering by: Creator Wilson, T. R. C. (Thomas Randall Carson), 1884- Remove constraint Creator: Wilson, T. R. C. (Thomas Randall Carson), 1884- Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • Fescue taxonomy in the Pacific coast states

    Creator:
    Wilson, Barbara L.
    Abstract:
    Accurate taxonomy is essential to preservation and management of native grasses. Four problems in fescue taxonomy were investigated: the identity of the native fescue that dominates western Oregon and Washington prairies, the relationship of native Festuca roemeri to closely related grasses, the status of F. howellii and F. washingtonica, and...
    Resource Type:
    Dissertation
    Full Text:
    Fescue of Western Oregon Prairies Barbara L. Wilson Published as pages 153-161 in: Kaye, T. N., A

  • The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

    Creator:
    Davis, Kimberly J.
    Abstract:
    Many studies suggest that weedy plant species are most successful when soil nitrogen in abundant. Consequently, I used soil nitrogen manipulations to determine if altering nitrogen would affect the establishment of both weedy and native plant species in a western Oregon wetland prairie. In two studies, we added carbon amendments...
    Resource Type:
    Dissertation
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    : Mark V. Wilson Many studies suggest that weedy plant species are most successful when soil nitrogen

  • Development and Application of Tools for Genetic Analysis of Clonal Populations

    Creator:
    Kamvar, Zhian N.
    Abstract:
    Research on the population genetics of microbial organisms requires the use of specialized analyses designed for clonal organisms to avoid violating the assumptions of traditional population genetic models. The tools necessary for performing these analyses existed as a set of unrelated software with non-overlapping capabilities and did not cover all...
    Resource Type:
    Dissertation
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    , written in the R statistical language, available on all computing platforms. This package is designed for

  • Effects of single and multiple stressors on communities of wheat and wild oats

    Creator:
    Pfleeger, Thomas G.
    Abstract:
    Most plant toxicology tests developed in support of environmental laws use a single stress applied to an individual plant. While tests using individual species or stresses require fewer resources and are easier to interpret, they are under increasing criticism for being unrealistic and missing important ecological interactions. The objective of...
    Resource Type:
    Dissertation
    Full Text:
    wheat and wild oats AN ABSTRACT OF THE THESIS OF Thomas G. Pfleeger for the degree of Doctor of

  • Community Ecology and Population Genomics of Rhizopogon in the Madrean Sky Island Archipelago

    Creator:
    Piña Páez, Carolina G.
    Abstract:
    Anthropogenic induced climate change is predicted to alter distribution of existing plant populations. As plants migrate over space and time, populations often fragment and contract, affecting basic elements of population dynamics (e.g., population size, gene flow, genetic diversity, etc.). Little is known, however, how these impacts on plant species will...
    Resource Type:
    Dissertation
    Full Text:
    of my students: Adam R. Carson, Jessica A. Martin, and Skyler M. Har. Thank you for taking care of

  • 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:
    ................................................................................................................................... 307 Supplemental Figure C.5. Calibration curves for the primer pairs eIF4a F & R and

  • Taxonomy of Phacelia section Miltitzia (hydrophyllaceae)

    Creator:
    Halse, Richard R.
    Abstract:
    A systematic study was made of the species comprising Phacelia section Miltitzia. These species, which are commonly found in the Great Basin physiographic province of western North America, are distinguished from other members of Phacelia by their yellow, marcescent corollas and their transversely corrugated seeds. This project utilized morphological, cytological,...
    Resource Type:
    Dissertation
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    4v:A ner N r r WO 3 .1 t . ;:_, a. .", ''IM,,, * .M.',.. ... /.....:"."-A-_, 1 'Q q4 t

  • Phylogenetics and genomic patterns of speciation in Pinus with an empahsis on subgenus Strobus

    Creator:
    Syring, John V.
    Abstract:
    Data from nuclear ribosomal internal transcribed spacer regions (nrITS) and chloroplast DNA (cpDNA) have failed to resolve phylogenetic relationships in Pinus. To provide greater interspecific resolution, five low-copy nuclear genes were developed from mapped conifer anchor loci. Four genes were sequenced from species representing all Pinus subsections. Individual loci do...
    Resource Type:
    Dissertation
    Full Text:
    : 14406-14411. Cronn, R. C., R. L. Small, T. Haselkorn, and J. F. Wendel. 2002. Rapid diversification of

  • Phylogeography and Evolution of Effector Genes in Phytophthora Species

    Creator:
    Shakya, Shankar K.
    Abstract:
    Plant pathogens in the genus Phytophthora are known to cause disease on field crops, nursery plants, and forest trees. The best known example probably is Phytophthora infestans, which triggered the infamous Irish potato famine. Other important Phytophthora species include: P. ramorum (sudden oak death pathogen), P. sojae (soybean root rot...
    Resource Type:
    Dissertation
    Full Text:
    , Thomas Jung and Niklaus Grünwald conceived the study. Jerry Weiland, Marillia Horta Jung, Cristiana

  • Symbiosis in the Pacific Ring of Fire : evolutionary-biology of Rhizopogon subgenus Villosuli as mutualists of Pseudotsuga

    Creator:
    Mujic, Alija Bajro
    Abstract:
    Rhizopogon is a large genus of ectomycorrhizal (EM) fungi that grows in association with host trees of the family Pinaceae. We have conducted a series of studies investigating the ecology and evolutionary biology of the EM symbiosis shared between R. subgenus Villosuli and trees of the genus Pseudotsuga. Two members...
    Resource Type:
    Dissertation
    Full Text:
    ecology and evolutionary biology of the EM symbiosis shared between R. subgenus Villosuli and trees of