Index Catalog // ScholarsArchive@OSU

Characterization of the molecular foundations and biochemistry of alkane and ether oxidation in a filamentous fungus, a Graphium species.

Creator:: Skinner, Kristin M.
Abstract:: Graphium sp., a eukaryotic alkanotroph, is able to oxidize small-molecular weight gaseous n-alkanes, diethyl ether and the branched ether, methyl tert butyl ether (MTBE). However, information regarding the biochemistry of fungal-mediated alkane and ether metabolism is limited, and questions regarding the identity of alkane oxidation catalysts and the genetic underpinnings...
Resource Type:: Dissertation
Full Text:: ..................................................................... 15 1.2 MTBE metabolic pathways described in bacteria and fungi .......... 16 1.3 The

Investigation of hop downy mildew through association mapping and observations of the oospore

Creator:: Parker, Thomas B.
Abstract:: Hop downy mildew is a devastating disease affecting hop requiring expensive fungicide applications throughout the growing season. Plant resistance is highly desirable and theorized as being decidedly quantitative with dominance and epistasis involved in resistance. An association mapping approach using a mixed-model was used to identify AFLP markers associated with...
Resource Type:: Dissertation

Effects of disturbance modes on mycorrhizal fungus communities at Crater Lake National Park

Creator:: Trappe, Matt
Abstract:: Crater Lake National Park presents an excellent opportunity for ecological research due to its relatively pristine landscape, the protection of its natural features, its infrastructure, and a Park administration supportive of scientific inquiry and restoration ecology. The research presented here examines the responses of fungi to various forms of perturbation....
Resource Type:: Dissertation
Full Text:: inquiry and restoration ecology. The research presented here examines the responses of fungi to various

Diversity, productivity, and mycophagy of hypogeous mycorrhizal fungi in a variably thinned Douglas-fir forest

Creator:: Colgan, Wesley
Abstract:: Hypogeous fungi are a critical component of forest ecosystems world wide. In Pacific Northwest forests, they are the base of the food chain of the threatened Northern Spotted Owl. As part of The Forest Ecosystem Study (a interdisciplinary study designed to increase development of suitable spotted owl habitat), diversity and...
Resource Type:: Dissertation

Primary succession on a receding glacier forefront : with special emphasis on root-colonizing fungi

Creator:: Jumpponen, Ari
Abstract:: Plant succession is among the fundamental concepts in ecology. Studies addressing plant recruitment, successional mechanisms, and the role of root-colonizing fungi with focus on dark-septate endophytes (DSE) were conducted in the laboratory and on the forefront of receding Lyman Glacier (North Cascade Range, Washington, U.S.A.). Primary successional studies primarily focus...
Resource Type:: Dissertation

Ecology and biological control of an apomictic invasive plant, Chondrilla juncea (Asteraceae)

Creator:: Campanella, Donald M.
Abstract:: A study consisting of three parts was undertaken to investigate how variation in species interactions, population genetic structure, epidemiological parameters, and plant breeding system may influence the ecology and biological control of an apomictic invasive plant, Chondrilla juncea (Asteraceae). Interactions between natural enemy species may modify their net effect on...
Resource Type:: Dissertation
Full Text:: ). Virtually all plants harbor parasitic symbioses with natural enemies such as pathogenic fungi, bacteria

Studies towards the total syntheses of (+)-phomactins A, D and G

Creator:: Schwartz, Keith D.
Abstract:: Studies towards the total synthesis of (+)-Phomactin A (1), D (6), and G (9), fungal metabolites with unique molecular architecture and pronounced biological activity, are described. These studies resulted in the synthesis of advanced intermediates 354 and 356, which contain all of the carbon atoms of 1, 6 and 9....
Resource Type:: Dissertation

The effects of mechanical damage on residual coastal Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) following commercial thinning

Creator:: Kiser, James D.
Abstract:: Commercial thinning operations can result in damage to residual stems. A literature review revealed that little was known about the effects of residual logging wounds with regard to rotation-age commercial conifers, particularly Douglas-fir. An experiment to examine fungal colonization of Douglas-fir following logging damage showed that while damage was significant...
Resource Type:: Dissertation
Full Text:: total numbers of fungi, there were no significant differences in the numbers of total fungal taxa

The taxonomy of the genus Hysterangium (Basidiomycotina, Hysterangiaceae) with notes on its ecology

Creator:: Castellano, Michael Angelo
Abstract:: Hysterangium, a genus of hypogeous Basidiomycotina (false truffles) is commonly placed in the Hysterangiaceae and ascribed affinities to the Phallales. It is a large genus among hypogeous taxa and is commonly collected in large numbers in eastern and western North America, Australasia and Europe. Some Hysterangium species are dominant components...
Resource Type:: Dissertation

Distinguishing biological and physical controls on soil respiration

Creator:: Phillips, Claire L.
Abstract:: Soil respiration, or the combined CO₂ emissions from roots and soil microorganisms, constitutes one of the largest losses of carbon (C) from terrestrial ecosystems. The major drivers of soil respiration, which include soil moisture, temperature, and substrate quality, have been known for some time. Nevertheless, correlations between these drivers and...
Resource Type:: Dissertation
Full Text:: of EcM fungi, but it also likely related to moisture impacts on CO2 flux contributions in

Microbial and biochemical dynamics of ectomycorrhizal mat and non-mat forest soils

Creator:: Kluber, Laurel A.
Abstract:: Dense hyphal mats formed by ectomycorrhizal (EcM) fungi are prominent features in Douglas-fir (Pseudotsuga menziesii) forest soils and have been estimated to cover up to 40% of the forest floor in some stands. Although previous studies have examined various aspects of EcM fungi, little is known about their associated microbial...
Resource Type:: Dissertation
Full Text:: formed by ectomycorrhizal (EcM) fungi are prominent features in Douglas-fir (Pseudotsuga menziesii

Application of green fluorescent protein (GFP) for studing interactions between Ophiostoma piceae and Trichoderma harzianum in freshly sawn Douglas-fir sapwood

Creator:: Xiao, Ying
Abstract:: While microbial colonization of wood is presumed to be characterized by a myriad of interactions between numerous organisms, studying these processes is often difficult owing to the opaque nature of the wood and the inability to readily distinguish among the many species colonizing the material. One method for enhancing the...
Resource Type:: Dissertation

Soil community dynamics in sagebrush and cheatgrass-invaded ecosystems of the northern Great Basin

Creator:: DeCrappeo, Nicole M.
Abstract:: Sagebrush steppe ecosystems in the Great Basin have become increasingly threatened by the proliferation of cheatgrass (Bromus tectorum L.), an invasive annual grass. Diverse sagebrush and perennial bunchgrass landscapes can be converted to homogenous cheatgrass grasslands mainly through the effects of fire. Although the consequences of this conversion are well...
Resource Type:: Dissertation
Full Text:: contribution of fungi to inorganic nitrogen (N) mineralization in sagebrush and cheatgrass rhizospheres

Effects of biocide treatment on durability and fungal colonization of teak, western redcedar, and redwood

Creator:: Cabrera Orozco, Yohanna
Abstract:: Treating durable, second-growth or plantation-grown material with supplemental chemicals could improve durability while enhancing the uniformity of the products. To test this hypothesis, the effect of two candidate biocide treatments on the durability of teak, redwood, and western redcedar was assessed in a ground proximity field test established in Hawaii....
Resource Type:: Dissertation
Full Text:: six month intervals over a 24 month period from wood samples in the same field test. Fungi were

Microfungi of preservative treated Douglas-fir poles before and after fumigant treatment

Creator:: Giron, Magdalena Y.
Abstract:: See pdf
Resource Type:: Dissertation

Distribution of preservative chemicals in flakeboard and its effect on board properties and fungal deterioration

Creator:: Jeihooni, Asghar
Abstract:: Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] lumber was converted to flakes, which were dip treated with three concentrations each of copper chrome arsenate Type C (CCA-C), and disodium octaborate tetrahydrate (TIM-BOR). Azaconazole [1-[{2-(2,4-dichloropheny1)-1,3- dioxolan-2-yl}methyl]-1H-1,2,4-triazole] was used as powder. The flakeboard panels (305 x 304 x 13 mm) were made using phenolformaldehyde...
Resource Type:: Dissertation

Effect of nutrients on interactions between two decay fungi and Trichoderma harzianum Rifai on ponderosa pine sapwood wafers

Creator:: Canessa, Edwin
Abstract:: Small size wood assays were utilized to study the effect of added nutrients to the wood on the interactions of Trichoderma harzianum Rifai and two wood decay fungi, Trametes versicolor (white rot) and Gloeophyllum trabeum (brown rot). Weight losses related to time of exposure were monitored as a measure of...
Resource Type:: Dissertation
Full Text:: : Effect of Nutrients on Interactions Between Two Decay Fungi and Trichoderma harzianum Rifai on Ponderosa

Modeling changes in flexural properties of softwood beams during fungal decomposition

Creator:: Mitsuhashi Gonzalez, June M.
Abstract:: Moisture intrusion in residential structures can lead to substantial fungal decay and this damage costs billions in repair/replacement costs. The extent of damage and the rate at which it occurs are primarily dependent on the wood moisture content and temperature in the structure. Determining the risk of decay for various...
Resource Type:: Dissertation
Full Text:: three wood species under varying temperature and moisture conditions for three fungi that commonly

The influence of mold contamination, processing and maturity on the volatiles of the strawberry, Fragaria ananassa Duch.

Creator:: Amos, James Franklin
Abstract:: The effects of mold level (Botrytis cinerea), processing method (fresh, individually quick frozen (IQF), frozen sugared sliced (FSS), freeze dried (FD), canned, and preserves), and maturity (underripe, normal, and overripe) and strawberry volatiles were analyzed by gas liquid chromatography (GLC) using on-column entrainment of headspace volatiles in aqueous extracts. Computerized...
Resource Type:: Dissertation
Full Text:: conditions, thus showing the greatest promise as a single indicator of the fungi tested. Botrytis

Impacts of ponderosa pine forest restoration treatments on the ectomycorrhizal fungal community and fine root biomass in the Blue Mountains of Oregon

Creator:: Smith, Jane E. (Jane Elizabeth)
Abstract:: Before the arrival of Euro-Americans, the inland Pacific Northwest was settled by native people whose frequent intentional burning of the landscape promoted open stands dominated by large fire-resistant ponderosa pine. Fire suppression for nearly a century, livestock grazing, and logging of the largest trees has resulted in forests characterized by...
Resource Type:: Dissertation
Full Text:: . Aboveground ecosystem recovery after disturbance is directly linked to the survival of ectomycorrhizal fungi

Systematics and phylogeny of Cordyceps and the Clavicipitaceae with emphasis on the evolution of host affiliation

Creator:: Sung, Gi-Ho
Abstract:: Cordyceps is a genus of perithecial ascomycetes. It includes over 400 species that are pathogens of arthropods and parasites of the truffle genus Elaphomyces. Based on the morphology of cylindrical asci, thickened ascus apices and filiform ascospores, it is classified in the Clavicipitaceae (Hypocreales), which also includes endophytes and epiphytes...
Resource Type:: Dissertation
Full Text:: ). Multi-gene phylogenetic analyses rejected the monophyly of the Clavicipitaceae. Clavicipitaceous fungi

Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Creator:: Hesse, Cedar N.
Abstract:: Mat-forming ectomycorrhizal (EcM) fungi represent a prevalent constituent of many temperate forest ecosystems and create dramatic changes in soil structure and chemistry. EcM mat soil have been shown to have increased microbial respiration rates and have been hypothesized to harbor unique assemblages of fungi and bacteria. The objectives of this...
Resource Type:: Dissertation
Full Text:: Bacterial Communities Associated with Mat- forming Ectomycorrhizal Fungi from Old-growth Stands in the H.J

Below ground biology of Botrychium pumicola (Ophioglossaceae)

Creator:: Camacho, Francisco J.
Resource Type:: Dissertation
Full Text:: depend on mycorrhzial fungi for their nutrition. Population genetic analysis ofB. pumicola using inter

A biochemical analysis of the interaction of victorin and oats

Creator:: Navarre, Duroy A.
Abstract:: Victoria blight of oats is caused by the fungus Cochhobolus victoriae. This fungus is pathogenic due to its ability to produce the host-selective toxin victorin. Previously, a 100-kD protein that binds victorin in vivo only in susceptible genotypes was identified as the P protein of the glycine decarboxylase complex (GDC)....
Resource Type:: Dissertation
Full Text:: known host-selective toxins are produced by fungi and are usually toxic only to plants that are also

Phylogeny, cospeciation, and host switching in the evolution of the ascomycete genus Rhabdocline on Pseudotsuga and Larix (Pinaceae)

Creator:: Gernandt, David S.
Abstract:: The relative role of cospeciation and host switching in the phylogenetic history of ascomycete foliar symbionts is addressed in the orders Leotiales and Rhytismatales, fungi associated predominantly with Pinaceae (Coniferales). Emphasis is placed on comparing the evolution of the sister genera Pseudotsuga and Larix (Pinaceae) with that of the pathogenic...
Resource Type:: Dissertation
Full Text:: foliar symbionts is addressed in the orders Leotiales and Rhytismatales, fungi associated predominantly

Assessing the impact of microbial pesticides on nontarget insects : laboratory versus field tests

Creator:: James, Rosalind R.
Resource Type:: Dissertation
Full Text:: : Brian A. Croft Many entomopathogenic fungi that are used as microbial pest control agents (MPCAs

Mediation of conifer root growth by mycorrhizal fungi and plant growth regulators

Creator:: Scagel, Carolyn F.
Abstract:: Many mycorrhizosphere microorganisms can produce plant growth regulating compounds in vitro. Plant growth regulating compounds are known to mediate root growth and development. In reforestation practices, conifer tree seedling growth and survival are linked to rapid root growth and development after outplanting. Multifactorial experiments were conducted to document variations in...
Resource Type:: Dissertation
Full Text:: Mediation of conifer root growth by mycorrhizal fungi and

Studies on the centromere-specific histone, CenH3, of Neurospora crassa and related ascomycetes

Creator:: Phatale, Pallavi A.
Abstract:: In eukaryotes, the defined loci on each chromosome, the centromeres, accomplish the critical task of correct cell division. In some organisms, centromeres are composed of a euchromatic central core region embedded in a stretch of heterochromatin and the inheritance and maintenance of centromeres are controlled by dynamic epigenetic phenomena. Although...
Resource Type:: Dissertation
Full Text:: , relatively little is known about centromeres in the filamentous fungi from the Ascomycota, representing the

Mycorrhizal and other root endophytic fungi of lupines in the Pacific Northwest

Creator:: O'Dell, Thomas E.
Abstract:: We investigated the root endophytic fungi of lupine using four approaches: (1) occurrence of fungal colonization in field-collected roots; (2) growth response of L. latifolius to inoculation with two types of fungi; (3) structure of root colonizations of Pinus and Lupinus by Phialocephala fortinii, a septate endophytic fungus of lupine;...
Resource Type:: Dissertation
Full Text:: Mycorrhizal and other root endophytic fungi of lupines

Mycorrhizal fungi and their relationship to plant succession in subalpine habitats

Creator:: Cazares, Efren
Resource Type:: Dissertation
Full Text:: Mycorrhizal fungi and their relationship to plant

Variation in plant response to inoculation with different isolates of vesicular arbuscular mycorrhizal fungi

Creator:: Ianson, David C.
Resource Type:: Dissertation
Full Text:: isolates of vesicular arbuscular mycorrhizal fungi AN ABSTRACT OF THE THESIS OF David C. Ianson for the

Molecular karyotyping of Ustilago hordei and related smut fungi

Creator:: McCluskey, Kevin
Resource Type:: Dissertation
Full Text:: Fungi AN ABSTRACT OF THE THESIS OF Kevin McCluskey for the degree of Doctor of Philosophy in Botany

Approaches toward synthesis of the mycosporins

Creator:: Cammack, Janice H.
Abstract:: The mycosporins, formerly called P310's are secondary metabolites of fungi closely associated with fungal reproductive processes that require light. The structurally related iminomycosporins are found in marine plants and animals and may also have functions related to light. In this study, approaches toward the asymmetric synthesis of the mycosporins are...
Resource Type:: Dissertation
Full Text:: of fungi closely associated with fungal reproductive processes that require light. The structurally

Soil fungal hyphal dynamics and seasonal hypogeous sporocarp production in western Oregon Douglas-fir forests

Creator:: Hunt, Gary, 1945-
Abstract:: Total length and biomass of fungal mycelium in the soil of a young Douglas-fir stand in the central Oregon Coast Range were estimated over 27 months with the agar-film technique. In a second study, phenology and taxonomy of hypogeous (belowground) sporocarps were studied over 32 months in a nearby, young...
Resource Type:: Dissertation
Full Text:: as 11 months for others. Fungi produce the greatest biomass of all soil organisms in temperate

Inoculation of container-grown plants with vesicular-arbuscular mycorrhizae

Creator:: Biermann, Brenda Joan, 1954-
Abstract:: Studies were conducted on inoculation of container-grown plants with vesicular-arbuscular (VA) mycorrhizae. Intraradical vesicles formed in colonized roots were found to serve as propagules and significantly contribute to the infectivity of these roots. A procedure was developed for separating intraradical vesicles from roots; isolated intraradical vesicles were able to colonize...
Resource Type:: Dissertation
Full Text:: fungi. The shoot P concentration of inoculated plants relative to controls increased with increasing

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

Creator:: Keiluweit, Marco
Abstract:: Intimate associations with reactive metal species permanently protect soil organic matter (SOM) from microbial access and oxidation, contributing to the build-up of organic carbon (C) stocks in soils. It is increasingly recognized, however, that such associations can be reversible and that reactive metal species might even facilitate the oxidation of...
Resource Type:: Dissertation
Full Text:: chitin into fungi-dominated microenvironments in O-horizons of old-growth forest soils. At the end of

The β-glucosidase system of the thermophilic fungus Chaetomium thermophile

Creator:: Lusis, Aldons Jekabs
Abstract:: The thermophilic fungus Chaetomium thermophile was shown to contain three major β-glucosidases, a cell-bound cellobiase, a cellbound aryl-β-glucosidase and an extracellular aryl-β-glucosidase. The enzymes were partially purified and studied with respect to thermal stability and certain kinetic parameters. Two of the β-glucosidases are fairly stable at the maximum growth temperature...
Resource Type:: Dissertation
Full Text:: the p-glucosidases of Other Fungi 78 Speculation on the Roles of the p-glucosidases 79 Interpretation

A comparison of soil microfungi in forest stands of Red Alder, Conifer, and Alder-Conifer mixtures

Creator:: Wicklow-Howard, Marcia C. (Marcia Cope) 1943-
Abstract:: The species composition of soil microfungal populations in-adjacent stands of red alder, conifers, and mixed alder conifer correlated strongly with the dominant vascular vegetation. A total of 92 species were isolated: 55 from the alder stand; 45 from the conifers; and 46 from the mixed alder-conifer, with few species (16,...
Resource Type:: Dissertation
Full Text:: . There was little difference in species composition among soil horizons within a stand. Fungi which were

Biology of symbiotic fungi associated with Ambrosia beetles of western United States

Creator:: Roeper, Richard Allen
Abstract:: Eight primary ambrosia fungi, Raffaelea canadensis, R. sulcati, Ambrosiella brunnea, A. ferruginea, A. gnathotrichi, A. hartigii, A. sulcati, and A. sulphurea (Fungi Imperfecti), were found in association with 11 ambrosia beetle species (Scolytidae and Platypodidae). The fungi are reported from new beetle symbionts, new tree hosts, and/or increased geographical distribution....
Resource Type:: Dissertation
Full Text:: Biology of symbiotic fungi associated with Ambrosia

Rhizosphere microfloras associated with mycorrhizae of Douglas-fir and red alder

Creator:: Neal, John Lloyd
Abstract:: The mycorrhizal rootlets of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco.) and red alder (Alnus rubra Bong.) were extensively investigated. A jet-black mycorrhiza was found to be dominant on Douglas-fir rootlets. The fungal symbiont was identified as Cenococcum graniforme (Sow.) Ferd. and Winge. Two forms of mycorrhizae predominated on root systems of...
Resource Type:: Dissertation
Full Text:: fungi were predominantly members of the genus Penicillium, which also were abundant, together with

A leaf spot diseases of English holly caused by an undescribed species of Sclerophoma

Creator:: Brown, William M., 1935-
Abstract:: English holly culture in Oregon has been threatened by the development of red leaf spots which prevent sale of cut holly. Chemical, mechanical and insect injury and boron deficiency have been shown in the past to cause different types of red leaf spotting, but the cause of holly scab, a...
Resource Type:: Dissertation
Full Text:: DEVELOPMENT 39 THE ASSOCIATION OF FUNGI WITH HOLLY SCAB 46 Inoculations 47 Histological Observations of

Effect of ultraviolet and visible radiation on the sporulation of species of Helminthosporium

Creator:: Yadav, Babu Singh
Resource Type:: Dissertation
Full Text:: Light on Pigment Production . . . 11 MATERIALS AND METHODS . . . . . . . . . . . . . 13 Fungi

Studies on the organic acid metabolism of wheat smut fungus (Tilletia contraversa)

Creator:: Vaisey, Edgar Byron
Resource Type:: Dissertation
Full Text:: that fungi form oxalate through dehydrogenation of 2 moles of formic acid (16, p. 345-346

Fungi associated with Oregon grown clover seed

Creator:: Leach, Charles Morley
Resource Type:: Dissertation
Full Text:: Fungi associated with Oregon grown clover seed FUNGI

The effect of soil moisture and temperature on survival of Verticillium microsclerotia

Creator:: Nadakavukaren, Mathew Joseph
Resource Type:: Dissertation
Full Text:: soil fungi V. albo-atrum can be classified as a root-inhabiting fun gus without the ability to grow

Disease cycle and control of peppermint rust caused by Puccinia menthae Pers

Creator:: Horner, C. E. (Chester Ellsworth), 1925-
Resource Type:: Dissertation
Full Text:: the above fungi to peppermint has been established by wound inoculation and subsequent reisola

Evaluation of fungal amylases for saccharifying fermentation mashes

Creator:: Cormack, James Frederick
Resource Type:: Dissertation

Pathogenic causes of premature decline and death of alsike clover, Trifolium hybridum L., in central Oregon

Creator:: Corden, Malcolm Ernest
Resource Type:: Dissertation
Full Text:: Fungi Isolated from Diseased Plants . . . . . 42 Unidentified Pathogenic Fungi . . . . . . . . 61

Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation

Creator:: Dobie, Norman Dale
Resource Type:: Dissertation
Full Text:: commercial storage s s a a s 12 fungi.... 12 he s I 5 5 12 s s s a s s 13 I s S S S S 15 houses

Systematic, genomic, and transcriptomic analysis of mycoparasitic Tolypocladium species and their Elaphomyces hosts

Creator:: Quandt, C. Alisha
Abstract:: Fungi in the genus Tolypocladium are diverse in their host associations, but the predominant ecologies include parasites of the ectomycorrhizal genus Elaphomyces and pathogens of insects. The aim of this dissertation research is to examine the evolution of these fungi and their host associations. To accomplish this several lines of...
Resource Type:: Dissertation
Full Text:: :________________________________________________________ Joseph W. Spatafora Fungi in the genus Tolypocladium are diverse in their host

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