Index Catalog // ScholarsArchive@OSU

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

Inoculum potential of vesicular-arbuscular mycorrhizal fungi in two Costa Rican soils with different vegetation covers

Creator:: Fischer, Christine R.
Abstract:: Mycorrhizae are important for plant growth, particularly in nutritionally poor soils. Vesicular-arbuscular mycorrhizae (VAM) are the primary form of mycorrhizae found in tropical plants, and their persistence in the soil as colonizing fungal propagules following deforestation cannot be directly measured. Utilizing the "most probable number" (MPN) method for estimating infective...
Resource Type:: Masters Thesis

Soil quality assessment of Willamette Valley soils and root colonization potential by arbuscular mycorrhizal fungi

Creator:: Allen, Natalie M.
Abstract:: Interest in measuring soil quality continues to increase worldwide in view of demands on land productivity and the necessity to preserve soil resources, yet identification of suitable indicators for soil quality assessment is still evolving. This study adapted 10 biological, physical, and chemical indicators of soil quality identified by the...
Resource Type:: Masters Thesis
Full Text:: Assessment of Willamette Valley Soils and Root Colonization Potential by Arbuscular Mycorrhizal Fungi

Relationship of extra-matrical hyphae of vesicular-arbuscular mycorrhizal fungi to plant growth response

Creator:: Kough, John Lawrence
Abstract:: The colonization of several species of plants by vesicularar-buscular mycorrhizae (VAM) was studied to determine how host, soil, or symbiont factors interacted to enhance growth of the host plant. Seedlings of two species of the Cuppressaceae and two of the Taxodiaceae formed VAM; colonization significantly improved growth. This response to...
Resource Type:: Dissertation
Full Text:: -arbuscular mycorrhizal fungi to plant growth response AN ABSTRACT OF THE THESIS OF John Lawrence Kough for

Amino Acid Uptake in Arbuscular Mycorrhizal Plants

Creator:: Whiteside, Matthew D., Garcia, Maria O., and Treseder, Kathleen K.
Abstract:: We examined the extent to which arbuscular mycorrhizal (AM) fungi root improved the acquisition of simple organic nitrogen (ON) compounds by their host plants. In a greenhouse-based study, we used quantum dots (fluorescent nanoparticles) to assess uptake of each of the 20 proteinaceous amino acids by AM-colonized versus uncolonized plants....
Resource Type:: Article
Full Text:: no competing interests exist. * E-mail: Treseder@uci.edu Introduction Arbuscular mycorrhizal fungi

Rooting of pear hardwood cuttings using VA mycorrhizal fungi, Agrobacterium rhizogenes and rooting hormones

Creator:: Gonzalez-Caldwell, Sandra
Resource Type:: Masters Thesis
Full Text:: al., 1987). Vesicular-arbuscular mycorrhizal (VAM) fungi, so-called because of the structures

The effect of inoculation with VA-Mycorrhizal fungi on growth and freezing tolerance of winter barley (Hordeum vulgare L.)

Creator:: Kolar, Susan C.
Resource Type:: Masters Thesis
Full Text:: barley germplasm. Vesicular-arbuscular mycorrhizal fungi (VAMF) are symbiotic associates of most plant

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:: act as propagules. Root pieces colonized by vesicular-arbuscular (VA) mycorrhizal fungi which

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

Microbial changes and interactions in the rhizosphere of vesicular-arbuscular mycorrhizal plants

Creator:: Meyer, Julie (Julie Rae)
Abstract:: The influence of vesicular-arbuscular mycorrhizae (VAM) on populations of general taxonomic and functional groups of naturally-occurring rhizosphere bacteria and actinomycetes associated with roots of sweet corn (Zea mays var. rugosa) and subterranean clover (Trifolium subterraneum L.) was assayed using selective media. Sporangial production by Phytophthora cinnamomi was also used as...
Resource Type:: Masters Thesis
Full Text:: clover (Trifolium subterraneum L) inoculated with vesicular-arbuscular mycorrhizal fungi (VAM; upper

Drivers of arbuscular mycorrhizal fungal community composition in roots : hosts, neighbors, and environment

Creator:: Phillips, Wendy S.
Abstract:: The vast majority of terrestrial plant species live in symbiosis with arbuscular mycorrhizal fungi (AMF). AMF and plants live in complex networks, with roots of individual plants hosting multiple AMF, and single AMF colonizing multiple plants concurrently. Through the exchange of resources, the two partners of this symbiosis can have...
Resource Type:: Dissertation
Full Text:: majority of terrestrial plant species live in symbiosis with arbuscular mycorrhizal fungi (AMF). AMF and

The effect of four composts on the establishment of vesicular-arbuscular mycorrhizae in soilless media

Creator:: Miller, Michelle L., 1956-
Resource Type:: Masters Thesis
Full Text:: . Inoculation of vesicular-arbuscular mycorrhizal fungi on onion and tomato seeds. New. Zeal. J. Bot. 16:69-71

Mycorrhizal status of post-fire Pezizales

Creator:: Fujimura, Kei E.
Abstract:: Post-fire Pezizales often fruit seasonally approximately six weeks after a fire in successional groups over the course of two years. Two methods, pure culture synthesis and PCR-based identification, were used to determine if some of these species were mycorrhizal. Eleven fungal isolates, Anthracobia melaloma, Gyromitra infula, Helvella compressa, Morchella sp.,...
Resource Type:: Masters Thesis
Full Text:: the mycorrhizal status of the post-fire Pezizales examined. Fungi that are probably not mycorrhizal

Response of Striga-susceptible and Striga-resistant sorghum genotypes to soil phosphorus and colonization by an arbuscular mycorrhizal fungus

Creator:: Leytem, Alicia B.
Abstract:: Striga, a genus of obligate parasitic weeds in the family Orobanchaceae, has been identified as the most important biological factor limiting agricultural productivity in sub-Saharan Africa. Germination of Striga seeds is triggered by strigolactone root exudates from host plants. Strigolactones also induce hyphal branching in arbuscular mycorrhizal (AM) fungi, which...
Resource Type:: Masters Thesis
Full Text:: hyphal branching in arbuscular mycorrhizal (AM) fungi, which are important for plant uptake of

Below ground biology of Botrychium pumicola (Ophioglossaceae)

Creator:: Camacho, Francisco J.
Resource Type:: Dissertation
Full Text:: a root segment. Arbuscular mycorrhizal-like Redacted for Privacy Below Ground Biology of

Seasonal Dynamics of Roots, Mycorrhizal Fungi and the Mineral Nutrition of Pinot noir

Creator:: Schreiner, R. Paul
Abstract:: The spatial and temporal development of grapevine root systems and associated mycorrhizal fungi was studied over the 1999 &2000 growing seasons in a 20-year-old block of Pinot noir vines at Woodhall Research Vineyard. We determined the root length density of woody roots and fine roots deemed to be physiologically active...
Resource Type:: Technical Report
Full Text:: . Colonization of fine roots by vesicular arbuscular mycorrhizal (VAM) fungi was consistently high in the vine

Mycorrhizal Fungi on the Sagebrush Steppe: Benefits for Restoring Keystone Rangeland Plant Species

Creator:: Prado-Tarango, David E.
Abstract:: Arbuscular mycorrhizal fungi (AMF) are plant symbionts that associate with the vast majority of terrestrial plants species. The AMF colonizes the plant roots by penetrating the root cortical cells, where the fungi exchanges mineral nutrients with the host plant for photosynthates. This association exists as a complex system in which...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Ricardo Mata-González Arbuscular mycorrhizal fungi (AMF) are plant symbionts that

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

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:: . Lupines tend to be colonized by vesicular-arbuscular mycorrhizal (VAM) fungi to a lesser degree than

Taxomony and mycorrhizal ecology of the desert truffles in the genus Terfezia

Creator:: Alsheikh, Abdulmagid M.
Abstract:: Mycorrhizal fungi in arid and semiarid rangelands have received little study in southwest Asia and north Africa, although they are important in food production and rangeland productivity. The desert truffles of the genera Terfezia and Tirmania form fruiting-bodies and mycorrhizae with rangeland plants. This thesis treats the taxonomy and the...
Resource Type:: Dissertation
Full Text:: . Utilization of vesicular-arbuscular mycorrhizal fungi in agriculture. Can. J. Bot. 61:1015-1024. Menge, J

Studies on the vesicular-arbuscular mycorrhizae of Easter lily in the Pacific Northwest

Creator:: Ames, Robert Norman
Abstract:: A study was conducted to characterize the vesicular-arbuscular (VA) mycorrhizal fungi of commercially grown Easter lily. Monthly field soil and root samples were collected from March through September, 1975, from five fields in the coastal area of southern Oregon and northern California. Soil sievings were inoculated onto clover, onion and...
Resource Type:: Masters Thesis
Full Text:: to characterize the vesicular-arbuscular (VA) mycorrhizal fungi of commercially grown Easter lily

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:: forms of perturbation. In the first chapter, we studied fruiting responses of mycorrhizal fungi to

Carbon Sequestration Potential After Riparian Restoration—A Baseline Study of Carbon Stocks and Mycorrhizal Communities

Creator:: DiGioia, Guenevere E. P.
Abstract:: Increased atmospheric carbon emissions of carbon monoxide, carbon dioxide, and methane acerbate climate change through carbon cycle disruption. Riparian areas offer substantial ecosystem services such as water filtration, slowing and cooling, and as is being discovered, a significant carbon sink. Total percent carbon and carbon stocks in restored riparian areas...
Resource Type:: Masters Thesis
Full Text:: other nutrients (N, P, and K) plateaued at year 14. Mycorrhizal fungi species proportions were

Interactions between western hemlock mycorrhizal fungi and wood rotting fungi in a system simulating Douglas-fir nurse logs in Pacific Northwest forests

Creator:: Tuininga, Amy R.
Abstract:: Decomposing logs in Douglas-fir - western hemlock forests in the Pacific Northwest are systems in which many organisms interact. Fungi in these systems include both mycorrhizal fungi associated with hemlock seedlings and many species of saprotrophic wood decomposer fungi. It is very likely that these two groups of fungi interact...
Resource Type:: Masters Thesis

Impact of Nitrogen Use in Grapevines: Vine Physiology, Fruit Quality, and Mycorrhizal Symbiosis

Creator:: Tian, Tian
Abstract:: Nitrogen (N) is the most important nutrient to manage in the overall wine production system, since N has a large influence on vine productivity and fruit quality in the vineyard and also on fermentation kinetics and fermentation-derived aromas in the winery. Previous studies investigated the influence of either vineyard N...
Resource Type:: Dissertation

The Endogonaceae in the Pacific Northwest

Creator:: Gerdemann, J. W. and Trappe, James M.
Resource Type:: Other
Full Text:: lactophenol alone. Presumptive mycorrhizal associations were hypothesized either from the fungi that

Selection of planting stock, inoculation with mycorrhizal fungi, and use of direct seeding

Creator:: Owston, Peyton W., Walters, Gerald A, and Molina, Randy
Abstract:: Keywords: Planting stock selection, Direct seeding, Mycorrhizal fungi
Resource Type:: Part of Book
Full Text:: Selection of PlantingStock, Inoculation with Mycorrhizal Fungi, and Use of Direct Seeding Selection of

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

The mycorrhizal associations of western hemlock

Creator:: Kropp, Bradley Ray
Abstract:: Two objectives of this research were to identify fungi which are mycorrhizal with western hemlock and to examine the ecology of hemlock mycorrhizal fungi indigenous to outplanting sites. Another objective was to evaluate the effectiveness of mycorrhizal inoculation in improving the performance of outplanted hemlock seedlings. A list of over...
Resource Type:: Dissertation
Full Text:: mycorrhizal with western hemlock and to examine the ecology of hemlock mycorrhizal fungi indigenous to

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Creator:: Black, C. H. (Charles H.)
Resource Type:: Dissertation
Full Text:: that vesicular-arbuscular mycorrhizal colonization of Citrus 5 aurantium seedlings increased

The effects of ozone on the growth, rhizosphere population dynamics, and mycorrhizal colonization of wheat

Creator:: Kimball, Shannon M.
Resource Type:: Masters Thesis
Full Text:: harvest, but this difference was not observed at the second harvest. Vesicular-arbuscular mycorrhizal

An Investigation of soil, vegetation and mycorrhizal characteristics associated with native grass re-esablishment in crested wheatgrass seedings

Creator:: Raven, Karen A.
Abstract:: Since the 1930's, many fields on the Crooked River National grasslands have been seeded to crested wheatgrass (Agropyron desertorum). While some of these fields remain dominated by crested wheatgrass others had a greater presence of deep rooted native perennial grasses such as bluebunch wheatgrass (Pseudoroegneria spicata). Twenty eight fields previously...
Resource Type:: Masters Thesis
Full Text:: are classified based on their structure and physiology. Arbuscular mycorrhizal fungi are most

Development of vesicular-arbuscular mycorrhizae and pink root (Pyrenochaeta terrestris) in commercial onion fields in relation to nutrition, pH, and soil fumigation

Creator:: McGraw, Anne-Cressey
Resource Type:: Masters Thesis
Full Text:: , PH, AND SOIL FUMIGATION INTRODUCTION Vesicular-arbuscular (VA) mycorrhizal fungi are beneficial

In search of ecological advantages : Mycorrhizal facilitation of big huckleberry Vaccinium membranaceum (Doug.)

Creator:: Stocking, Peter
Abstract:: Temperate evergreen forests of the Pacific Northwest support big huckleberries (Vaccinium membranaceum) despite their nutrient impoverished soils. Acquisition of nitrogen and phosphorous are the major nutrients limiting V. membranaceum. The plant’s access to these resources is linked to their mycorrhizal symbiosis. To learn more about the symbionts of eriaceous plants...
Resource Type:: Undergraduate Thesis
Full Text:: vary from saprotrophic to facultative or obligate pathogenic fungi to mycorrhizal fungi (Jumponnen and

Effects of inoculations with pathogenic and beneficial microorganisms and ammonium of nitrate fertilization on Easter lily growth

Creator:: Valenciano Mora, Jose Roberto
Abstract:: Although chemical fungicides are commonly used to control fungal soil-borne diseases of Easter lilies, Lilium longiflorum Thunb., in field production and greenhouse forcing, cultural and biological controls may be alternatives or complementary to chemicals for control of pathogens. The influence of inoculations with beneficial, symbiotic, and biocontrol microorganisms to enhance...
Resource Type:: Masters Thesis
Full Text:: referred to as vesicular- arbuscular (VA) mycorrhizal fungi (Linderman, 1978). This type of mycorrhizae

Bioprospecting the Chemical Diversity of Plant-associated Fungi

Creator:: González-Montiel, Gisela Abigail
Abstract:: Fungi have long been used for discovery of new chemical scaffolds. In the clinical setting, the fungal natural products penicillin, statins, and cyclosporine have revolutionized medicine to treat diseases and infections. In the environment, fungal natural products have been used as herbicides, fungicides, and insecticides to protect crops, livestock, and...
Resource Type:: Masters Thesis
Full Text:: : Bioprospecting the Chemical Diversity of Plant-associated Fungi Abstract approved

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

A closed root environment for plant production

Creator:: Blackburn, Bryan (Bryan Keith), 1955-
Abstract:: Thesis research focused on: 1) Water and fertilizer gradients within the plant root zone, and effects of chemical and physical gradients on Trichoderma harzianum populations. 2) Regulation of root growth physically with permeable fabric containers and chemically with copper compounds. 3) Effects of copper coatings for fabric containers on Glomus...
Resource Type:: Masters Thesis
Full Text:: containers on Glomus intraradix vesicular-arbuscular mycorrhizal fungus and plant growth. Notable

Effects of Preinoculation with VAM fungi isolated from different sites on plant tolerance to salinity in soils amended with sodium chloride

Creator:: Cantrell, Isabella Cardona
Abstract:: The hypothesis that inoculation of transplants with vesicular-arbuscular mycorrhizal (VAM) fungi before planting into saline soils would alleviate salt effects on growth and productivity was tested on lettuce (Lactuca sativa L.) and onion (Allium cepa L.). A secondary hypothesis was that the fungi isolated from a saline soil would be...
Resource Type:: Masters Thesis
Full Text:: ? ...................................................................... 3 Vesicular-arbuscular mycorrhizal (VAM) fungi

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:: of mycorrhizal rootlets, but the numbers of fungi were lower than for nonmycorrhizal rootlets

Factors affecting the inoculum potential of VA and ectomycorrhizal fungi in forest soils of southwest Oregon and northern California

Creator:: Parke, Jennifer Lee
Resource Type:: Dissertation
Full Text:: -Mycorrhizal Fungi in Forest Soils of Southwest Oregon and Northern California AN ABSTRACT OF THE THESIS OF

Enhanced rooting of Arctostaphylos uva-ursi 'Oregon Hybrid' with ectomycorrhizal fungi

Creator:: Call, Christopher Alan
Resource Type:: Masters Thesis
Full Text:: volume were used to eval- uate fungal enhancement of rooting. Inoculation with mycorrhizal fungi was

Fungal-small mammal interrelationships with emphasis on Oregon coniferous forests

Creator:: Maser, Chris, Trappe, James M., and Nussbaum, Ronald A.
Abstract:: Most higher plants have evolved with an obligatory symbiotic relationship with my corrhizal fungi. Epigeous mycorrhiza formers have their spores dispersed by air currents, but hypogeous mycorrhizal fungi are dependent upon small mammals as primary vectors of spore dissemination. Mammalian mycophagists defecate within the coniferous forest ecosystem, spreading the viable...
Resource Type:: Article

Spatial relationships of vesicular-arbuscular mycorrhizae, soil fauna and soil nutrients in the juniper-sagebrush-grass communities of central Oregon

Creator:: Roberts, Christine, 1952-
Abstract:: A Study conducted at The Island, Lake Billy Chinook, in Central Oregon, examined differences in the pattern of soil properties between a sagebrush-grass and a juniper-sagebrush-grass community. Juniper invasion is linked with the desertification process in which the sagebrush shrubs and perennial grasses decline. Patterns in soil nutrients and other...
Resource Type:: Masters Thesis

Characterization of Fungal Communities in Selected Wood Species by Field Exposure Tests

Creator:: Torres-Andrade, Paola A.
Abstract:: Fungi are the primary biological agents of wood deterioration and cause major economic losses of wood products globally. Wood in outdoor applications tends to remain wet for extended time periods, making it susceptible to fungal attack. Understanding the factors involved in fungal colonization of wood is important for developing improved...
Resource Type:: Dissertation
Full Text:: Fungi are the primary biological agents of wood deterioration and cause major economic losses of wood

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

The role of ectomycorrhizal fungi in ecosystem recovery

Creator:: Amaranthus, Michael P.
Abstract:: The effect of the abundance and rapidity of ectomycorrhiza and root tip formation on conifer seedling survival and growth was investigated on disturbed forest sites in southwest Oregon and northern California. Experiments were conducted over a range of community types and environmental conditions. A range of sources of transfer soil...
Resource Type:: Dissertation

Mycorrhizae : a hidden benefactor to forest trees

Creator:: Oregon State University. Extension Service, DeYoe, David R., and Cromack, Kermit Jr
Abstract:: Published June 1983. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: , symbiotic interaction between the roots and the mycorrhizal fungi provides food for the fungi by means of

Revegetation of disturbed semiarid grassland in Canyonlands National Park

Creator:: Goldberg, Susan B.
Abstract:: A grassland restoration project was conducted in Canyonlands National Park on an area recently disturbed due to construction. Two native grasses (Oryzopsis hymenoides and Stipa comata) were seeded with 18 different soil treatments. Stipa density and relative mycorrhizal colonization were measured. None of the soil treatments resulted in significantly greater...
Resource Type:: Masters Thesis

Enzyme activity and phytohormone production of ectomycorrhizal fungi

Creator:: Ho, Iwan
Abstract:: The several thousand fungi known to form ectomycorrhizae have co-evolved with their host plants and have developed impressive physiological and ecological diversity. Exploration of some relationships of enzyme activities and phytohormone production of selected ectomycorrhizal fungi to distribution and tree hosts is reported in this thesis. The data have particular...
Resource Type:: Dissertation

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:: most terrestrial species of higher fungi in forests are mycorrhizal and thus are root inhabitants that

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:: ) produced through photosynthesis belowground. Many of these roots are associated with mycorrhizal fungi

Effect of phosphorus forms and fertilizer rates on mycorrhizal development on containerized seedlings

Creator:: Munson, Kenneth Richard
Resource Type:: Masters Thesis
Full Text:: inoculum of one of three mycorrhizal fungi (Hebeloma crustuliniforme, Laccaria laccata and Cenococcum

Arbutus menziesii (Ericaceae) facilitates regeneration dynamics in mixed evergreen forests by promoting mycorrhizal fungal diversity and host connectivity

Creator:: Kennedy, Peter G., Smith, Dylan P., Horton, Tom R., and Molina, Randy J.
Abstract:: • Premise of study: In the mixed evergreen forests in the western United States, Arbutus menziesii is able to quickly resprout following disturbance and, as such, act as a nurse tree during forest regeneration. The mechanism for this nurse tree effect has frequently been ascribed to mycorrhizal fungi, but no...
Resource Type:: Article
Full Text:: mechanism for this nurse tree effect has frequently been ascribed to mycorrhizal fungi, but no detailed

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:: defined by the mycorrhizal structures: the ectomycorrhizal (EcM) fungi and the arbuscular (AM

Root symbionts and soil microorganisms associated with actinorrhizal plants

Creator:: Rose, Sharon Lee
Abstract:: Symbiotic associations are established between non-leguminous (actinorrhizal) nitrogen-fixing flowering plants and two categories of microorganisms: mycorrhizal fungi and a filamentous actinomycete. The actinomydete induces nodule formation and produces nitrogenase, the enzyme responsible for the reduction of atmospheric nitrogen to a form available to higher plants. The mycorrhizal fungus is found...
Resource Type:: Dissertation
Full Text:: . Soil sieving revealed species of the following genera of vesicular-arbuscular (VA) mycorrhizal fungi

Tuberales of North America

Creator:: Gilkey, Helen M., 1886-1972
Resource Type:: Book
Full Text:: known. Outstanding con- tributions to an understanding of the phylogeny of the hypogaeous fungi, how

The role of small mammals as dispersers of mycorrhizal fungal spores within variously managed forests and clearcuts

Creator:: McIntire, Patrick W.
Abstract:: Small-mammal community composition, microhabitat selection, and dispersal of mycorrhizal fungal spores were studied in southwestern Oregon. Sampled habitats exhibited structural variation resulting from silvicultural practices. In 1981, the effect of clearcut treatment on these phenomena was evaluated. In 1982, the effect of forest structure was studied. Discriminant function analysis (DFA)...
Resource Type:: Dissertation
Full Text:: ecological interrelationships between small mammals (Delany 1974), mycorrhizal fungi, and coniferous forests

Sequestrate fungi of New Zealand: Elaphomyces (Ascomycota, Eurotiales, Elaphomycetaceae)

Creator:: Castellano, Michael A., Beever, Ross E., and Trappe, James M.
Abstract:: Four species of the sequestrate fungal genus Elaphomyces are reported from New Zealand: Elaphomyces bollardii sp. nov. associated with Leptospermum spp. and Kunzea ericoides, E. luteicrustus sp. nov. associated with Nothofagus menziesii, E. putridus sp. nov. associated with Nothofagus spp., and an unnamed species associated with Nothofagus spp.
Resource Type:: Article
Full Text:: Sequestrate fungi of New Zealand: Elaphomyces (Ascomycota

Spatial Distribution of Plant-Parasitic Nematodes in Semi-Arid Vitis vinifera Vineyards in Washington

Creator:: Howland, Amanda D., Schreiner, R. Paul, and Zasada, Inga A.
Abstract:: The most commonly encountered plant-parasitic nematodes in eastern Washington Vitis vinifera vineyards are Meloidogyne hapla, Mesocriconema xenoplax, Pratylenchus spp., Xiphinema americanum, and Paratylenchus sp.; however, little is known about their distribution in the soil profile. The vertical and horizontal spatial distribution of plant-parasitic nematodes was determined in two Washington V....
Resource Type:: Article
Full Text:: semi-arid vineyards. Key words: arbuscular mycorrhizal fungi colonization, management, plant-parasitic

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

Drivers of Soil Fungal Communities Across Three Tropical Rainforests in Panama

Creator:: Schappe, Tyler
Abstract:: Fungi play critical roles in ecosystem processes and interact with plant communities in mutualistic, pathogenic, and commensal ways. Fungal communities are thought to be influenced by both associated tree communities and soil properties. However, the relative importance of the biotic and abiotic drivers of soil fungal community structure and diversity...
Resource Type:: Masters Thesis
Full Text:: ecological function. Arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) fungi are two guilds that form

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:: EcM species, and Western redcedar (Thuja plicata), a host for arbuscular mycorrhizal fungi, which do

Occurrence of ectomycorrhizae on ericaceous and coniferous seedlings grown in soils from the Oregon Coast Range

Creator:: Smith, Jane E. (Jane Elizabeth)
Abstract:: Seedlings of Gaultheria shallon, Pseudotsuga menziesii, Rhododendron macrophyllum and Tsuga heterophylla were grown together in the greenhouse in soils from three young managed Douglas-fir forests in the Oregon Coast Range. The main objectives were 1 )to evaluate the ability of ericaceous plants and overstory conifers to share compatible mycorrhizal fungi...
Resource Type:: Masters Thesis

FraherThesis final.pdf

Creator:: Fraher, Simon
Abstract:: Soil solarization has been used throughout the world, but its effect on plant growth variables in ornamental tree saplings in the Willamette Valley are not well documented. Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. This study...
Full Text:: emphasis on enhancing plant-soil interactions using mycorrhizal fungi. Arbuscular mycorrhizal fungi (AMF

FraherFINAL BRR Presentation.pdf

Creator:: Fraher, Simon
Abstract:: Soil solarization has been used throughout the world, but its effect on plant growth variables in ornamental tree saplings in the Willamette Valley are not well documented. Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. This study...
Full Text:: Many fungi are beneficial  Ectomycorrhizae  Endomycorrhizae  Arbuscular mycorrhizal fungi (AMF

Fungal endophyte diversity in foliage of native and cultivated Rhododendron species determined by culturing, ITS sequencing, and pyrosequencing

Creator:: Raizen, Nathaniel L.
Abstract:: Western Oregon is home to native Rhododendron species and is the center for cultivated Rhododendron production in the United States. These Rhododendron spp. are known to be infected with fungal endophytes. However, the community structure of these endophytes in native and cultivated Rhododendron is poorly understood. Our study targeted the...
Resource Type:: Masters Thesis
Full Text:: , Schüssler A. 2010. DNA barcoding of arbuscular mycorrhizal fungi. New Phytol. 187:461–474. 40

Apple mycorrhizae and their effects on growth and nutrient concentration in apple seedlings grown in two soils with varied levels of P

Creator:: Geddeda, Yosef Ibrahim
Abstract:: A study was conducted to characterize the vesicular-arbuscular (VA) fungi of apples grown in Oregon. Using roots and soil from apple orchards as inoculae, six different fungal species were found in pot cultures: Gigaspora margarita Becker and Hall, Glomus fasciculatum (Thaxter sensu Gerdemann) Gerd. and Trappe, Glomus mosseae (Nicol. and...
Resource Type:: Dissertation
Full Text:: and Development Vesicular-arbuscular (VA) mycorrhizal fungi are common to most soils of the

The influence of mycorrhizae on the mineral nutrient content of strawberries and red raspberries

Creator:: Hughes, Megan
Abstract:: The influence of mycorrhizae on the nutrient uptake of strawberries and red raspberries was investigated. On red raspberries innoculation with a mycorrhizal fungus resulted in increased P uptake and a greater concentration of P in the shoots of the plants. The strawberries were innoculated with 2 species of mycorrhizal fungus....
Resource Type:: Masters Thesis
Full Text:: lower shoot concentration of P and N. While mycorrhizal fungi have been found to produce growth

Spalting Fungi : Genetic Identification, Material Interactions and Microscopical Characteristics of Extracted Pigments

Creator:: Vega Gutiérrez, Sarath Mercedes
Abstract:: Spalting fungi show strong potential as natural colorants on a variety of materials, specifically textiles and wood. Four species of spalting fungi are currently utilized in this manner: Scytalidium cuboideum, which produces a red pigment called draconin red, Scytalidium ganodermophthorum, that produces an unknown yellow pigment, and Chlorociboria aeruginosa and...
Resource Type:: Dissertation
Full Text:: Title: Spalting Fungi: Genetic Identification, Material Interactions and Microscopical Characteristics

FraherSimonP2017.pdf

Creator:: Fraher, Simon
Abstract:: Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. Biomass, shoot length, and AMF colonization were examined in red oak (Quercus rubra), Mazzard cherry (Prunus avium), and hawthorn (Crataegus monogyna) at J. Frank Schmidt & Son Co. nursery...
Full Text:: Key Words: Soil solarization, arbuscular mycorrhizal fungi, Willamette Valley, ornamental nursery

FINAL BRR Presentation.pptx

Creator:: Fraher, Simon
Abstract:: Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. Biomass, shoot length, and AMF colonization were examined in red oak (Quercus rubra), Mazzard cherry (Prunus avium), and hawthorn (Crataegus monogyna) at J. Frank Schmidt & Son Co. nursery...
Full Text:: fluctuations Clara Weidman, 2015 Many fungi are beneficial Ectomycorrhizae Endomycorrhizae Arbuscular

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

Fungi in the diets of northern flying squirrels and lodgepole chipmunks in the Sierra Nevada

Creator:: Meyer, Marc D., North, Malcolm P., and Kelt, Douglas A.
Abstract:: The diets of a fungal specialist, northern flying squirrel (Glaucomys sabrinus (Shaw, 1801)), and a dietary generalist, lodgepole chipmunk (Neotamias speciosus (Merriam, 1890)), were examined in the old-growth, mixed-conifer forest at the Teakettle Experimental Forest in California’s southern Sierra Nevada. Spores of fungi were identified from fecal pellets collected from...
Resource Type:: Article
Full Text:: (Maser et al. 1978; John- son 1996). Forest trees depend on mycorrhizal fungi for effi- cient nutrient

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

Effects of lime and VA-Mycorrhiza interactions on growth responses of sweetgum seedlings

Creator:: Davis, Elizabeth Anne
Abstract:: A study, consisting of two sequential greenhouse experiments, was designed to determine the effects of soil liming upon the fungal partner in a mycorrhizal association. A Willamette Valley foothill soil, of the Jory series, was limed in increments to achieve a range of acidity and alkalinity. The P-deficiency and P-fixing...
Resource Type:: Masters Thesis
Full Text:: ) provided stressed conditions favoring mycorrhizal benefit. Two vesicular-arbuscular mycorrhizal (VAM

Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

Creator:: Gonen, Lilah
Abstract:: Pseudotsuga menziesii var. menziesii (coast Douglas-fir) is a tree of ecological, economic, and cultural value in its native North American Pacific Northwest (PNW) distribution. P. menziesii is host to a variety of well-documented endophytic foliar microorganisms, including the fungus Nothophaeocryptopus gaeumannii, the causal agent of Swiss needle cast (SNC), and...
Resource Type:: Masters Thesis
Full Text:: : Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

Diverse Lifestyles and Strategies of Plant Pathogenesis Encoded in the Genomes of Eighteen Dothideomycetes Fungi

Creator:: Ohm, Robin A., Feau, Nicolas, Henrissat, Bernard, Schoch, Conrad L., Horwitz, Benjamin A., Barry, Kerrie W., Condon, Bradford J., Copeland, Alex C., Dhillon, Braham, Glaser, Fabian, Hesse, Cedar N., Kosti, Idit, LaButti, Kurt, Lindquist, Erika A., Lucas, Susan, Salamov, Asaf A., Bradshaw, Rosie E., Ciuffetti, Lynda, Hamelin, Richard C., Kema, Gert H. J., Lawrence, Christopher, Scott, James A., Spatafora, Joseph W., Turgeon, B. Gillian, de Wit, Pierre J. G. M., Zhong, Shaobin, Goodwin, Stephen B., and Grigoriev, Igor V.
Abstract:: Correction 5 Mar 2013: Ohm RA, Feau N, Henrissat B, Schoch CL, Horwitz BA, et al. (2013) Correction: Diverse Lifestyles and Strategies of Plant Pathogenesis Encoded in the Genomes of Eighteen Dothideomycetes Fungi. PLOS Pathogens 9(3): 10.1371/annotation/fcca88ac-d684-46e0-a483-62af67e777bd
Resource Type:: Article
Full Text:: Pathogenesis Encoded in the Genomes of Eighteen Dothideomycetes Fungi Robin A. Ohm1*, Nicolas Feau2, Bernard

Mycological Maintenance of Rangelands and the Impacts of a Thatch Forming Invasive Annual Grass (Taeniatherum caput-medusae)

Creator:: Hovland, Matthew
Abstract:: Arbuscular mycorrhizal fungi (AMF) may exert profound influences on ecosystem resilience and invasion resistance in western North American sagebrush steppe and other arid rangeland plant communities. Maintenance of plant community structure through ecological feedbacks such as facilitation of nutrient cycling and uptake by host plants, physical and chemical contributions to...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Ricardo Mata-Gonzalez Arbuscular mycorrhizal fungi (AMF) may exert profound

The development and decline dynamics of two ectomycorrhizal fungal mat soil microbial communities in response to a reciprocal soil transfer experiment in old-growth Douglas-fir forests

Creator:: Cappellazzi, Jed E.
Abstract:: Ectomycorrhizal fungi (EmF) form symbioses with trees. These symbioses profoundly influence forest ecology. Certain EmF form specialized profusions of hyphae, known as ectomycorrhizal fungal mats (mats) which are visible to the naked eye, alter forest soil biogeochemistry, substantially contribute to soil microbial biomass/respiration and support unique microbial communities. Piloderma and...
Resource Type:: Masters Thesis
Full Text:: fungi (EmF), arbuscular mycorrhizal fungi (AmF), ericoid mycorrhizal fungi (ErM) and orchid

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:: fungi associated with ponderosa pine, particularly the co-evolved mycorrhizal fungi (Pirozynski and

Within-population genetic structure differs between two sympatric sister-species of ectomycorrhizal fungi, Rhizopogon vinicolor and R. vesiculosus

Creator:: Dunham, Susie M., Mujic, Alija Bajro, Spatafora, Joseph W., and Kretzer, Annette M.
Abstract:: Using spatial autocorrelation analysis, we examined the within-population genetic structure of Rhizopogon vinicolor and R. vesiculosus, two hypogeous ectomycorrhizal (EM) species that are sympatric sister taxa known to differ in their clonal structure. We collected 121 sporocarps and 482 tuberculate EM of both species from a 20 ha forest stand...
Resource Type:: Article
Full Text:: sympatric sister-species of ectomycorrhizal fungi, Rhizopogon vinicolor and R. vesiculosus Susie M. Dunham1

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

Cesium radioisotope content of wild edible fungi, mineral soil, and surface litter in western North America after the Fukushima nuclear accident

Creator:: Trappe, Matthew J., Minc, Leah D., Kittredge, Kimberly S., and Pink, Jeremias W.
Abstract:: We measured activity levels of cesium radioisotopes ¹³⁴Cs and ¹³⁷Cs in wild edible fungi, mineral soil, and surface litter of the west coast of North America from southern California to northern Vancouver Island after the Fukushima nuclear accident. All activity measurements were below governmental limits for human health. ¹³⁷Cs activity...
Resource Type:: Article
Full Text:: bioaccumulation is their 56 trophic status (Gillett and Crout 2000). Mycorrhizal fungi form symbioses with

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:: with cheatgrass-promoted fire (Hilty et al. 2004), arbuscular mycorrhizal fungi species richness can

Soil solarization effects on plant growth variables of field-grown tree saplings

Creator:: Fraher, Simon
Abstract:: Soil solarization has been used throughout the world, but its effect on plant growth variables in ornamental tree saplings in the Willamette Valley are not well documented. Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. This study...
Resource Type:: Honors College Thesis

Spatial structure and richness of ectomycorrhizal fungi colonizing bioassay seedlings from resistan propagules in a Sierra Nevada forest: comparisons using two hosts that exhibit different seedling establishment patterns

Creator:: Izzo, Antonio, Nguyen, Diem Thi, and Bruns, Thomas D.
Abstract:: In this study we analyzed the spatial structure of ectomycorrhizal fungi present in the soils as resistant propagules (e.g. spores or sclerotia) in a mixed-conifer forest in the Sierra Nevada, California. Soils were collected under old-growth Abies spp. stands across approximately 1 km and bioassayed with seedlings of hosts that...
Resource Type:: Article
Full Text:: Spatial structure and richness of ectomycorrhizal fungi

Water and nutrient competition with cover crops in Willamette Valley vineyards. Final Report Northwest Center for Small Fruits Research 2004-2005 funding

Creator:: Schreiner, R. Paul and Sweet, Rebecca
Abstract:: Objectives: I. To evaluate the effects of five cover crop mixes on grapevine: a) water stress b) nutrient status c) fruit production and quality d) shoot growth e) mycorrhizal colonization. II. To evaluate cover crop mixes for their: a) establishment rate b) biomass production c) nutrient content.
Resource Type:: Technical Report
Full Text:: and CC) and analyzed for fine root length and arbuscular mycorrhizal fungi (AMF) colonization. Fruit

Assessment of potential bioremediation of heavy metals found in treated wood by ectomycorrhizal and wood-decay fungi in pure culture and the bioremoval of fruiting bodies

Creator:: Donnelly, Johanna
Abstract:: Treated wood commodities disposed of in landfills contain chemicals that can migrate into the environment. Wood treatments such as ammoniacal copper zinc arsenate (ACZA) contain heavy metals which prevent the biological degradation of wood. These metals can migrate out of treated wood into soil or groundwater, posing environmental hazards. This...
Resource Type:: Honors College Thesis
Full Text:: ectomycorrhizal fungi showed that a greater number of mycorrhizal cultures, including Hericium species were able

Patterns of ectomycorrhizal host-fungus specificity in the Pacific Northwest

Creator:: Molina, R.
Abstract:: Results from approximately 400 fungus-host pure culture inoculations indicate that specificity of ectomycorrhizal associations is a complex phenomenon and cannot be based solely on field observations of sporocarp-host associations. Of the numerous sporocarp-host specific fungi tested, most formed ectomycorrhizae with one or more unexpected, non-associated hosts. These results conclusively demonstrate...
Resource Type:: Dissertation
Full Text:: Dyrness 1973). Such companion hosts may share specific mycorrhizal fungi. Better understanding of these

Ecological assessment after the addition of genetically engineered Klebsiella planticola SDF20 into soil

Creator:: Holmes, Michael T.
Abstract:: The objectives in this research were to assess whether Klebsiella planticola SDF20 could survive in soil and result in ecological effects to soil foodweb organisms and plant growth. Four experiments were conducted using soil microcosms. Klebsiella planticola SDF20 has been genetically engineered to produce ethanol from agricultural waste for use...
Resource Type:: Dissertation
Full Text:: (Paul and Clark 1989). 23 1.7.3 Vesicular-arbuscular mycorrhizal fungi The earliest known plants

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

The influence of ectomyorrhizae on drought tolerance characteristics of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings

Creator:: Dosskey, Michael G.
Abstract:: Douglas-fir seedlings were inoculated with different species of ectomycorrhizae-forming fungi in order to test the concept that ectomycorrhizae enhance the drought tolerance of seedlings and to investigate the mechanisms responsible for this effect. Seedlings were transplanted at age 6 to 8 weeks into pots containing pasteurized loam soil and inoculated...
Resource Type:: Dissertation
Full Text:: significant degree, fungi which develop certain mycorrhizal types tend to associate with certain taxa of

Examining ectomycorrhizal communities of ponderosa pine and lodgepole pine in the south-central Oregon pumice zone

Creator:: Garcia, Maria Osuna
Abstract:: Background information is presented that provides historical perspectives on the field of mycology in the Pacific Northwest and its role in forest management. The series of events and decisions that have led to previous studies (or lack of studies) in the field also dictate the directions of current research. Culture,...
Resource Type:: Masters Thesis
Full Text:: roots by microscopic fungi, is termed “mycorrhizal symbiosis.” The word “mycorrhiza” is derived from

Ectomycorrhizal populations on a chronosequence of disturbed areas in the central Cascades

Creator:: Meyer, Michele Marie
Abstract:: A greenhouse bioassay was used to investigate effects of natural and manmade disturbances on native ectomycorrhizal populations of Douglas-fir and western hemlock on a steep southeast slope in the west central Cascade Mountains. Total and mycorrhizal root tips were counted on seedlings grown in soils collected from (a) two 100+...
Resource Type:: Masters Thesis

Fuel Treatments of Ponderosa Pine (Pinus ponderosa) in the Blue Mountains of Eastern Oregon : A Mycorrhiza Perspective

Creator:: Hart, Benjamin T. N.
Abstract:: Over the course of the last century, a successful history of fire suppression has contributed to unsuccessful present day control over wildfire. In the absence of fire and the janitorial and ecological services it provides, drier inland forests are shifting in species composition and exceeding densities that cannot survive and...
Resource Type:: Masters Thesis
Full Text:: forest restoration practices on soil biochemistry and the mycorrhizal fungi associated with ponderosa

Effects of pre-sowing soil treatments on root colonization of 1-0 ponderosa and lodgepole pine seedlings by potentially-pathogenic fungi, USDA Forest Service Lucky Peak Nursery, Boise, Idaho

Creator:: James, Robert L., United States. Forest Health Protection, and United States. Forest Service. Northern Region
Abstract:: Healthy-appearing 1-0 ponderosa and lodgepole pine seedlings were assayed for root infection and colonization by potentially-pathogenic fungi following pre-sowing soil treatments which included methyl bromide/chloropicrin (MBC) fumigation, fallowing with or/without periodic cultivation, and amending soil with mushroom composts or undecomposed sawdust. Levels of root colonization by Fusarium spp. on both...
Resource Type:: Technical Report
Full Text:: ON ROOT COLONIZATION OF 1-0 PONDEROSA AND LODGEPOLE PINE SEEDLINGS BY POTENTIALLY-PATHOGENIC FUNGI

Taxonomy of desert truffles : the genera Phaeangium and Tirmania

Creator:: Alsheikh, Abdulmagid M.
Abstract:: Mycorrhizal fungi are important in food production of arid lands. The desert truffles not only form a symbiotic association with range plants but also form fruiting bodies which are both prized as food and nutritious. The taxonomy and ecology of two genera of desert truffles are treated in this thesis....
Resource Type:: Masters Thesis
Full Text:: Phaeangium and Tirmania Abstract approved: Redacted for Privacy 1 Dr. James M. Trappe Mycorrhizal fungi

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Creator:: Fernandes, Marcelo Ferreira
Abstract:: A method based on fatty acid (FA) analysis is used to profile microbial community structure (MCS). Various extraction protocols are available, which alter the types of FAs extracted from soils. The more time consuming but widely used protocol extracts only FAs from phospholipids (PLFA). This technique is desirable because PLFAs...
Resource Type:: Dissertation
Full Text:: extraction method. Another peak, 16:1ω5c, which has been used as an arbuscular mycorrhizal fungi (AMF

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

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