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Plant communities of the grassy balds of Marys Peak, Oregon

Creator:: Snow, Billy Douglas
Resource Type:: Masters Thesis
Full Text:: Wimple after his sister Mary. In another version, the Marys River was named by Wayman St.Clair for Mary

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Creator:: Bender, Carol Lavane
Abstract:: Studies were conducted on pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae, causal agent of rose powdery mildew. Methods were developed for isolation and identification of Sphaerotheca pannosa var. rosae races on rose. Monoconidial isolates were initiated on detached leaves, increased on host plants, and inoculated to rose cultivars...
Resource Type:: Masters Thesis
Full Text:: pannosa var. rosae, causal agent of rose powdery mildew. Methods were developed for isolation and

Effects of fire on seedling establishment in upland prairies in the Willamette Valley, Oregon

Creator:: Maret, Mary P.
Abstract:: Prior to European settlement, native prairie dominated the landscape of the Willamette Valley. Today, due to urbanization, agriculture, and the cessation of burning, only isolated remnants of these grasslands still exist. In response to conservation concerns, there has been a move to restore the remaining prairies in the Willamette Valley,...
Resource Type:: Masters Thesis
Full Text:: in the Willamette Valley, Oregon AN ABSTRACT OF THE THESIS OF Mary P. Maret for the degree of

Bioindication of air quality in forests of northern and central California using epiphytic macrolichen communities

Creator:: Jovan, Sarah
Abstract:: The unifying purpose of this dissertation was to describe, model, and map relationships between epiphvtic macrolichen communities and air quality in Ibrests of northern and central California. First, multivariate analyses were used to subdivide the large study area into three model areas with similar climate, topography, and lichen communities: the...
Resource Type:: Dissertation
Full Text:: nieiiibet's, Pat Muir, Mary Santelmann, Janet Ohmann. and Richard Dick. for their support and encouragement

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

Creator:: Garrett, Karen A.
Abstract:: Most studies of plant disease epidemiology have focused on epidemics in host populations composed of a single genotype. But crop plant diversity can be a useful means of improving the deployment of resistance genes. In a series of experiments with wheat stripe rust and potato late blight, we studied factors...
Resource Type:: Dissertation
Full Text:: , Ken Johnson, Mary Powelson, and Tim Schowalter, for their support in the preparation of this work

Growth and replacement patterns occuring among selected dominant species associated with plant succession on Douglas fir clear-cuts

Creator:: Robinson, Myles Canby
Abstract:: Growth and replacement patterns of four successionally important species occurring on Douglas fir clear-cuts were investigated from September 1964 to June 1967. The study was carried out on the Marys Peak watershed located near Corvallis, Oregon. Species used in the study include Holcus lanatus, Senecio jacobaea, Lotus crassifolius var. subglaber,...
Resource Type:: Dissertation

Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

Creator:: Hural, Kirsten
Abstract:: The influence of atmospheric humidity on three aspects of sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor., which causes rose powdery mildew, was studied on leaf disks of susceptible Rosa cultivar Samantha. To study conidiophore production, leaf disks were inoculated on the adaxial (upper) surface with conidia of S....
Resource Type:: Masters Thesis
Full Text:: . 7 2. Rose powdery mildew infection on petals of cv. Mary Devor. 8 3. Twisted and misshapen leaves

Population viability analysis of endangered plant species : an evaluation of stochastic methods and an application to a rare prairie plant

Creator:: Kaye, Thomas N.
Abstract:: Transition matrix models are one of the most widely used tools for assessing population viability. The technique allows inclusion of environmental variability, thereby permitting estimation of probabilistic events, such as extinction. However, few studies use the technique to compare the effects of management treatments on population viability, and fewer still...
Resource Type:: Dissertation
Full Text:: interns that have helped over the years, including (in chronological order) Tom Brophy, Mary Garrard

Acyl-ACP thioesterases and beta-ketoacyl-ACP synthase regulate fatty acid chain length in seed oils of Cuphea wrightii

Creator:: Leonard, Jeffrey M.
Resource Type:: Dissertation
Full Text:: of self confidence. I am forever indebted to Dr. Mary B. Slabaugh, who taught me the techniques of

Comparative anatomical study of three species of Microseris

Creator:: Soedjono, Estiti Harti
Abstract:: Three growth forms of the genus Microseris, of the tribe Cichorieae, family Compositae, were compared with respect to their anatomical structure. The purpose of this study was to clarify lines of evolutionary specialization in the genus. Two of the three species studied, M. laciniata and M. borealis, are perennials, while...
Resource Type:: Dissertation
Full Text:: root. The cortex is persistent in all three species. Mic rose ris lindleyi pro duces a relatively

ScholarsArchive@OSU

Plant communities of the grassy balds of Marys Peak, Oregon

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Effects of fire on seedling establishment in upland prairies in the Willamette Valley, Oregon

Bioindication of air quality in forests of northern and central California using epiphytic macrolichen communities

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

Growth and replacement patterns occuring among selected dominant species associated with plant succession on Douglas fir clear-cuts

Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

Population viability analysis of endangered plant species : an evaluation of stochastic methods and an application to a rare prairie plant

Acyl-ACP thioesterases and beta-ketoacyl-ACP synthase regulate fatty acid chain length in seed oils of Cuphea wrightii

Comparative anatomical study of three species of Microseris

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