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Exploring phylogeny of Rhodococcus fascians isolates using 16S ribosomal DNA sequence analysis

Creator:: Sandberg, Eva Song
Abstract:: Rhodococcus fascians is a Gram-positive, pleiomorphic actinomycete that causes leafy gall formation in a wide range of plant hosts. This particular phytopathogen has been a focus of research at the Oregon State University Plant Clinic, a diagnostic laboratory. Phylogeny of R. fascians isolates obtained from Plant Clinic submissions was determined...
Resource Type:: Honors College Thesis
Full Text:: environmental stress by colonizing more protected regions of the plant such as junctions of epidermal cell walls

Study on the Evolution and Expression of the Pyoverdine Receptor FpvA inPseudomonas aeruginosa

Creator:: Singh, Amandip
Abstract:: Pseudomonas aeruginosa is a ubiquitous gram-negative bacterium that is capable of causing infections in people who are immune compromised. The bacterium can live in a variety of environments due to the variety of virulence factors it can produce. It is well adapted to living in iron-stringent conditions because it can...
Resource Type:: Honors College Thesis
Full Text:: siderophore called pyoverdine. Pyoverdines are transported back into the cell through a ferripyoverdine

Induction of apple defense genes by Erwinia amylovora and biological control agents

Creator:: Bauer, Lisa M.
Abstract:: Fire blight is a serious disease of apple and pear trees caused by the bacterium, Erwinia amylovora. This bacterium harbors a pathogenesis mechanism known as the Hrp secretory operon which induces some resistance genes and suppresses other resistance genes in the host plant following invasion. While previous researchers analyzed expression...
Resource Type:: Honors College Thesis
Full Text:: research may illustrate the variability of plant defense behavior in a changing environment

Metagenomics and metatranscriptomics of the leaf- and root-associated microbiomes of Zostera marina and Zostera japonica

Creator:: Wojahn, John Michael Adrian
Abstract:: A great deal of research has been focused on the microbiomes of terrestrial angiosperms (flowering plants), but much less research has been performed on the microbiomes of aquatic angiosperms (Turner et al. 2013). Eelgrass beds are extremely productive ecosystems that provide habitat for many marine organisms, such as fish, shellfish,...
Resource Type:: Honors College Thesis
Full Text:: study, the phylogenetic composition of plant-associated bacterial communities was not significantly

Characterization of Quorum-Sensing Diversity in Environmental Pseudomonas aeruginosa Populations

Creator:: Grellmann, Elise Kaylene
Abstract:: While the quorum-sensing (QS) diversity of the opportunistic pathogen Pseudomonas aeruginosa has been well established in cystic fibrosis (CF) lung infections and in vitro experiments, little is known about its QS-diversity in natural environments. One significant QS-deficient behavior is social cheating. Social cheaters contain mutations that prevent them from producing...
Resource Type:: Honors College Thesis
Full Text:: were in the rhl and pqs genes. We theorize that the compost environment provides fewer selective

Gene-specific antibiotic development: Evaluating effectiveness and investigating antibiotic-resistant Escherichia coli mutants of phosphorodiamidate morpholino oligomers

Creator:: Puckett, Susan E.
Abstract:: Phosphorodiamidate morpholino oligomers (PMOs) are novel antisense drugs in the early stages of development. These synthetic DNA mimics contain the same bases found in DNA and anneal to RNA in a complementary fashion. PMOs have been designed that target genes responsible for producing essential proteins in organisms such as Escherichia...
Resource Type:: Honors College Thesis
Full Text:: Escherichia coli. After the PMOs get into the bacterial cell (with peptides attached to facilitate their

Development of Fluorometric Assay for the Determination of β-glucosidase Activity in Brewing Yeasts

Creator:: Molitor, Andrew
Abstract:: Glycosides are natural molecules found in many plants and hold potential to release new flavors and aromas into alcoholic beverages, particularly beer and wine. One way to free these flavors and aromas is by enzymatic hydrolysis catalyzed by βglucosidase. The activities of β-glucosidase are strain and species dependent in yeast...
Resource Type:: Honors College Thesis
Full Text:: . .................................................................................... 28 Figure 11: Bar chart representing cell-associated and extracellular β-glucosidase

Distribution of Chlorociboria species in riparian forests of Western Oregon

Creator:: Kramer, Olivia E.
Abstract:: Transects were run at five locations in the Benton County area searching for samples of Chlorociboria spp. on dead wood, with fifteen total samples found. Of these samples, eight samples had the wood species identified, with the majority found on Acer macrophyllum and one on Salix spp. The density of...
Resource Type:: Honors College Thesis
Full Text:: types of wood available, Italy had a good environment for Chlorociboria growth (1). The Little Ice Age

Transcription Factors Associated with Tomato Seed Germination

Creator:: Sun, Jing
Abstract:: Seed germination is strictly defined as the physiological events before radicle protrusion through the endosperm cap, the endosperm region adjacent to the radicle tip. There are two opposing forces governing seed germination: the growth potential of the embryo and the mechanical resistance of the endosperm cap. The endosperm cap cell...
Resource Type:: Honors College Thesis
Full Text:: biosynthesis and response during Arabidopsis seed germination. The Plant Cell 15: 1591-1604. Sambrook J

Studies on the evolution and expression of the Type II ferripyoverdine receptor gene fpvAIIb in Pseudomonas aeruginosa

Creator:: Glover, Rochelle
Abstract:: When iron levels are low, the opportunistic pathogen Pseudomonas aeruginosa secretes the high-affinity iron-binding siderophore pyoverdine. The cognate ferripyoverdine receptor, FpvA, has gained attention as the most divergent gene in the organism’s genome, showing substantial evidence of positive selection. S-type pyocins, bacteriocins with specificity to Pseudomonads, enter cells through FpvA...
Resource Type:: Honors College Thesis
Full Text:: called siderophores, which bind iron (III) in the environment and transport it into the cell through

ScholarsArchive@OSU

Exploring phylogeny of Rhodococcus fascians isolates using 16S ribosomal DNA sequence analysis

Study on the Evolution and Expression of the Pyoverdine Receptor FpvA inPseudomonas aeruginosa

Induction of apple defense genes by Erwinia amylovora and biological control agents

Metagenomics and metatranscriptomics of the leaf- and root-associated microbiomes of Zostera marina and Zostera japonica

Characterization of Quorum-Sensing Diversity in Environmental Pseudomonas aeruginosa Populations

Gene-specific antibiotic development: Evaluating effectiveness and investigating antibiotic-resistant Escherichia coli mutants of phosphorodiamidate morpholino oligomers

Development of Fluorometric Assay for the Determination of β-glucosidase Activity in Brewing Yeasts

Distribution of Chlorociboria species in riparian forests of Western Oregon

Transcription Factors Associated with Tomato Seed Germination

Studies on the evolution and expression of the Type II ferripyoverdine receptor gene fpvAIIb in Pseudomonas aeruginosa

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