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  • Growth and reproduction of annual bluegrass (Poa annua) in response to trinexepacethyl or prohexadione-calcium at multiple rates and application timings

    Creator:
    Faletti, Matthew T.
    Abstract:
    Field experiments were conducted in 2002 and 2003 in the Willamette Valley of Oregon to investigate the effects of two plant growth regulators on the growth and reproduction of the weed annual bluegrass. Previous research suggested that the plant growth regulator prohexadione-calcium hastened senescence of annual bluegrass. Another plant growth...
    Resource Type:
    Masters Thesis
    Full Text:
    effects of two plant growth regulators on the growth and reproduction of the weed annual bluegrass

  • Plant growth regulators and shattering control in cool-season perennial grasses

    Creator:
    Lee, Suk-Kyun
    Abstract:
    Shattering is a natural phenomenon of floret and spikelet disarticulation across abscission layers of the pedicel and rachilla, respectively, after seed maturation. Seed shattering in cool-season grasses and native grass species is an economic problem in seed production. This study was conducted to determine whether the use of the plant...
    Resource Type:
    Masters Thesis

  • Identification and characterization of type III effector proteins in plant-associated bacteria

    Creator:
    Thomas, William J.
    Abstract:
    Symbioses between microbes and multicellular eukaryotes are found in all biomes, and encompass a spectrum of symbiotic lifestyles that includes parasitism and disease, commensalism, and mutually beneficial interdependent host-microbe relationships. Regardless of outcome, these symbiotic lifestyles are governed by a complex molecular "courtship" between microbe and potential host. This courtship...
    Resource Type:
    Dissertation
    Full Text:
    ........................................................................................ 80 TABLE OF CONTENTS (Continued) Page Bacterial strains, plant lines and growth conditions

  • An emerging role for the exocyst : plant morphogenesis

    Creator:
    Cole, Rex A.
    Abstract:
    Plants develop a vast array of cell shapes and sizes by selectively modifying their surrounding cell walls to expand in some regions and not in others. This process of morphogenesis requires the delivery of secretory vesicles to specific locations at the cell periphery, where exocytosis adds new membrane and proteins...
    Resource Type:
    Dissertation
    Full Text:
    plant morphogenesis in at least three developmental processes: polarized growth in pollen tubes, cell

  • Competitive interactions in young, coastal Douglas-fir/red alder mixtures : implications for wood quality

    Creator:
    Grotta, Amy T.
    Abstract:
    When Douglas-fir and red alder grow in mixture, interactions between the two species can be competitive, facilitative, or a combination of both over time. A number of factors have recently led to increased interest in managing these two species together for commercial production, and ongoing investigations are yielding important information...
    Resource Type:
    Masters Thesis

  • Foliar respiration in an old-growth coniferous forest

    Creator:
    Cooper, Clifton E.
    Abstract:
    Foliar respiration forms a large component of the carbon balance of any coniferous forest. We examine seasonal, interannual, spatial and interspecific variation of foliar maintenance respiration in a forest in Washington, USA, with measurements made quarterly for >4 years on 400-year old trees of Pseudotsuga menziesii, Tsuga heterophylla and Thuja...
    Resource Type:
    Dissertation
    Full Text:
    atmosphere, nearly all of it through leaves. Carbohydrate is allocated to growth of plant parts including

  • Growth in herbaceous perennials

    Creator:
    Nakajima, Rie
    Abstract:
    Several studies of herbaceous perennials have addressed the effects of environmental factors during and after production, inherent cold hardiness, and post-harvest handling procedures to enhance flowering and growth during establishment. The regrowth of both woody and herbaceous forage plants following establishment is reported to be directly related to reserve-nitrogen content....
    Resource Type:
    Masters Thesis
    Full Text:
    growth between nurseries when grown outdoors, but it appears this was not due to their initial plant

  • Factors affecting the regrowth of Himalya (sic) blackberry (Rubus armeniacus)

    Creator:
    Jones, Daniel Karl
    Abstract:
    Himalaya blackberry (Rubus armeniacus) is a widespread, exotic, invasive plant now common over much of western Oregon and Washington. An observational experiment revealed that disturbance to a monoculture of Himalaya blackberry allows the soil seed bank to be expressed and return the inhabited area to an earlier successional stage. This...
    Resource Type:
    Masters Thesis
    Full Text:
    , invasive plant now common over much of western Oregon and Washington. An observational experiment

  • Maintenance of normal vegetative growth via attenuation of barnase as an agent of floral tissue ablation in Populus

    Creator:
    Wei, Hao
    Abstract:
    To reduce the environmental impacts caused by gene flow from transgenic trees, reproductive sterility genes have been developed that use a floral regulatory element linked to a cell toxin. This results in dysfunction or ablation of floral tissues, causing sterility. However, floral promoters often permit low levels of expression in...
    Resource Type:
    Masters Thesis
    Full Text:
    his help in plant tissue sampling, plant growth measurements, and experimental design; Dr. Amy

  • Genome scale transcriptome analysis and development of reporter systems for studying shoot organogenesis in poplar

    Creator:
    Bao, Yanghuan
    Abstract:
    Vegetative propagation allows the amplification of selected genotypes for research, breeding, and commercial planting. However, efficient in vitro regeneration and genetic transformation remains a major obstacle to research and commercial application in many plant species. Our aims are to improve knowledge of gene regulatory circuits important to meristem organization, and...
    Resource Type:
    Masters Thesis