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    A Phylogenetic Hypothesis on the Evolution and Interactions of Xenorhabdus Spp. (Gamma-Proteobacteria) and Their Steinernema Hosts (Nematoda: Steinernematidae)

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    Author
    Lee, Ming-Min
    Issue Date
    2009
    Keywords
    Cophylogeny
    Cospeciation
    Phylogeny
    Steinernema
    Symbiosis
    Xenorhabdus
    Advisor
    Stock, S. Patricia
    Committee Chair
    Stock, S. Patricia
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Nematodes in the genus Steinernema (Nematoda: Steinernematidae) and their associated bacteria Xenorhabdus spp. (Gamma-Proteobacteria) are an emergent model of terrestrial animal-microbe symbiosis. Although interest in this association initially arose out of their potential as biocontrol agents against insect pests (Tanada and Kaya, 1993), this mutualistic partnership is currently viewed more broadly under the umbrella of basic sciences to inform ecology, evolution, biochemistry, molecular, among other disciplines (Burnell and Stock, 2000; Forst and Clarke, 2002).Despite advances in the discovery and field application of this nematode-bacterium partnership, and the growing popularity of this model system, relatively little has been published to uncover the evolutionary facets of their association. This study adds to the body of knowledge regarding nematode-bacteria symbiosis by 1) producing novel, multi-gene phylogenies for Steinernema and Xenorhabdus; 2) proposing a possible scenario for historical association in the form of a cophylogenetic hypothesis; 3) describing a newly discovered Steinernema species from France.
    Type
    text
    Electronic Thesis
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Entomology
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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