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Filtering by: Creator Blakemore, Paul R. Remove constraint Creator: Blakemore, Paul R. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology

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  • Physiology of senescence of the shoot apex in Pisum sativum L.

    Creator:
    Ecklund, Paul Richard, 1941-
    Abstract:
    Shoot apex senescence is defined as the collective progressive and deteriorative processes which ultimately terminate the functional life of the shoot apex. Senescence of shoot apices of Pisum sativum L. 'Alaska' as measured by cessation of stem elongation was delayed by removal of flowers and by treatment with gibberellin A₃...
    Resource Type:
    Dissertation
    Full Text:
    sativum L. AN ABSTRACT OF THE THESIS OF PAUL RICHARD ECKLUND for the (Name) Ph. D. (Degree) in

  • Development and control of benomyl-tolerant Botrytis cinerea strains on snap beans (Phaseolus vulgaris)

    Creator:
    Johnson, Earl Ray
    Abstract:
    Benomyl-tolerant Botrytis cinerea was found in snap bean fields throughout the Willamette Valley while no tolerant isolates of Whetzelinia sclerotiorum were detected. Thirty-five benomyl-tolerant isolates of B. cinerea had slower radial growth rates than eighteen benomyl-sensitive isolates. Sporulation of an aggressive tolerant isolate was not stimulated when grown on benomyl-treated...
    Resource Type:
    Masters Thesis
    Full Text:
    AND CONTROL OF BENOMYL-TOLERANT BOTRYTIS CINEREA STRAINS ON SNAP BEANS (PHASEOLUS VULGARIS) Dr. Paul

  • 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
    Full Text:
    , written in the R statistical language, available on all computing platforms. This package is designed for

  • Conservation genetics of Kincaid's lupine : a threatened plant of western Oregon and southwest Washington grasslands

    Creator:
    Severns, Paul M.
    Abstract:
    Kincaid's lupine (Lupinus oreganus Heller) is a federally listed threatened species native to remnant grassland of western Oregon and southwestern Washington, and is the primary larval host plant of a once thought extinct butterfly, Plebejus icarioides fenderi Macy. Past studies concerning Kincaid's lupine reproduction suggested that populations may suffer reductions...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Paul M. Severns for the

  • Partial characterization of the P4 pathotype of pea seedborne mosaic virus

    Creator:
    Kohnen, Paul D.
    Abstract:
    Biological, serological, and molecular characteristics of the P4 pathotype of pea seedborne mosaic potyvirus (PSbMV) were investigated. The characterization allowed P4 to be differentiated from other pathotypes of the same virus. P4 was distinguished from P1 on the basis of host symptomatology. It induced varied, but often distinctive symptoms in...
    Resource Type:
    Dissertation
    Full Text:
    seedborne mosaic virus An Abstract of the Thesis of Paul D. Kohnen for the degree of Doctor of Philosophy

  • Factors influencing the development of onion pink root disease incited by Pyrenochaeta terrestris (Hansen) Gorenz, Walker, Larson

    Creator:
    Pack, Paul Eugene
    Abstract:
    A study was conducted of the influence of various climatic and soil factors on the development of onion pink root disease and of the influences of temperature, light, pH, carbon and nitrogen sources, and vitamins on the growth in vitro of an Oregon isolate of the pink root fungus, Pyrenochaeta...
    Resource Type:
    Masters Thesis
    Full Text:
    PAUL EUGENE PACK for the M. S. (Name) Date thesis is presented in PLANT PATHOLOGY (Degree) (Major

  • Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

    Creator:
    Hessburg, Paul F.
    Abstract:
    Verticicladiella wageneri Kendr. is a vascular wilt pathogen of Douglas-fir in the Pacific Northwest, The disease is characterized by black staining of colonized sapwood; crown symptoms are those typical of a wilting syndrome. Histopathological studies revealed that the pathogen is limited to the xylem but causes vascular dysfunction in both...
    Resource Type:
    Dissertation
    Full Text:
    wageneri in Douglas-fir (Pseudotsuga menziesii) AN ABSTRACT OF THE THESIS OF Paul Francis Hessburg for

  • Pathological and ecological aspects of decline and mortality of Chamaecyparis nootkatensis in southeast Alaska

    Creator:
    Hennon, Paul Edward
    Abstract:
    Alaska-cedar (Chamaecvparis nootkatensIs (D. Don) Spach) is a valuable tree that is suffering from a serious decline and mortality of unknown cause throughout southeast Alaska. Epidemiological and pathological studies were initiated to determine if a pathogen is the primary cause of this problem. By examining old aerial photographs and by...
    Resource Type:
    Dissertation
    Full Text:
    mortality of Chamaecyparis nootkatensis in southeast Alaska AN ABSTRACT OF THE THESIS OF Paul

  • Factors influencing the production and survival of inoculum of Elytroderma deformans

    Creator:
    Laird, Peter Paul
    Abstract:
    This study concerns factors affecting production and survival of ascospores of Elytroderma deformans (Weir) Darker, a needle cast of ponderosa pine (Pinus ponderosa Laws.). The results show that summer cooling and a reduction in host vigor delays and diminishes the number of fertile hysterothecia produced. Evidence is offered for classification...
    Resource Type:
    Masters Thesis
    Full Text:
    Inoculum of Elytroderma Deformans AN ABSTRACT OF THE THESIS OF PETER PAUL LAIRD for the M. S. (Name

  • Incompatibility reactions and nuclear condition of three Phellinus species

    Creator:
    Hennon, Paul E.
    Abstract:
    Phellinus arctostaphyli (Long) Niemela, P. igniarius (L. ex Fr.) Quel., and P. tremulae (Bond.) Bond. et Boriss., heartrotting hymenomycetes in the family Hymenochaetaceae (Aphyllophorales), all conform to a multi-allelic heterothallic mating system. Both compatible and incompatible reactions result from pairings of homokaryons from the same basidiocarp. Homokaryons isolated from different...
    Resource Type:
    Masters Thesis
    Full Text:
    Phellinus species AN ABSTRACT OF THE THESIS OF Paul Edward Hennon for the degree of Master of Science in