Efficient Reduction of Iron Oxides by Paenibacillus spp. Strains Isolated from Tropical Soils |
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Authors: | Stéphanie Loyaux-Lawniczak Stéphane Vuilleumier Valérie A. Geoffroy |
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Affiliation: | 1. Laboratoire d’Hydrologie et de Géochimie de Strasbourg (LHyGeS), UMR 7517 CNRS-Université de Strasbourg, Strasbourg, France;2. Génétique Moléculaire, Génomique, Microbiologie, UMR 7156 CNRS-Université de Strasbourg, Strasbourg, France;3. Biotechnologie et signalisation cellulaire, UMR 7242 CNRS-Université de Strasbourg, ESBS, Illkirch-Graffenstaden, France |
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Abstract: | The genus Paenibacillus was hardly described as a Fe(III)-reducing agent, only limited to reduce soluble forms or Fe inserted in poorly crystallized structures. In this study, three Paenibacillus strains capable of reducing manganese oxides in addition to iron oxides were isolated from Cameroonian and Brazilian soils. These strains reduced iron minerals from poorly crystallized 2-line ferrihydrite to well-crystallized Al-substituted and pure goethite with a significant production of soluble ferrous iron. These Paenibacillus strains, inhabitants from ferralitic temporarily waterlogged soils, could play an important role in the bioweathering of minerals and metal mobility in soils. |
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Keywords: | Paenibacillus soils iron oxides weathering iron-reducing bacteria dissimilatory metal reduction |
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