Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 48 for “"Ectomycorrhizal"”.
-
Ecological and taxonomic studies of ectomycorrhizal fungi associated with Aspen
A discrete aspen clone was sampled for ectomycorrhizal sporocarps over 4 years in an area impacted by copper mining in Butte, Montana. Locations of sporocarps were noted and species identified. A majority of the mycorrhizal fungi found in the aspen stand were early colonizers or species …
-
An Experimental Test of Controls on Resource Exchange in an Ectomycorrhizal Mutualism
… between <em>Pinus taeda</em> seedlings and two ectomycorrhizal (EM) fungal species, <em>Rhizopogon roseolus</em> and <em>Pisolithus arhizus</em>. We evaluated how carbon availability to plants (manipulated with high and low light exposure) affected those resource fluxes and ratios over 3 time …
-
Trace metal effects on ectomycorrhizal growth, diversity, and colonization of host seedlings
Ectomycorrhizal fungi are essential to seedling establishment in disturbed sites. This dissertation examines the effects of trace metals and soil disturbance on ectomycorrhizal fungi in the laboratory and the field. The first experiment assessed Cu and Zn impact on growth of three ectomycorrhizal …
-
Diversity of ectomycorrhizal fungi on two reclaimed surface mines differing in soil properties
I analyzed community structure of ectomycorrhizal fungi on white pine (Pinus strobus) on two reclaimed surface mines in eastern Ohio. One site was acidic and metal-stressed, the other was alkaline. Completely different community composition was found on the two sites by PCR/ITS/RFLP analyses of …
-
Succession of ectomycorrhizal fungi associated with Engelmann spruce and subalpine fir in Wyoming
… ascomycetes were collected and identified, and ectomycorrhizal root tips sampled from each plot. Pure cultures of the basidiomycetes were routinely attempted. Mycorrhizal syntheses were subsequently attempted with both tree species using successful pure cultures. Thirty-nine species of higher …
-
The Fungal Connection: Characterizing the Ectomycorrhizal Community and Belowground Response to Restoration Treatments in Northern Mississippi.
Ectomycorrhizal (ECM) fungi are symbionts on the roots of woody plant species throughout the world. These fungi provide plants with nutrients and are important drivers of ecosystem processes. ECM fungi vary in their effect on host plants and host-specificity, making them important considerations in …
-
Ectomycorrhizal Fungal Succession in a Native Monterey Pine Forest and Its Potential Influence Upon Forest Population Dynamics
Ectomycorrhizal fungi are plant symbionts influential to the growth and survival of many plant species found within forest ecosystems throughout the globe. The succession of ectomycorrhizal communities during forest maturation has been observed in a number of systems; however, though it is …
-
Influence of Varying Inorganic Nutrients Supply on Ergosterol and Glucosamine Concentrations and Biomass Nutrient Stoichiometry in Ectomycorrhizal Fungi
<p>Ectomycorrhizal (ECM) fungi are critical for the health of forest ecosystems where they can sequester large amounts of carbon in the form of soil organic matter, a matter of growing interest due to anthropogenic climate change. A clear understanding of their growth dynamics and responses to …
-
Genetic And Temporal Variation In Resource Exchange Between An Ectomycorrhizal Fungus, Rhizopogon Occidentalis, And Seedlings Of Pinus Radiata
… exchange dynamics between Pinus radiata and an ectomycorrhizal fungus, Rhizopogon occidentalis, varied between native populations of Pinus radiata and over the first 64 weeks of the mycorrhizal mutualism. Using a mycocosm approach, the C:N and C:P exchange ratios were determined by comparing the …
-
Linking The Functional Diversity Of Ectomycorrhizal Fungal Species To Soil Carbon And The Genetics Of A Foundational Tree Species
… how carbon storage in soils is influenced by ectomycorrhizal fungi. In this symbiosis, the plant host provides the vast majority of C for fungal growth. As a consequence, ECM fungi may provide one of the major pathways for C from trees to soils. Ectomycorrhizal fungal species produce …
-
Ectomycorrhizal associations in tropical montane forest: insights into their influence on nutrient cycling and functional responses to soil fertility
In Panamanian montane forest, the ectomycorrhizal tree Oreomunnea mexicana forms monodominant stands where it accounts for up to 70% of individuals. Monodominance is unexpected in tropical forest because the accumulation of host-specific pathogens is thought to limit the local abundance of …
-
The systematics and ecology of Boletes with special reference to the Genus Suillus and its ectomycorrhizal relationships in Nepal
… that the six Suillus-Pinus relationships are ectomycorrhizal. The Suillus mycota of western Virginia has 12 known species. Three, of the five which are ectomycorrhizal with Pinus strobus, have closely related counterparts in Nepal. These counterparts are ectomycorrhizal with P. wallichiana, a …
-
Ecological and taxonomic studies of the Russulaceae and other ectomycorrhizal Basidiomycetes in the high-elevation forests of the southern Appalachians
… and<i>Lactarius</i>) are among the dominant ectomycorrhizal fungi in forest communities. The contribution of the Russulaceae to the communities of ectomycorrhizal Basidiomycetes fruiting in red spruce and adjacent northern hardwood forests in West Virginia was evaluated and compared with …
-
Systematics and Ecology of Truffles (Tuber)
… Northern hemisphere forests and form obligate ectomycorrhizal symbiosis with trees within the Pinaceae, Fagaceae, Betulaceae, and Juglandaceae. </p><p>The transition to a truffle form (from an epigeous form) has occurred independently, multiple times in both the Ascomycetes and Basidiomycetes. …
-
Effect of a heavy metal on ecto- and vesicular-arbuscular mycorrhizal fungi: the physiology, ultrastructure, and ecology of copper stress and tolerance
… examines the enzyme tyrosinase in several ectomycorrhizal fungi and shows that its activity is altered in these fungi in response to copper. Polyamines are also examined in this chapter, and it is shown that their levels are altered in some ectomycorrhizal fungi due to copper stress but not …
Page 1 of 3