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    Fossil Arbuscular Mycorrhizae from the Early Devonian

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    Taylor_1995.pdf (48.22Mb)
    Issue Date
    1995-07-01
    Author
    Taylor, Thomas N.
    Remy, Winfried
    Hass, Hagen
    Kerp, Hans
    Publisher
    Mycological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    The 400 million-year-old Rhynie chert has provided a wealth of information not only of early land plants, but also of the fungi that inhabited this paleoecosystem. In this paper we report the first unequivocal evidence of arbuscules in an endomycorrhizal symbiosis. A new genus, Glomites, is characterized by extraradical, aseptate hyphae with a two-parted wall, and an intraradical, highly branched network of thin-walled hyphae. Hyphal branches produce terminal, elongate-globose multilayered spores that lack a basal septum. Other hyphae penetrate cell walls and form arbuscules. Arbuscules are morphologically identical to those of living arbuscular mycorrhizae (AM) in consisting of a basal trunk and highly dichotomous distal branches that form a bush-like tuft. Arbuscules are confined to a narrow band of specialized thinwalled cells in the outer cortex that continue to be meristematic. Features of the fossil biotroph are compared with those of extant arbuscular mycorrhizae. Although interpretations regarding the evolution of mycorrhizal mutualisms continue to be speculative, the demonstration of arbuscules in the Early Devonian indicates that nutrient transfer is an ancient phenomenon that may have been in existence when plants invaded the land.
    URI
    http://hdl.handle.net/1808/17992
    DOI
    https://doi.org/10.2307/3760776
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    • Ecology & Evolutionary Biology Scholarly Works [1494]
    Citation
    Taylor, Thomas N.; Remy, W.; Hass, H.; Kerp, H. (1995). "Fossil Arbuscular Mycorrhizae from the Early Devonian." Mycologia, 87(4):560-573. http://www.dx.doi.org/10.2307/3760776.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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