Index Catalog // ScholarsArchive@OSU

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Creator:: Holub, Scott M.
Abstract:: Forests in the Pacific Northwest receive very little nitrogen through atmospheric deposition and thus studying the nitrogen cycle in this region can provide insights into how the unpolluted nitrogen cycle functions. I examined the fate of organic nitrogen versus inorganic nitrogen and the effect of tamlins on N retention by...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Scott M. Holub for the

Phytophthora species and riparian alder tree damage in western Oregon

Creator:: Sims, Laura L.
Abstract:: The genus Phytophthora contains some of the most destructive pathogens of forest trees, including the most destructive pathogen of alder in recent times, Phytophthora alni. Alder trees were reported to be suffering from canopy dieback in riparian ecosystems in western Oregon, which prompted a survey of alder health and monitoring...
Resource Type:: Dissertation
Full Text:: Tree Damage in Western Oregon Abstract approved: Everett M. Hansen The genus Phytophthora

Identification and distribution of the mating-type locus and development of cleistothecia of Podosphaera macularis

Creator:: Wolfenbarger, Sierra N.
Abstract:: Podosphaera macularis, causal agent of hop powdery mildew, is known to produce cleistothecia (syn. chasmothecia) in eastern North America and Europe, but ascocarps are not reported from the Pacific Northwestern region of North America. Reasons for the apparent absence of cleistothecia in the Pacific Northwest are unknown. We established that...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ David H. Gent Podosphaera macularis, causal agent of hop powdery mildew, is known to

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Creator:: Lenz, Ryan R.
Abstract:: Managers of forest and plantation ecosystems are encountering growing problems involving plant pathogens and the expanding geographic ranges of these pathogens. Historically unexposed stands are exceptionally vulnerable when a non-native pathogen is introduced because these pathogens can cause devastating disease in a host population that lacks co-evolved resistance mechanisms. One...
Resource Type:: Dissertation
Full Text:: Chen, Dr. Wellington Muchero, Dr. Trent R. Northern, and Dr. Jared M. LeBoldus oversaw the research

Enhancement of biological control for postharvest diseases of pear

Creator:: Benbow, Jesse M.
Abstract:: Yeast biocontrol agents that were applied to 'Bose' and 'Anjou' pears in the field up to three weeks prior to harvest were found to survive on the fruit at high population levels on both pear varieties. Cryptococcus infirmo-miniatus, Cryptococcus laurentii, and Rhodotorula glutinis maintained populations averaging 5 x 10⁶ cfu/fruit...
Resource Type:: Masters Thesis
Full Text:: . A., R. G. Roberts, H. W. Ewart, D. Sugar, G. Apel, M. Willet, and E. Kupferman. 1992. Residue

Examinations of Fusarium sambucinum on Humulus lupulus and co-infection with hop stunt viroid in commercial hop fields

Creator:: Cerruti, Natasha R.
Abstract:: After an unusually high incidence of Fusarium canker was observed in commercial hop fields of the Pacific Northwest, field surveys were conducted and revealed that canker incidence ranged from 20 to 60% of bines sampled in six commercial fields, as well as wide-spread Hop stunt viroid infection in these six...
Resource Type:: Masters Thesis
Full Text:: the genus Cannabis AN ABSTRACT OF THE THESIS OF Natasha R. Cerruti for the degree of

Seed and seedling ecology of Artemisia tridentata in a restoration context

Creator:: Wijayratne, Upekala C.
Abstract:: The semi-arid sagebrush steppe ecosystem is one of the largest biomes in North America. The steppe provides critical habitat and forage for wildlife and is economically important to recreation and livestock industries. However, the ecosystem is threatened primarily due to several negative effects associated with expansion of the exotic annual...
Resource Type:: Dissertation
Full Text:: . Journal of Arid Environments 57:445-466. Noss, R. F., E. T. LaRoe III, and J. M. Scott. 1995

Synthesis and assembly of Fucus zygote cell walls with an emphasis on alignate and fucans

Creator:: Doubet, Scott
Abstract:: Fucus distichus L. Powell zygotes were used to investigate cell wall synthesis and development and to construct a model of cell wall structure. Alginate synthesis was investigated. Zygotes were cultured in seawater containing ¹⁴C-bicarbonate. Alginate represented 12%, 37%, and 1.7% of the label recovered from whole zygotes, wall, and cytoplasm,...
Resource Type:: Dissertation
Full Text:: of Gra to SchoOl (r Date Thesis is Presented July 1, 1982. Typed by Dianne L. Webster for Scott

Annual cycles of ecological disturbance and recovery underlying the subarctic Atlantic spring plankton bloom

Creator:: Behrenfeld, Michael J., Doney, Scott C., Lima, Ivan, Boss, Emmanuel S., and Siegel, David A.
Abstract:: Satellite measurements allow global assessments of phytoplankton concentrations and, from observed temporal changes in biomass, direct access to net biomass accumulation rates (r). For the subarctic Atlantic basin, analysis of annual cycles in r reveals that initiation of the annual blooming phase does not occur in spring after stratification surpasses...
Resource Type:: Article
Full Text:: during a 60o B 50o 40o 15o 25o 35o45o 55o 65o 75o 5o 0.6 0.8 w in te r so ls tic e b m

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Creator:: Dunnell, Kelsey Liann
Abstract:: Host-parasite interactions between the pathogen, Sphaerulina musiva, and its host, Populus spp., were examined in a series of studies. In the first study, variation in resistance of Populus nigra from 7 locations in Europe was differentiated based on the parameters cankers per cm and disease severity score. The analysis evaluated...
Resource Type:: Dissertation
Full Text:: selection strategies, in: Stettler, R. F., Bradshaw, Jr. H. D., Heilman, P. E., Hinckley, T. M. Biology of

ScholarsArchive@OSU

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Phytophthora species and riparian alder tree damage in western Oregon

Identification and distribution of the mating-type locus and development of cleistothecia of Podosphaera macularis

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Enhancement of biological control for postharvest diseases of pear

Examinations of Fusarium sambucinum on Humulus lupulus and co-infection with hop stunt viroid in commercial hop fields

Seed and seedling ecology of Artemisia tridentata in a restoration context

Synthesis and assembly of Fucus zygote cell walls with an emphasis on alignate and fucans

Annual cycles of ecological disturbance and recovery underlying the subarctic Atlantic spring plankton bloom

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

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