Index Catalog // ScholarsArchive@OSU

Relationships between Swiss needle cast and ectomycorrhizal fungus diversity

Creator:: Luoma, Daniel L. and Eberhart, Joyce L.
Abstract:: Swiss needle cast (SNC) is a disease specific to Douglas-fir (Pseudotsuga menziesii) caused by the ascomycete Phaeocryptopus gaeumannii. Here we examine characteristics of the EM fungus community that are potentially useful in predictive models that would monitor forest health. We found that mean EM density (number of colonized root tips/soil...
Resource Type:: Article
Full Text:: needle cast and ectomycorrhizal fungus diversity Daniel L. Luoma1 Joyce L. Eberhart Department of

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

Creator:: Trammell, Caleb, Eberhart, Joyce, and Parke, Jennifer L.
Abstract:: Weed management is one of the main challenges for organic agriculture. Soil solarization has been shown to be an effective mitigation strategy for weeds and soil borne plant pathogens but few studies have been conducted in cooler climates such as the Pacific Northwest.
Resource Type:: Poster

Fire history in three vegetation types on the eastern side of the Oregon Cascades

Creator:: Bork, Joyce L.
Abstract:: Historic fire return intervals in three different vegetation types dominated by ponderosa pine (Pinus ponderosa Laws.) were determined using fire scarred trees. Dendrochronological techniques were used to achieve accuracy in dating fire scars on samples collected from six 40 acre plots established in each site. Mean fire return intervals (MFRI)...
Resource Type:: Dissertation

A focused look at the Alpine fault, New Zealand: seismicity, focal mechanisms, and stress observations

Creator:: Leitner, Beate, Eberhart-Phillips, Donna, Anderson, Helen, and Nabelek, John L.
Abstract:: The Alpine fault is the Pacific-Australian plate boundary in the South Island of New Zealand. This study analyzes 195 earthquakes recorded during the 6 month duration of the Southern Alps Passive Seismic Experiment (SAPSE) in 1995/1996 and two M₁. 5.0 earthquakes and aftershocks in 1997, which occurred close to the...
Resource Type:: Article

Genome Sequencing and Transposon Mutagenesis of Burkholderia seminalis TC3.4.2R3 Identify Genes Contributing to Suppression of Orchid Necrosis Caused by B-gladioli

Creator:: Araújo, Welington L., Creason, Allison L., Mano, Emy T., Camargo-Neves, Aline A., Minami, Sonia N., Chang, Jeff H., and Loper, Joyce E.
Abstract:: From a screen of 36 plant-associated strains of Burkholderia spp., we identified 24 strains that suppressed leaf and pseudobulb necrosis of orchid caused by B. gladioli. To gain insights into the mechanisms of disease suppression, we generated a draft genome sequence from one suppressive strain, TC3.4.2R3. The genome is an...
Resource Type:: Article

Ethanol and High-Value Terpene Co-Production from Lignocellulosic Biomass of Cymbopogon flexuosus and Cymbopogon martinii

Creator:: Joyce, Blake L., Zheljazkov, Valtcho D., Sykes, Robert, Cantrell, Charles L., Hamilton, Choo, Mann, David G., Rodriguez, Miguel, Mielenz, Jonathan R., Astatkie, Tess, and Stewart, C. Neal, Jr.
Abstract:: Cymbopogon flexuosus, lemongrass, and C. martinii, palmarosa, are perennial grasses grown to produce essential oils for the fragrance industry. The objectives of this study were (1) to evaluate biomass and oil yields as a function of nitrogen and sulfur fertilization, and (2) to characterize their utility for lignocellulosic ethanol compared...
Resource Type:: Article
Full Text:: -Production from Lignocellulosic Biomass of Cymbopogon flexuosus and Cymbopogon martinii Joyce, B. L

Genomic sequencing and transposon mutagenesis of a biocontrol strain of Burkholderia seminalis identify genes essential to suppression of orchid necrosis caused by B. gladioli

Creator:: Araújo, Welington L., Creason, Allison L., Mano, Emy T., Neves, Aline A. C., Minami, Sonia N., Chang, Jeff H., and Loper, Joyce E.
Abstract:: 36 strains of Burkholderia spp. isolated from sugarcane were evaluated for biological control of leaf and pseudobulb necrosis of orchid caused by B. gladioli. 29 of the sugarcane strains suppressed the disease in greenhouse assays. We generated a draft genomic sequence of one suppressive strain, B. seminalis TC3.4.2R3. The genome...
Resource Type:: Dataset

Ferric-Pyoverdine Recognition by Fpv Outer Membrane Proteins of Pseudomonas protegens Pf-5

Creator:: Hartney, Sierra L., Mazurier, Sylvie, Girard, Maeva K., Mehnaz, Samina, Davis, Edward W. II, Gross, Harald, Lemanceau, Philippe, and Loper, Joyce E.
Abstract:: The soil bacterium Pseudomonas protegens Pf-5 (previously called P. fluorescens Pf-5) produces two siderophores, enantio-pyochelin and a compound in the large and diverse pyoverdine family. Using high-resolution mass spectroscopy, we determined the structure of the pyoverdine produced by Pf-5. In addition to producing its own siderophores, Pf-5 also utilizes ferric...
Resource Type:: Article
Full Text:: Proteins of Pseudomonas protegens Pf-5 Sierra L. Hartney,a* Sylvie Mazurier,b Maëva K. Girard,c Samina

Boom-bust Cycles in Gray Whales Associated with Dynamic and Changing Arctic Conditions

Creator:: Stewart, Joshua D., Joyce, Trevor W., Durban, John W., Calambokidis, John, Fauquier, Deborah, Fearnbach, Holly, Grebmeier, Jacqueline M., Lynn, Morgan, Manizza, Manfredi, Perryman, Wayne L., Tinker, M. Tim, and Weller, David W.
Abstract:: Climate change is impacting a wide range of global systems, with polar ecosystems experiencing the most rapid change. While climate impacts affect lower trophic level and short-lived species most directly, it is less clear how long-lived and mobile species will respond to rapid polar warming, as they may have the...
Resource Type:: Article
Full Text:: , 43 (2009). 22. W. L. Perryman, T. Joyce, D. W. Weller, J. W. Durban, Environmental factors

Secondary Metabolism and Interspecific Competition Affect Accumulation of Spontaneous Mutants in the GacS-GacA Regulatory System in Pseudomonas protegens

Creator:: Yan, Qing, Lopes, Lucas D., Shaffer, Brenda T., Kidarsa, Teresa A., Vining, Oliver, Philmus, Benjamin, Song, Chunxu, Stockwell, Virginia O., Raaijmakers, Jos M., McPhail, Kerry L., Andreote, Fernando D., Chang, Jeff H., and Loper, Joyce E.
Abstract:: Secondary metabolites are synthesized by many microorganisms and provide a fitness benefit in the presence of competitors and predators. Secondary metabolism also can be costly, as it shunts energy and intermediates from primary metabolism. In Pseudomonas spp., secondary metabolism is controlled by the GacS-GacA global regulatory system. Intriguingly, spontaneous mutations...
Resource Type:: Article
Full Text:: ,e Virginia O. Stockwell,c Jos M. Raaijmakers,e Kerry L. McPhail,d Fernando D. Andreote,b Jeff H

ScholarsArchive@OSU

Relationships between Swiss needle cast and ectomycorrhizal fungus diversity

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

Fire history in three vegetation types on the eastern side of the Oregon Cascades

A focused look at the Alpine fault, New Zealand: seismicity, focal mechanisms, and stress observations

Genome Sequencing and Transposon Mutagenesis of Burkholderia seminalis TC3.4.2R3 Identify Genes Contributing to Suppression of Orchid Necrosis Caused by B-gladioli

Ethanol and High-Value Terpene Co-Production from Lignocellulosic Biomass of Cymbopogon flexuosus and Cymbopogon martinii

Genomic sequencing and transposon mutagenesis of a biocontrol strain of Burkholderia seminalis identify genes essential to suppression of orchid necrosis caused by B. gladioli

Ferric-Pyoverdine Recognition by Fpv Outer Membrane Proteins of Pseudomonas protegens Pf-5

Boom-bust Cycles in Gray Whales Associated with Dynamic and Changing Arctic Conditions

Secondary Metabolism and Interspecific Competition Affect Accumulation of Spontaneous Mutants in the GacS-GacA Regulatory System in Pseudomonas protegens

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