Index Catalog // ScholarsArchive@OSU

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

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

Creator:: Pilz, David P.
Abstract:: Field and greenhouse bioassays were used to compare the mycorrhizal associations of Douglas-fir seedlings from undisturbed forests, and nonburned and burned portions of clearcuts on three Sites in the west-central Cascades of Oregon. Field soil transfers and greenhouse soil pasteurization and reinoculation were used to investigate soil biology and inoculum...
Resource Type:: Masters Thesis

Basidiospores of Rhizopogon vinicolor and R. colossus as ectomycorrhizal inoculum

Creator:: Castellano, Michael Angelo
Abstract:: Basidiospores of Rhizopogon viriicolor Smith and R. colossus Smith were inoculated onto container-grown Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings and grown under two levels of soluble fertilizer and one level of slow-release fertilizer. Both fungi formed abundant (54%) ectomycorrhizae under the soluble fertilizer regimes. Slow-release fertilizer greatly reduced percent ectomycorrhizae...
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

Association of nitrogen-fixing bacteria with ectomycorrhizae in Douglas-fir

Creator:: Niu, Chih-Hao
Abstract:: Many higher plants have mycorrhizae associated with their roots. These structures are often essential for survival and growth (Harley & Smith 1983). Mycorrhizae are known for the abilities to enhance nutrient absorption. While nitrogen-fixing organisms are found as components of the mycorrhizosphere, mycorrhizal fungi are not presently known to fix...
Resource Type:: Masters Thesis

Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts

Creator:: Borchers, Susan L.
Abstract:: A greenhouse bioassay was used to compare the effects of soils collected at different distances from hardwood species on the growth, mycorrhiza formation, and foliar nutrient concentrations of Douglas-fir seedlings. Soil nutrient concentrations and bulk densities were also determined. Soils were collected from two southwestern Oregon sites that had been...
Resource Type:: Masters Thesis

The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites

Creator:: Volk, John
Abstract:: Miombo woodland and dambo grassland soils were selected to study the effect of soil transfer on early growth of B. petersiana, C. spectabilis, and C. calothyrsus on degraded sites in northern Zambia. The experiment was conducted on previously slash and burned, cultivated, and abandoned sites. Both sterile and unsterile miombo...
Resource Type:: Masters Thesis

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

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

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

ScholarsArchive@OSU

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

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

Basidiospores of Rhizopogon vinicolor and R. colossus as ectomycorrhizal inoculum

Enzyme activity and phytohormone production of ectomycorrhizal fungi

Association of nitrogen-fixing bacteria with ectomycorrhizae in Douglas-fir

Growth and mycorrhiza formation of Douglas-fir seedlings grown in soils collected at different distances from hardwoods pioneering southwest-Oregon clearcuts

The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites

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

Revegetation of disturbed semiarid grassland in Canyonlands National Park

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

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