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Filtering by: Creator Olson, Gregory A. Remove constraint Creator: Olson, Gregory A. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Language English [eng] Remove constraint Language: English [eng] Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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Development, reproductive morphology, and cytology of Halosaccion glandiforme (Gmelin) Ruprecht (Rhodophyceae, Palmariales)

Creator:

Mitman, Grant Gregory

Abstract:

Halosaccion glandiforme, a member of the family Palmariaceae, is a common macrophyte found in the high to middle intertidal zones of the north temperate Pacific Ocean. Plants were grown in culture from spores and the lift history was critically examined by the use of scanning EM and light microscopy. H....

Resource Type:

Masters Thesis

Full Text:

Gregory Mitman for the degree of Master of Science in Botany and Plant Pathology presented on August 17
Biological and molecular characterization of wild type parental and nonpathogenic mutant strains of Pseudomonas syringae pathovars phaseolicola and syringae

Creator:

Bertoni, Gregory

Abstract:

The in planta growth of three wild type strains of phytopathogenic bacteria and three nonpathogenic mutant strains was studied to determine if mutations eliminating the ability of the mutant strains to cause disease had affected their growth in leaf tissue. The mutant strains were obtained by Tn5 mutagenesis of Pseudomonas...

Resource Type:

Masters Thesis

Full Text:

Strains of Pseudomonas svringae pathovars phaseolicola and svringae by Gregory Bertoni A THESIS
Litter decay processes and soil nitrogen availability in native and cheatgrass-dominated arid rangelands

Creator:

Harrison, Kristen S.

Abstract:

As large-scale restorations of degraded rangelands are initiated, land managers need to understand how decades of dominance by the invasive annual grass, cheatgrass (Bromus tectorum L.), have altered ecosystem processes. One way to assess such alterations is by observing differences in decay rates, since decomposition is determined by factors such...

Resource Type:

Masters Thesis

Full Text:

approved David A. Pyke Kate Lajtha As large-scale restorations of degraded rangelands are initiated, land
Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

Creator:

Gonen, Lilah

Abstract:

Pseudotsuga menziesii var. menziesii (coast Douglas-fir) is a tree of ecological, economic, and cultural value in its native North American Pacific Northwest (PNW) distribution. P. menziesii is host to a variety of well-documented endophytic foliar microorganisms, including the fungus Nothophaeocryptopus gaeumannii, the causal agent of Swiss needle cast (SNC), and...

Resource Type:

Masters Thesis

Full Text:

Report. Oregon Forest Research Institute, Portland, OR. Olson, D. H., P. D. Anderson, C. A. Frissell
Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Creator:

DiLeone, Julie A.

Abstract:

This study quantified the frequency of simple versus complex races of Puccinia striiformis Westend. in mixtures of wheat cultivars possessing different race-specific resistance genes. A simple race of a pathogen can infect only one component, and a complex race of the pathogen can infect two or more components of an...

Resource Type:

Masters Thesis

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Puccinia striiformis races AN ABSTRACT OF THE THESIS OF Julie A. DiLeone for the degree of Master of
Using local climate to explain temporal variation in rare plant populations

Creator:

Pfingsten, Ian A.

Abstract:

Increased temperatures due to anthropogenic-induced climate change may raise the threat of extinction for taxa with sessile life histories (e.g., plants) in the near future. Linking climate change models to demographic models may provide useful insights into the potential effects of environmental changes on rare plants, and therefore aid in...

Resource Type:

Masters Thesis

Full Text:

AN ABSTRACT OF THE THESIS OF Ian A. Pfingsten for the degree of
Fungal Secondary Metabolism of Basidiobolus meristosporus: a Novel Natural Product Reservoir

Creator:

Trautman, Ian A.

Abstract:

Secondary metabolites (SMs) play an integral role in the life history of most fungal species. Fungal metabolomic studies provide insights into how fungi perform certain ecological functions, how they compete and interact with other organisms, and the breadth of fungal chemodiversity. Fungal SMs have also been utilized for a variety...

Resource Type:

Masters Thesis

Full Text:

AN ABSTRACT OF THE THESIS OF Ian. A. Trautman for
Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Creator:

Marks, Jade A.

Abstract:

Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....

Resource Type:

Masters Thesis

Full Text:

THE THESIS OF Jade A. Marks for the degree of Master of Science in Botany and Plant Pathology and
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
Mitigating cyanobacterial harmful algae blooms : the role of plant humics

Creator:

Theis, Susan A. F.

Abstract:

Cyanobacterial harmful algae blooms (cyanoHABs) are a growing concern worldwide due to damage of ecosystems and threats to human health. Previous research indicates that plant humics from aquatic and wetland vascular plants are effective inhibitors of cyanobacterial metabolism and growth and may be useful as control agents for mitigating cyanoHABs....

Resource Type:

Masters Thesis

Full Text:

: ____________________________________________ Allen J Milligan Abstract: Cyanobacterial harmful algae blooms (cyanoHABs) are a

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Academic Affiliation

Botany and Plant Pathology[remove]45
Crop and Soil Science1

Advisor

Mcintire, C. David3
Powelson, Mary L.3
Wilson, Mark V.3
Kaye, Tom2
Lajtha, Kate2
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Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1924 to 2022

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Committee Member

Johnson, Ken2
Johnson, Kenneth B.2
Parke, Jennifer L.2
Swanson, Fred2
Acker, Steve1
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Creator

Bedwell, Jesse Leonard1
Berlanger, Ingrid E.1
Bertoni, Gregory1
Brodhagen, Marion L.1
Brown, Kevin R.1
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Contributor

Mcphail, Kerry1
Spatafora, Joseph W.1
Tabima, Javier F.1
Tehan, Richard1

Date

Date range begin – Date range end

Current results range from 1924 to 2021

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Decade

2020-20292
2010-201911
2000-20099
1990-19999
1980-19898
1970-19792
1960-19693
1920-19291

Degree Field

Botany and Plant Pathology41
Botany4
Crop and Soil Science1

Degree Level

Master's45

Degree Name

Master of Science (M.S.)44
Master of Arts (M.A.)1

File Format

application/pdf2

Language

English [eng][remove]45

License

All rights reserved19

Location

Panama, , Panama, (Administrative Boundary)1

Non-Academic Affiliation

Oregon State University. Graduate School42

Peer Reviewed

No44

Resource Type

Masters Thesis[remove]45

Rights Statement

Copyright Not Evaluated23
In Copyright21
No Copyright - United States1

Subject

Phytophthora ramorum2
Algae -- Cultures and culture media1
Anisogramma anomala -- Spores -- Oregon1
Asteraceae -- Climatic factors -- Oregon -- Baker county1
Asteraceae -- Effect of global warming on -- Oregon -- Baker county1
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