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    Microbial diversity on the Tatahouine meteorite

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    Author
    Benzerara, K.
    Chapon, V.
    Moreira, D.
    López-García, P.
    Issue Date
    2006-01-01
    Keywords
    Biological activity
    Biological contamination
    Biological signature
    
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    Citation
    Benzerara, K., Chapon, V., Moreira, D., López-García, P., Guyot, F., & Heulin, T. (2006). Microbial diversity on the Tatahouine meteorite. Meteoritics & Planetary Science, 41(8), 1249-1265.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656167
    DOI
    10.1111/j.1945-5100.2006.tb00519.x
    Additional Links
    https://meteoritical.org/
    Abstract
    Biological processes can alter the chemistry and mineralogy of meteorites in a very short time, even in cold or hot deserts. It is thus important to assess the diversity of microorganisms that colonize meteorites in order to better understand their physiological capabilities. Microscopy observations of Tatahouine meteorite fragments that were exposed for 70 years in the Sahara desert showed that they were colonized by morphologically diverse biomorphs. A molecular diversity study based on 16S rRNA gene amplification of DNA supported the conclusion that a huge taxonomic diversity of prokaryotes colonized the Tatahouine meteorite in less than 70 years in the Tatahouine sand. Eleven different bacterial divisions were evidenced, among which Cytophaga-Flexibacter- Bacteroides (CFB), Cyanobacteria, and Alpha-Proteobacteria were dominantly represented. Crenarcheota were also detected. Most of the Tatahouine meteorite phylotypes were related to sequences identified in the surrounding Tatahouine more generally to sequences detected in soils. Some of them, in particular many of the archaeal phylotypes, were detected in arid regions in association with desert varnish. The results suggest that the diversity of the clone library generated from the meteorite fraction was reduced compared with that of the Tatahouine sand clone library, which can be explained as the result of partial colonization of the meteorite and/or a specific selection of colonizing bacteria by the substrate. We discuss the possibility that several groups detected in this study may play a prominent role in the various alteration processes detected at the surface of the Tatahouine meteorite.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2006.tb00519.x
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    Meteoritics & Planetary Science, Volume 41, Number 8 (2006)

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