Diversity of culturable actinomycetes in hyper-arid soils of the Atacama Desert,Chile |
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Authors: | Chinyere K Okoro Roselyn Brown Amanda L Jones Barbara A Andrews Juan A Asenjo Michael Goodfellow Alan T Bull |
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Institution: | (1) School of Biology, University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK;(2) Department of Chemical Engineering and Biotechnology, University of Chile, Beauchef 861, Santiago, Chile;(3) Department of Biosciences, University of Kent, Canterbury, Kent, CT2 7NJ, UK |
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Abstract: | The Atacama Desert presents one of the most extreme environments on Earth and we report here the first extensive isolations
of actinomycetes from soils at various locations within the Desert. The use of selective isolation procedures enabled actinomycetes
to be recovered from arid, hyper-arid and even extreme hyper-arid environments in significant numbers and diversity. In some
cases actinomycetes were the only culturable bacteria to be isolated under the conditions of this study. Phylogenetic analysis
and some phenotypic characterisation revealed that the majority of isolates belonged to members of the genera Amycolatopsis, Lechevalieria and Streptomyces, a high proportion of which represent novel centres of taxonomic variation. The results of this study support the view that
arid desert soils constitute a largely unexplored repository of novel bacteria, while the high incidence of non-ribosomal
peptide synthase genes in our isolates recommend them as promising material in screening for new bioactive natural products. |
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Keywords: | Culturable actinomycetes Atacama Desert Hyper-arid soils |
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