Index Catalog // ScholarsArchive@OSU

The reproductive ecology of the pacific yew (Taxus brevifolia nutt.) under a range of overstory conditions in western Oregon

Creator:: DiFazio, Stephen P.
Abstract:: The influence of overstory openness on the reproductive ecology of Pacific yew (Taxus brevifolia Nutt.) was investigated on 4 sites in western Oregon over 2 years. The breeding system of T. brevifolia was found to deviate from pure dioecy under a broad range of canopy and site conditions. Production of...
Resource Type:: Masters Thesis
Full Text:: entire committee, including Don Minore and George Somero, showed remarkable patience and

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:: Stressors on Communities of Wheat and Wild Oats. Abstract approved: Christopher C. Mundt Most plant

Factors determining species composition of post-disturbance vegetation following logging and burning of an old growth Douglas-fir forest

Creator:: Clark, Deborah Louise, 1950-
Resource Type:: Masters Thesis
Full Text:: which he gave me exceptional guidance and encouragement. thank my committee members, Don Zobel and Dave

Port-Orford-cedar and Phytophthora lateralis : grafting and heritability of resistance in the host, and variation in the pathogen

Creator:: McWilliams, Michael G.
Abstract:: Port-Orford-cedar (Chamaecyparis lawsoniana) is a forest tree native to a small area of Oregon and California. A root disease caused by Phytophthora lateralis causes widespread mortality of Port-Orford-cedar. This dissertation examines three important elements of the Port-Orford-cedar P. lateralis pathosystem related to breeding for disease resistance: use of resistant rootstocks...
Resource Type:: Dissertation
Full Text:: yellow- cedar were provided by Don Carson and John Russell, and Don and the crew at the Cowician Lake

Growth and reproductive ecology of Larix laricina in interior Alaska

Creator:: Brown, Kevin R.
Abstract:: Larix laricina in Alaska occurs on sites ranging from productive slopes and riverbottoms to wet bogs underlain by permafrost. It is largest on sites without permafrost, where it is associated with Picea glauca, but is much more common in bogs, where it occurs with Picea mariana. In this study, I...
Resource Type:: Masters Thesis
Full Text:: by November 1. Germination in the laboratory is inhibited at or below 10 deg C. At 12 and 15 deg

A biochemical analysis of the interaction of victorin and oats

Creator:: Navarre, Duroy A.
Abstract:: Victoria blight of oats is caused by the fungus Cochhobolus victoriae. This fungus is pathogenic due to its ability to produce the host-selective toxin victorin. Previously, a 100-kD protein that binds victorin in vivo only in susceptible genotypes was identified as the P protein of the glycine decarboxylase complex (GDC)....
Resource Type:: Dissertation
Full Text:: members, Dr. Don Armstrong, Dr. Terri Lomax and Dr. Dallice Mills for their guidance and generous use of

Morphological and cytological variation in Trillium albidum Freeman (Liliaceae)

Creator:: Bledsoe, Karen E.
Abstract:: This work was performed on Trillium albidum Freeman (Liliaceae), to clarify the pattern of morphological variation between the small-flowered populations at the northern limit of its range ( T. parviflorum Soukup) and the larger-flowered populations from southern Oregon and northern California. It was hypothesized that only a single species of...
Resource Type:: Masters Thesis
Full Text:: serving on my thesis committee. Dr. Robert Frenkel, Dr. Don Zobel, and Dr. Lee Eddleman were the other

The effects of a mutation within vitamin E biosynthesis upon the development and function of the photosynthetic apparatus

Creator:: Sicher, Richard Charles
Abstract:: A new photosystem-II mutant of the green alga Scenedesmus obliquus D₃, strain PS-28, has been shown to lack a-tocopherol (vitamin E). The photosynthetic activity of dark grown samples of PS-28 is about 20% of the wild-type control. Culturing the mutant at low light intentisites (10⁴ ergs/sec-cm ²) stimulates photosynthetic activity...
Resource Type:: Dissertation
Full Text:: photosynthetic process. The levels of vitamin E were analyzed during the greening of mutant C -2A'. In dark

Invaded range of the blackberry pathogen Phragmidium violaceum in the Pacific Northwest of the USA and the search for its provenance

Creator:: Morin, Louise, Gomez, Don R., Evans, Katherine J., Neill, Tara M., Mahaffee, Walt F., and Linde, Celeste C.
Abstract:: Field surveys in 2006 confirmed that the exotic rust fungus Phragmidium violaceum was widespread on Rubus armeniacus and Rubus laciniatus in the Pacific Northwest of the USA. The origin and dispersal pattern of this obligate biotrophic pathogen in the USA were investigated by comparing the genetic diversity and structure of...
Resource Type:: Article
Full Text:: Louise Morin • Don R. Gomez • Katherine J. Evans • Tara M. Neill • Walt F. Mahaffee • Celeste C. Linde

Integration and excision of pMMC7105 in Pseudomonas syringae pv. phaseolicola occur by recombination between copies of a repetitive IS-like sequence

Creator:: Ehrenshaft, Marilyn
Resource Type:: Dissertation
Full Text:: Drs. Ralph Quatrano, George Pearson, Larry Moore, Al Ferro and Don Armstrong for serving as members

ScholarsArchive@OSU

The reproductive ecology of the pacific yew (Taxus brevifolia nutt.) under a range of overstory conditions in western Oregon

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

Factors determining species composition of post-disturbance vegetation following logging and burning of an old growth Douglas-fir forest

Port-Orford-cedar and Phytophthora lateralis : grafting and heritability of resistance in the host, and variation in the pathogen

Growth and reproductive ecology of Larix laricina in interior Alaska

A biochemical analysis of the interaction of victorin and oats

Morphological and cytological variation in Trillium albidum Freeman (Liliaceae)

The effects of a mutation within vitamin E biosynthesis upon the development and function of the photosynthetic apparatus

Invaded range of the blackberry pathogen Phragmidium violaceum in the Pacific Northwest of the USA and the search for its provenance

Integration and excision of pMMC7105 in Pseudomonas syringae pv. phaseolicola occur by recombination between copies of a repetitive IS-like sequence

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