Index Catalog // ScholarsArchive@OSU

The Role of Intraspecific Functional Trait Variation in the Differential Decline of Meadow Species Following Conifer Encroachment

Creator:: Celis, Jessica
Abstract:: In the Oregon Cascade Range, conifer encroachment has reduced the extent of mountain meadows by as much as 50% since the mid-1940s. Although encroachment results in a general decline of meadow species abundance and diversity, species differ in their sensitivities to encroachment: some show rapid declines whereas others persist in...
Resource Type:: Masters Thesis
Full Text:: Jessica Celis for the degree of Master of Science in Botany and Plant Pathology presented on June 2, 2015

Response of the nitrogen-fixing lichen Lobaria pulmonaria to phosphorus, molybdenum, and vanadium

Creator:: Marks, Jade A., Pett-Ridge, Julie C., Perakis, Steven S., Allen, Jessica L., and McCune, Bruce
Abstract:: Nitrogen-fixing lichens (cyanolichens) are an important source of nitrogen (N) in Pacific Northwest forests, but limitation of lichen growth by elements essential for N fixation is poorly understood. To investigate how nutrient limitation may affect cyanolichen growth rates, we fertilized a tripartite cyanobacterial lichen (Lobaria pulmonaria) and a green algal...
Resource Type:: Article
Full Text:: ,1,3,� JULIE C. PETT-RIDGE,1 STEVEN S. PERAKIS,2 JESSICA L. ALLEN,3,4 AND BRUCE MCCUNE3 1Department of

Crown Gall of Grape Rootstocks

Creator:: Miller, Marilyn L., Tooley, Katie, Ferguson, Kathleen, Toma, Kyle, Mentzer, Jessica, and Moore, Larry W.
Abstract:: Crown gall can develop on grapevines wounded by freezing temperatures, mechanical damage or grafting. Pathogenic agrobacteria residing within the vascular system are able to initiate tumor growth in damaged plant cells. Sampling from 21 sites in Oregon vineyards and nurseries yielded diverse populations of pathogenic agrobacteria. Most of the pathogenic...
Resource Type:: Technical Report
Full Text:: L. Miller, Katie Tooley, Kathleen Ferguson, Kyle Toma Jessica Mentzer and Larry Moore Department

Development and Testing of Bacteria Free Grapevines for Prevention of Crown Gall in Oregon Nurseries and Vineyards

Creator:: Miller, Marilyn L., Moore, Larry W., Mentzer, Jessica, Dierenfield, Lora, Ferguson, Kathleen, Candolfi-Vasconcelos, M. Carmo, and Castagnoli, Steve
Abstract:: Agrobacterium vitis is a bacterium that causes crown gall in grapevines. Plant injury from freezing temperatures or mechanical damage during cultivation often provide wounds required for infection to occur. Crown gall may kill grapevines and a new shoot is often brought up from the root to replace dead vines. Discovery...
Resource Type:: Technical Report
Full Text:: , Jessica Mentzer, Lora Dierenfield, Kathleen Ferguson Department of Botany and Plant Pathology Carmo

The Plant Actin Cytoskeleton Responds to Signals from Microbe-Associated Molecular Patterns

Creator:: Henty-Ridilla, Jessica L., Shimono, Masaki, Li, Jiejie, Chang, Jeff H., Day, Brad, and Staiger, Christopher J.
Abstract:: Plants are constantly exposed to a large and diverse array of microbes; however, most plants are immune to the majority of potential invaders and susceptible to only a small subset of pathogens. The cytoskeleton comprises a dynamic intracellular framework that responds rapidly to biotic stresses and supports numerous fundamental cellular...
Resource Type:: Article
Full Text:: Signals from Microbe-Associated Molecular Patterns Jessica L. Henty-Ridilla1, Masaki Shimono2, Jiejie Li1

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:: REPRODUCTIVE ECOLOGY OF LARIX LARICINA IN INTERIOR ALASKA BY KEVIN R. BROWN A THESIS Submitted to OREGON

New Tools for Managing Erysiphe necator: Rapid Sampling Approaches and an Exploration of Grower Opinions and Perspectives towards Collective Action and Information Transfer

Creator:: Lowder, Sarah R.
Abstract:: The scale of pest and disease dispersal is often larger than the scale of individual farms. Therefore, an individual grower’s response to pests and diseases can affect and is affected by their surrounding growing region. Individual growers are also not isolated, and engage in various forms of information gathering, sharing,...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Sarah R. Lowder for the degree of Doctor of Philosophy in Botany and

The infection and colonization of Douglas-fir needles by the Swiss needle cast pathogen, Phaeocryptopus gaeumannii (Rhode) Petrak

Creator:: Capitano, Bryan R.
Abstract:: Phaeocryptopus gaeumannii is a pathogenic fungus on Douglas-fir needles which has become a serious threat to timber production in the last decade along the Oregon coast This research was undertaken to describe the general biology and pathology of F. gaeumannii on Douglas-fir needles and how environmental variables affect fungal development....
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Bryan R. Capitano for the degree

Distinct Argonaute-mediated 22G-RNA pathways direct genome surveillance in the C. elegans germline

Creator:: Gu, Weifeng, Shirayama, Masaki, Conte Jr., Darryl, Vasale, Jessica, Batista, Pedro J., Claycomb, Julie M., Moresco, James J., Youngman, Elaine, Keys, Jennifer, Stoltz, Matthew J., Chen, Chun-Cheih G., Chaves, Daniel A., Duan, Shenghua E., Kasschau, Krisitin D., Fahlgren, Noah, Yates III, John R., Mitani, Shohei, Carrington, James C., and Mello, Craig C.
Abstract:: Endogenous small RNAs (endo-siRNAs) interact with Argonaute (AGO) proteins to mediate sequence-specific regulation of diverse biological processes. Here, we combine deep-sequencing and genetic approaches to explore the biogenesis and function of endo-siRNAs in C. elegans. We describe conditional alleles of the dicer-related helicase, drh-3, that abrogate both RNA interference and...
Resource Type:: Article
Full Text:: surveillance in the C. elegans germline Weifeng Gu1,8, Masaki Shirayama1,8, Darryl Conte Jr.1,8,*, Jessica

Morphology, ultrastructure and mating of sporidia of a wheat-bunt fungus, Tilletia caries (DC.) Tul.

Creator:: Kollmorgen, James Frederick
Abstract:: The teliospore of Tilletia caries germinates to produce a promycelium with a whorl of primary sporidia at its tip. The time between emergence of the promycelium and the development of primary sporidia averaged 2.3 h. Fusion between compatible sporidia occurred within an additional 3.8 h. Primary sporidia appeared to be...
Resource Type:: Dissertation
Full Text:: thanks is also extended to the other members of my graduate committee: Drs. M. H. Chaplin, W. M. Hess, R

ScholarsArchive@OSU

The Role of Intraspecific Functional Trait Variation in the Differential Decline of Meadow Species Following Conifer Encroachment

Response of the nitrogen-fixing lichen Lobaria pulmonaria to phosphorus, molybdenum, and vanadium

Crown Gall of Grape Rootstocks

Development and Testing of Bacteria Free Grapevines for Prevention of Crown Gall in Oregon Nurseries and Vineyards

The Plant Actin Cytoskeleton Responds to Signals from Microbe-Associated Molecular Patterns

Growth and reproductive ecology of Larix laricina in interior Alaska

New Tools for Managing Erysiphe necator: Rapid Sampling Approaches and an Exploration of Grower Opinions and Perspectives towards Collective Action and Information Transfer

The infection and colonization of Douglas-fir needles by the Swiss needle cast pathogen, Phaeocryptopus gaeumannii (Rhode) Petrak

Distinct Argonaute-mediated 22G-RNA pathways direct genome surveillance in the C. elegans germline

Morphology, ultrastructure and mating of sporidia of a wheat-bunt fungus, Tilletia caries (DC.) Tul.

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