Index Catalog // ScholarsArchive@OSU

The effects of defoliation on Bromus tectorum seed production and growth

Creator:: Mayer, Kara Hempy
Abstract:: Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
Resource Type:: Masters Thesis
Full Text:: approved: 7 i/ David A, Pyke and Mark V. Wilson Cheatgrass (Bromus tectorum L.) is a widespread exotic

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Creator:: Bomberger, Rachel A.
Abstract:: Commercial radish seed producers in the Willamette Valley of Oregon have observed a late season wilt in their seed fields. Twenty-two fields were surveyed for wilt in the Willamette Valley during June through August 2012 and 2013. Plants exhibiting wilt symptoms were collected from the fields and examined for vascular...
Resource Type:: Masters Thesis
Full Text:: examined, while V. dahliae (=V. longisporium) was recovered from 0.2% of the 440 plants. In 2013

Conservation biology of Plagiobothrys hirtus (Boraginaceae) : evaluation of life history and population enhancement

Creator:: Amsberry, Kelly
Abstract:: Plagiobothrys hirtus (Boraginaceae) is a state and federally listed endangered plant found only in Douglas County, Oregon. This vernal pool endemic has historically been threatened by agricultural conversion of seasonal wetlands in the Sutherlin area, and is currently being eradicated as habitat is lost due to the rapid urban development...
Resource Type:: Masters Thesis

Conservation of Oenothera wolfii (Onagraceae) : introducing a threatened plant into two protected locations in Oregon

Creator:: Currin, Rebecca E.
Abstract:: The showy biennial to short-lived perennial Oenothera wolfii (Munz) Raven, Dietrich & Stubbe (Wolf’s evening primrose) occurs in only a small number of isolated populations on the southern Oregon and northern California coast. This rare species is currently listed as Threatened in Oregon, and is considered a Species of Concern...
Resource Type:: Masters Thesis

Autecology, reproductive ecology, and demography of Astragalus australis var. olympicus (Fabaceae)

Creator:: Kaye, Thomas N.
Abstract:: The goal of this study was to gather information on the autecology, reproductive ecology, and population dynamics of Astragalus australis var. olympicus as a baseline for conservation strategies and to help explain its restricted range. Approximately four thousand individuals occurred in four known population centers in the Olympic Mountains, Olympic...
Resource Type:: Masters Thesis
Full Text:: Implications of sensitivity analyses 93 Assumptions of the model 95 Literature Cited 97 CHAPTER V: SYNTHESIS

Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Creator:: Tuori, Robert P.
Resource Type:: Dissertation
Full Text:: -repentis has also been described as polygenic 13 (Cantrell et al., 1985; Elias et al., 1989), however

Conservation biology of Perideridia erythrorhiza (Apiaceae) : experimental reintroduction and life history

Creator:: Roberts, Kimberly A.
Abstract:: An experimental reintroduction was performed to determine the best method to create new populations of the tuberous species Perideridia erythrorhiza, a rare vascular plant endemic to southern Oregon. Only a handful of sites are currently present, and many of these are subject to other land uses such as urban development...
Resource Type:: Masters Thesis
Full Text:: cold stratification................ 91 V LIST OF TABLES Table Page 2.1 The total number and

Conservation of Rorippa columbiae : an evaluation of reintroduction potential through the study of germination ecology, propagation methods, and habitat requirements

Creator:: Kentnesse, Laura E.
Abstract:: Rare plant reintroductions are a critical conservation tool for the augmentation of diminishing populations, or re-establishment of extirpated populations. Analysis of reintroduction failures suggests that a sophisticated understanding of species biology, ecology, and habitat is essential for producing self-sustaining rare plant populations. This study sought to generate that background knowledge...
Resource Type:: Masters Thesis
Full Text:: impacts. In Conservation and management of rare and endangered plants, edited by T.S. Elias, 413-420

Cytokinin oxidase activity from Phaseolus vulgaris L. cv. Great Northern callus tissues

Creator:: Chatfield, J. Mark
Abstract:: Cytokinin oxidase activity in callus tissues of Phaseolus vulgaris L. cv. Great Northern has been examined using an assay based on the oxidation of radioactively labeled N⁶ -(Δ² -isopentenyl) adenine (i⁶Ade) to adenine (Ade). Conditions for the quantitative extraction and assay of the enzyme have been established. The substrate specificity...
Resource Type:: Dissertation
Full Text:: Literature Cited 112 V. CYTOKININ OXIDASE ACTIVITY FROM CALLUS TISSUES OF PHASEOLUS VULGARIS L. CV. GREAT

Genomic Resources for Phylogenetics, Species Delimitation, and Geographic Localization of Neotropical Tree Species Cedrela odorata L. (Meliaceae)

Creator:: Finch, Kristen N.
Abstract:: Biodiversity loss is of global concern, and is due in part to deforestation and high consumer demand for wood and wood products. The neotropical tree species Cedrela odorata (“Spanish cedar” or “cedro”) is economically valuable for its wood and faces threats of overexploitation. Due to strong similarities in wood features...
Resource Type:: Dissertation
Full Text:: practices involving the removal of living trees from forests around the world (Nellemann 2012; Elias

ScholarsArchive@OSU

The effects of defoliation on Bromus tectorum seed production and growth

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Conservation biology of Plagiobothrys hirtus (Boraginaceae) : evaluation of life history and population enhancement

Conservation of Oenothera wolfii (Onagraceae) : introducing a threatened plant into two protected locations in Oregon

Autecology, reproductive ecology, and demography of Astragalus australis var. olympicus (Fabaceae)

Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Conservation biology of Perideridia erythrorhiza (Apiaceae) : experimental reintroduction and life history

Conservation of Rorippa columbiae : an evaluation of reintroduction potential through the study of germination ecology, propagation methods, and habitat requirements

Cytokinin oxidase activity from Phaseolus vulgaris L. cv. Great Northern callus tissues

Genomic Resources for Phylogenetics, Species Delimitation, and Geographic Localization of Neotropical Tree Species Cedrela odorata L. (Meliaceae)

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