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    Wood Decay in Silicified Gymnosperms from Antarctica

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    taylor_bg_v147n1p116.pdf (8.922Mb)
    Issue Date
    1986-03-01
    Author
    Stubblefield, Sara P.
    Taylor, Thomas N.
    Publisher
    University of Chicago Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    http://www.jstor.org/stable/2474817
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    Abstract
    Gymnospermous secondary xylem degraded by wood-decaying fungi was examined in silicified fossils from Antarctica. AraucarioxyIon-type wood from the Triassic and specimens of Vertebraria from the Permian demonstrate similar patterns of decay. Specimens are characterized by irregularly shaped areas lacking cells and are infected with branched, septate hyphae with clamp connections. The decay in these fossils is comparable in appearance to present-day rots caused by basidiomycetes. Two patterns of decay are evident: (1) A wall component, presumably lignin, is removed from the wall and middle lamella of infected tracheids, leaving a considerably thinner cellulose framework; and (2) the primary and secondary walls typically separate, and all wall layers are progressively reduced in thickness and eventually removed. The middle lamella, particularly where it is thickest in the corners between cells, persists longer than other layers. Indications of host response to fungal attack include the production of possible wall appositions. Evidence of wood decay occurs as early as the Upper Devonian, and all reported cases from the fossil record are similar to those found today.
    Description
    This is the publisher's version, also available electronically from http://www.jstor.org.
    URI
    http://hdl.handle.net/1808/17994
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1492]
    Citation
    Stubblefield, Sara P.; Taylor, Thomas N. (1986). "Wood Decay in Silicified Gymnosperms from Antarctica." Botanical Gazette, 147(1):116-125. http://www.jstor.org/stable/2474817.

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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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