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  • Powdery mildew (Podosphaera macularis Braun & Takamatsu) resistance in wild hop genetic resources

    Creator:
    Smith, Jodi M.
    Abstract:
    Hop powdery mildew, caused by Podosphaera macularis Braun & Takamatsu (formerly Sphaerotheca macularis (Wallr. :Fr.) Lind, syn. S. humuli (DC.)Burrill) was not observed in Pacific Northwest hop yards until 1997, when it was discovered in Washington. Within one year, it had spread to Oregon and Idaho. This emerging disease caused...
    Resource Type:
    Masters Thesis

  • The influence of parasite ecology on the genetic structure of parasite populations

    Creator:
    Criscione, Charles David
    Abstract:
    Parasites are unique study organisms for evolutionary ecologists. Yet, molecular ecology studies on parasites have lagged far behind those on free-living organisms. The goal of the review in Chapter 2 was to illustrate areas of research that may be of particular interest in relation to the parasitic life style and...
    Resource Type:
    Dissertation

  • Biology of chlamydospores of Phytophthora ramorum

    Creator:
    Smith, Aaron Lee
    Abstract:
    The chlamydospore is a survival spore produced by 35 of the 75 described species of Phytophthora. Phytophthora ramorum Werres, de Cock & Man in't Veld, the causal agent of Sudden Oak Death (SOD), produces abundant chlamydospores in artificial culture and plant tissue. The chlamydospore is likely the most important survival...
    Resource Type:
    Masters Thesis
    Full Text:
    . Henrik Stotz for serving as my graduate representative, his statistical advice, and his interest in

  • Genetic dissection of Victoria blight disease susceptibility in Arabidopsis thaliana

    Creator:
    Sweat, Teresa A.
    Abstract:
    The fungus Cochliobolus victoriae causes Victoria blight of oats and Arabidopsis and is pathogenic due to its production of a compound called victorin, which induces programmed cell death in sensitive plants. Victorin sensitivity in Arabidopsis is conferred by the dominant gene LOCUS ORCHESTRATING VICTORIN EFFECTS1 (LOV1), which encodes a coiled-coil-nucleotide...
    Resource Type:
    Dissertation
    Full Text:
    members, Lynda Ciuffetti, Joyce Loper, Dahong Zhang, Henrik Stotz, and Jeff Chang for their advice and

  • Study of seed germination-associated genes using Arabidopsis enhancer-trap

    Creator:
    Liu, Po-Pu
    Abstract:
    In mature Arabidopsis seeds, the testa (seed coat) is no longer a living tissue. Thus, major sites of gene expression in imbibed seeds are the internal living tissues such as the embryo and the endosperm. To elucidate the molecular mechanisms of seed germination, the gene regulation in these two tissues...
    Resource Type:
    Dissertation
    Full Text:
    members, Dr. Raymond M. Brooks, Dr. Oscar Riera-Lizarazu, Dr. Henrik Stotz and Dr. Ruth C. Martin for