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Sökning: WFRF:(Romeralo Maria) > (2012)

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  • Perrigo, Allison L., et al. (författare)
  • What's on your boots : an investigation into the role we play in protist dispersal
  • 2012
  • Ingår i: Journal of Biogeography. - : Wiley. - 0305-0270 .- 1365-2699. ; 39:5, s. 998-1003
  • Tidskriftsartikel (refereegranskat)abstract
    • D. M. Wilkinson (2010, Journal of Biogeography, 37, 393–397) suggested that anthropogenic dispersal is an understudied and potentially important factor in terrestrial protist biogeography. We investigated human footwear as a potential vector of dictyostelids, a diverse group of amoebae that includes both geographically restricted and cosmopolitan species. Eighteen pairs of boots were examined and dictyostelids were isolated from nearly all samples larger than 5.0 g. In total, six dictyostelid isolates were recovered, corresponding to four species –Dictyostelium minutum, D. sphaerocephalum, D. leptosomopsis and a new species, Polysphondylium sp. 1. Myxogastrid amoebae and acrasid-like aggregations were also observed. Thus anthropogenic dispersal of naked amoebae appears to occur. The possible role of variations in dictyostelid fruiting body morphologies in dispersal potential is also discussed. These results support Wilkinson’s proposal and suggest that dictyostelids may be a useful group with which to study anthropogenic dispersal of terrestrial protists.
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3.
  • Romeralo, Maria, et al. (författare)
  • Evolution and Diversity of Dictyostelid Social Amoebae
  • 2012
  • Ingår i: Protist. - : Elsevier BV. - 1434-4610 .- 1618-0941. ; 163:3, s. 327-343
  • Forskningsöversikt (refereegranskat)abstract
    • Dictyostelid social amoebae are a large and ancient group of soil microbes with an unusual multicellular stage in their life cycle. Taxonomically, they belong to the eukaryotic supergroup Amoebozoa, the sister group to Opisthokonta (animals + fungi). Roughly half of the similar to 150 known dictyostelid species were discovered during the last five years and probably many more remain to be found. The traditional classification system of Dictyostelia was completely overturned by cladistic analyses and molecular phylogenies of the past six years. As a result, it now appears that, instead of three major divisions there are eight, none of which correspond to traditional higher-level taxa. In addition to the widely studied Dictyostelium discoideum, there are now efforts to develop model organisms and complete genome sequences for each major group. Thus Dictyostelia is becoming an excellent model for both practical, medically related research and for studying basic principles in cell-cell communication and developmental evolution. In this review we summarize the latest information about their life cycle, taxonomy, evolutionary history, genome projects and practical importance.
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