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dc.contributor.authorMori, Jiro F.
dc.contributor.authorLu, Shipeng
dc.contributor.authorH�ndel, Matthias
dc.contributor.authorTotsche, Kai Uwe
dc.contributor.authorNeu, Thomas R.
dc.contributor.authorVlad Iancu, Vasile
dc.contributor.authorTarcea, Nicolae
dc.contributor.authorPopp, J�rgen
dc.contributor.authorK�sel, Kirsten
dc.identifier.citationMori, Jiro F. , Shipeng Lu, Matthias Händel, Kai Uwe Totsche, Thomas R. Neu, Vasile Vlad Iancu, Nicolae Tarcea, Jürgen Popp, and Kirsten Küsel. "Schwertmannite formation at cell junctions by a new filament-forming Fe(II)-oxidizing isolate affiliated with the novel genus ." Microbiology 162, no. 1 (January 2016): 62-71. DOI: 10.1099/mic.0.000205.en_US
dc.description.abstractA new acidophilic iron-oxidizing strain (C25) belonging to the novel genus Acidithrix was isolated from pelagic iron-rich aggregates (‘iron snow’) collected below the redoxcline of an acidic lignite mine lake. Strain C25 catalysed the oxidation of ferrous iron [Fe(II)] under oxic conditions at 25 8C at a rate of 3.8 mM Fe(II) day21 in synthetic medium and 3.0 mM Fe(II) day21 in sterilized lake water in the presence of yeast extract, producing the rust-coloured, poorly crystalline mineral schwertmannite [Fe(III) oxyhydroxylsulfate]. During growth, rod-shaped cells of strain C25 formed long filaments, and then aggregated and degraded into shorter fragments, building large cell–mineral aggregates in the late stationary phase. Scanning electron microscopy analysis of cells during the early growth phase revealed that Fe(III)-minerals were formed as single needles on the cell surface, whereas the typical pincushion-like schwertmannite was observed during later growth phases at junctions between the cells, leaving major parts of the cell not encrusted. This directed mechanism of biomineralization at specific locations on the cell surface has not been reported from other acidophilic iron-oxidizing bacteria. Strain C25 was also capable of reducing Fe(III) under micro-oxic conditions which led to a dissolution of the Fe(III)-minerals. Thus, strain C25 appeared to have ecological relevance both for the formation and transformation of the pelagic iron-rich aggregates at oxic/anoxic transition zones in the acidic lignite mine lake.en_US
dc.description.sponsorshipJ. M. was supported by 'Alteration and element mobility at the microbe-mineral interface' (GRK1257), which is part of the Jena School for Microbial Communication and funded by the German Research Foundation (Deutsche Forschungsgemeinschaft)en_US
dc.titleSchwertmannite formation at cell junctions by a new filament-forming Fe(II)-oxidizing isolate affiliated with the novel genusen_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.contributor.orcidLu, Shipeng|0000-0002-1817-0417en_US

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