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    Mixed arbuscular mycorrhizae from the Triassic of Antarctica

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    Taylor_1996.pdf (4.142Mb)
    Issue Date
    1996-02-05
    Author
    Phipps, Charlie J.
    Taylor, Thomas N.
    Publisher
    Mycological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    Arbuscular mycorrhizae are the most ubiquitous of mycorrhizal fungi, that have formed mutualistic relationships with virtually almost all major groups of vascular plants. Five genera of arbuscular endomycorrhizal fungi are currently delineated, but fossil arbuscular mycorrhizae have been allied with only two, Glomus and Sclerocystis. A Triassic arbuscular mycorrhiza described inhabiting the roots of Antarcticycas was originally allied with Glomus. It is now known to be a mixed colony comprised of fungi attributable to the suborders Glomineae and Gigasporineae of the Glomales, described as two new species. The fossil Gigasporinean mycorrhiza is characterized by irregularly swollen intercellular and intracellular hyphae that are coiled extensively within the cells. Arbuscules have thick trunks and narrow branches. In the Glominean form, hyphal diameter is more uniform, with coiling rarely present. Arbuscules have thin trunks and fine branches. Vesicles may be lateral or terminal. Spores are not present; therefore, the probability of more than one species of each suborder being represented cannot be conclusively demonstrated. This provides the first fossil representative of the Gigasporineae and supports current rDNA estimates of the age of the lineage. Moreover, it is the first reported instance of a mixed colony of arbuscular endomycorrhizae in the fossil record.
    URI
    http://hdl.handle.net/1808/18017
    DOI
    https://doi.org/10.2307/3760964
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    • Ecology & Evolutionary Biology Scholarly Works [1493]
    Citation
    Phipps, Charlie J. & Taylor, Thomas N. "Mixed arbuscular mycorrhizae from the Triassic of Antarctica." Mycologia. (1996) Vol. 88, Issue 5. pp. 707-714. http://www.dx.doi.org/10.2307/3760964.

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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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