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    Novel fungal taxa in an Alaskan boreal forest: phylogenetic affinities, ecologies, and ribosomal RNA secondary structures

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    Glass_D_2011.pdf
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    Author
    Glass, Daniel
    Chair
    Taylor, D. Lee
    Committee
    Olson, Link E.
    Takebayashi, Naoki
    Duffy, Lawrence
    Keyword
    fungi
    Alaska
    genetics
    habitat
    mycological surveys
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/11389
    Abstract
    Phylogenetic analyses suggest that a novel DNA sequence (NS1) found in a boreal forest soil-clone library belongs to the fungal kingdom but does not fall unambiguously within any known class. In order to determine if NS1 codes for an authentic ribosomal RNA (rRNA) gene-copy, I modeled ribosomal RNA secondary structure for four gene regions. Such analyses have never been used on environmental ribosomal sequences before. It appears that NS1 does code for an authentic gene-copy and is not a biological or lab artifact. I also elucidated the habitat preferences, horizon preferences, and fine-scale spatial structure of NS1 using molecular methods. I determined that NS1 was associated with spruce and was found in both the organic and mineral soil horizons. It appears to have a clumped distribution on the scale of a few meters and its spatial distribution shows little inter-annual variability. Together these findings suggest that NS1 does represent an authentic gene-copy and also shed light on the ecology of this putative taxon. I hope future efforts will expand our understanding of both its identity and function.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2011
    Table of Contents
    1. Evaluation of the authenticity of a highly novel environmental sequence from boreal forest soil using ribosomal RNA secondary structure modeling -- 2. Habitat preferences, micro-spatial structure, and temporal persistence of a novel fungal taxon in Alaskan boreal forest soils -- Conclusions -- Literature cited -- Appendix.
    Date
    2011-12
    Type
    Thesis
    Collections
    Biological Sciences

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