Index Catalog // ScholarsArchive@OSU

Evaluation of the colonization and biofilm production by Burkholderia pyroccinia FP62 on geranium leaves

Creator:: Wallace, Patricia K.
Abstract:: The leaf surface is a stark environment for bacterial colonists with limited availability of nutrients, water and protected niches. Despite these limitations, a plethora of bacteria appear to have adapted ways to survive and flourish on leaf surfaces. One mechanism of survival is the formation of biofilms. Biofilms are a...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Patricia K. Wallace

Some properties of ribonucleotide reductase in Rhizobium species

Creator:: Cowles, Joe Richard, 1941-
Abstract:: Ribonucleotide reductase from Rhizobium meliloti has been partially purified and characterized. The enzymatic reduction of ribonucleotides to deoxyribonucleotides is dependent upon B₁₂ coenzyme and dihydrolipoate. B₁₂ coenzyme was more effective than B₁₂ coenzyme analogues in the reductase reaction. The affinity of the R. meliloti reductase system for B₁₂ coenzyme was...
Resource Type:: Dissertation
Full Text:: species AN ABSTRACT OF THE THESIS OF JOE RICHARD COWLES (Name) BOTANY in (PLANT PHYSIOLOGY) (Major

Modification of phyllosphere environments to enhance establishment of Gliocladium roseum, an antagonist of Botrytis cinerea

Creator:: Bennett, Robert J. (Robert Joe), 1953-
Abstract:: Radial colony growth of three isolates of Gliocladium roseum and three isolates of Bottytis cinerea were measured on 1/4 strength potato dextrose agar amended with concentrations of NaHCO₃ ranging from 0-2% (w/v). Compared to the control, reductions in colony diameter of the B. cinerea isolates ranged from 60-79% and 73-89%...
Resource Type:: Masters Thesis
Full Text:: 41.5 a 0.25 58.9 a 64.63 b 37.06 c 0.5 52.1 c 53.44 c 32.06 d 1.0 30.73 d 36.06 d 26.69 e 2.0 19.53

Evaluation of Grape Powdery Mildew Forecasting Programs Grape (Vitis vinifera 'Chardonnay') Powdery Mildew (Uncinula necator)

Creator:: Pscheidt, J. W., Wallace, L. D., Hall, T., and Mahaffee, W.
Abstract:: Three forecasting programs for scheduling fungicide applications were selected for comparison with the standard Oregon phenology based program. The California (Gubler-Thomas, UC-Davis) program used leaf wetness and temperature early in the year to predict ascospore infection periods and only temperature during the summer to predict conidial infection periods. The New...
Resource Type:: Technical Report
Full Text:: , L. D. Wallace, T. Hall, and W. Mahaffee Dept. of Botany and Plant Pathology Oregon State

Male gametophyte specific expression helps identify a conserved gene associated with increased pollen fitness

Creator:: Colebrook, Sean Jr., Unger-Wallace, Erica, and Vollbrecht, Erik
Abstract:: GRMZM2G372877 was identified as a gene with potential function in the male gametophyte based on its strong expression in mature pollen relative to other maize tissues (Chettoor et al. 2014). Identification of a Ds insertion mutation in this gene from the Brutnell/Vollbrecht collection provided further support for this hypothesis, as...
Resource Type:: Poster
Full Text:: (2010). Acknowledgements • Supported by NSF grant IOS-1340050 to M Evans (PI), D. Auger, J. Fowler

Seeing Genes: Multiscale Phenotyping Reveals Gene Functions in Maize Pollen

Creator:: Warman, Cedar D.
Abstract:: Plant sexual reproduction requires a broad array of molecular mechanisms to proceed successfully. Some of these mechanisms are well-studied, but our knowledge of them as a whole is fundamentally incomplete. Pollen tube growth is a key part of this process, facilitating the delivery of the sperm cells to the female...
Resource Type:: Dissertation
Full Text:: Trans Syst Man Cybern 9:62–66 Palanivelu R, Preuss D (2006) Distinct short-range ovule signals

Reproductive isolation and interspecific hybridization in the threatened species, Sidalcea nelsoniana

Creator:: Gisler, Steven D.
Abstract:: In addition to its longstanding recognition as an influential evolutionary process, interspecific hybridization is increasingly regarded as a potential threat to the genetic integrity and survival of rare plant species, manifested through gamete wasting, increased pest and disease pressures, outbreeding depression, competitive exclusion, and genetic assimilation. Alternatively, hybridization has also...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Steven D. Gisler for the

Overwintering of Erysiphe necator and Inoculum Monitoring for Decision Aids

Creator:: Thiessen, Lindsey D.
Abstract:: Grape powdery mildew (Erysiphe necator) causes economic damages to grape worldwide due to the cost of management and injury to berries. Each region where European grapevine (Vitis vinifera) is grown experiences a unique epidemic, and disease prediction models that are based on empirical correlations of weather data to disease fail...
Resource Type:: Dissertation
Full Text:: Lindsey D. Thiessen for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

Description of the plant communities and succession of the Oregon coast grasslands

Creator:: Ripley, James Douglas
Abstract:: In an effort to describe the plant communities and succession of the Oregon coastal grasslands, vegetation and environmental data were collected from 75 stands at 24 separate locations ranging from Cape Falcon in Tillamook County to Cape Ferrelo in Curry County. The vegetation data consisted of cover and frequency values...
Resource Type:: Dissertation
Full Text:: thank the other members of my graduate committee, Professors Kenton L. Chambers, Garvin D. Crabtree

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Creator:: Wright, Carolyn E.
Abstract:: Astragalus diaphanus is a rare plant endemic to the John Day River drainage of north-central Oregon. This species has several interesting features, including the dimorphism of its fruit and its geographical isolation from the two nearest taxonomically related species, which occur in Colorado. This study addressed the species' distribution and...
Resource Type:: Masters Thesis
Full Text:: . Chambers, Dr. T.C. Moore, Dr. R. Frenkel, and Dr. D. Baisted, for their interest and careful reading of

ScholarsArchive@OSU

Evaluation of the colonization and biofilm production by Burkholderia pyroccinia FP62 on geranium leaves

Some properties of ribonucleotide reductase in Rhizobium species

Modification of phyllosphere environments to enhance establishment of Gliocladium roseum, an antagonist of Botrytis cinerea

Evaluation of Grape Powdery Mildew Forecasting Programs Grape (Vitis vinifera 'Chardonnay') Powdery Mildew (Uncinula necator)

Male gametophyte specific expression helps identify a conserved gene associated with increased pollen fitness

Seeing Genes: Multiscale Phenotyping Reveals Gene Functions in Maize Pollen

Reproductive isolation and interspecific hybridization in the threatened species, Sidalcea nelsoniana

Overwintering of Erysiphe necator and Inoculum Monitoring for Decision Aids

Description of the plant communities and succession of the Oregon coast grasslands

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

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