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| Titel |
Taking nature into lab: biomineralization by heavy metal-resistant streptomycetes in soil |
| VerfasserIn |
E. Schütze, A. Weist, M. Klose, T. Wach, M. Schumann, S. Nietzsche, D. Merten, J. Baumert, J. Majzlan, E. Kothe |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 6 ; Nr. 10, no. 6 (2013-06-03), S.3605-3614 |
| Datensatznummer |
250018272
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| Publikation (Nr.) |
 copernicus.org/bg-10-3605-2013.pdf |
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| Zusammenfassung |
| Biomineralization by heavy metal-resistant streptomycetes was tested to
evaluate the potential influence on metal mobilities in soil. Thus, we
designed an experiment adopting conditions from classical laboratory methods
to natural conditions prevailing in metal-rich soils with media spiked with
heavy metals, soil agar, and nutrient-enriched or unamended soil incubated
with the bacteria. As a result, all strains were able to form struvite
minerals (MgNH4PO4• 6H2O) on tryptic soy broth
(TSB)-media supplemented with AlCl3, MnCl2 and CuSO4, as well
as on soil agar. Some strains additionally formed struvite on
nutrient-enriched contaminated and control soil, as well as on metal
contaminated soil without addition of media components. In contrast,
switzerite (Mn3(PO4)2• 7H2O) was exclusively
formed on minimal media spiked with MnCl2 by four heavy metal-resistant
strains, and on nutrient-enriched control soil by one strain. Hydrated nickel
hydrogen phosphate was only crystallized on complex media supplemented with
NiSO4 by most strains. Thus, mineralization is a dominant property of
streptomycetes, with different processes likely to occur under laboratory
conditions and sub-natural to natural conditions. This new understanding
might have implications for our understanding of biological metal resistance
mechanisms. We assume that biogeochemical cycles, nutrient storage and metal
resistance might be affected by formation and re-solubilization of minerals
like struvite in soil at microscale. |
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