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Schwertmannite formation at cell junctions by a new filament-forming Fe(II)-oxidizing isolate affiliated with the novel genus Acidithrix.

Identifieur interne : 000615 ( Main/Exploration ); précédent : 000614; suivant : 000616

Schwertmannite formation at cell junctions by a new filament-forming Fe(II)-oxidizing isolate affiliated with the novel genus Acidithrix.

Auteurs : Jiro F. Mori [Allemagne] ; Shipeng Lu [Allemagne] ; Matthias H Ndel [Allemagne] ; Kai Uwe Totsche [Allemagne] ; Thomas R. Neu [Allemagne] ; Vasile Vlad Iancu [Allemagne] ; Nicolae Tarcea [Allemagne] ; Jürgen Popp [Allemagne] ; Kirsten Küsel [Allemagne]

Source :

RBID : pubmed:26506965

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English descriptors

Abstract

A 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 °C at a rate of 3.8 mM Fe(II) day(-1) in synthetic medium and 3.0 mM Fe(II) day(-1) 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 for both the formation and transformation of the pelagic iron-rich aggregates at oxic/anoxic transition zones in the acidic lignite mine lake.

DOI: 10.1099/mic.0.000205
PubMed: 26506965


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<div type="abstract" xml:lang="en">A 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 °C at a rate of 3.8 mM Fe(II) day(-1) in synthetic medium and 3.0 mM Fe(II) day(-1) 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 for both the formation and transformation of the pelagic iron-rich aggregates at oxic/anoxic transition zones in the acidic lignite mine lake.</div>
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<ELocationID EIdType="doi" ValidYN="Y">10.1099/mic.0.000205</ELocationID>
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<AbstractText>A 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 °C at a rate of 3.8 mM Fe(II) day(-1) in synthetic medium and 3.0 mM Fe(II) day(-1) 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 for both the formation and transformation of the pelagic iron-rich aggregates at oxic/anoxic transition zones in the acidic lignite mine lake.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Mori</LastName>
<ForeName>Jiro F</ForeName>
<Initials>JF</Initials>
<AffiliationInfo>
<Affiliation>Aquatic Geomicrobiology, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Lu</LastName>
<ForeName>Shipeng</ForeName>
<Initials>S</Initials>
<AffiliationInfo>
<Affiliation>The German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Aquatic Geomicrobiology, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Händel</LastName>
<ForeName>Matthias</ForeName>
<Initials>M</Initials>
<AffiliationInfo>
<Affiliation>Hydrogeology, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Totsche</LastName>
<ForeName>Kai Uwe</ForeName>
<Initials>KU</Initials>
<AffiliationInfo>
<Affiliation>Hydrogeology, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Neu</LastName>
<ForeName>Thomas R</ForeName>
<Initials>TR</Initials>
<AffiliationInfo>
<Affiliation>Department of River Ecology, Helmholtz Centre for Environmental Research-UFZ, Magdeburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
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<LastName>Iancu</LastName>
<ForeName>Vasile Vlad</ForeName>
<Initials>VV</Initials>
<AffiliationInfo>
<Affiliation>Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Tarcea</LastName>
<ForeName>Nicolae</ForeName>
<Initials>N</Initials>
<AffiliationInfo>
<Affiliation>Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Popp</LastName>
<ForeName>Jürgen</ForeName>
<Initials>J</Initials>
<AffiliationInfo>
<Affiliation>Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Institute of Photonic Technology, Jena, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Küsel</LastName>
<ForeName>Kirsten</ForeName>
<Initials>K</Initials>
<AffiliationInfo>
<Affiliation>Aquatic Geomicrobiology, Friedrich Schiller University Jena, Jena, Germany.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>The German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2015</Year>
<Month>10</Month>
<Day>26</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>Microbiology (Reading)</MedlineTA>
<NlmUniqueID>9430468</NlmUniqueID>
<ISSNLinking>1350-0872</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D005296">Ferrous Compounds</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D058085">Iron Compounds</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="C511969">schwertmannite</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
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<MeshHeading>
<DescriptorName UI="D039903" MajorTopicYN="N">Actinobacteria</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName>
<QualifierName UI="Q000302" MajorTopicYN="N">isolation & purification</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005296" MajorTopicYN="N">Ferrous Compounds</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D007365" MajorTopicYN="N">Intercellular Junctions</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D058085" MajorTopicYN="N">Iron Compounds</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D060106" MajorTopicYN="N">Lakes</DescriptorName>
<QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008969" MajorTopicYN="N">Molecular Sequence Data</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010084" MajorTopicYN="N">Oxidation-Reduction</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010802" MajorTopicYN="N">Phylogeny</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012914" MajorTopicYN="N">Snow</DescriptorName>
<QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
</MeshHeading>
</MeshHeadingList>
</MedlineCitation>
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<Day>29</Day>
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</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2016</Year>
<Month>10</Month>
<Day>19</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">26506965</ArticleId>
<ArticleId IdType="doi">10.1099/mic.0.000205</ArticleId>
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</pubmed>
<affiliations>
<list>
<country>
<li>Allemagne</li>
</country>
<region>
<li>District de Leipzig</li>
<li>Saxe (Land)</li>
<li>Saxe-Anhalt</li>
</region>
<settlement>
<li>Leipzig</li>
<li>Magdebourg</li>
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<name sortKey="H Ndel, Matthias" sort="H Ndel, Matthias" uniqKey="H Ndel M" first="Matthias" last="H Ndel">Matthias H Ndel</name>
<name sortKey="Iancu, Vasile Vlad" sort="Iancu, Vasile Vlad" uniqKey="Iancu V" first="Vasile Vlad" last="Iancu">Vasile Vlad Iancu</name>
<name sortKey="Kusel, Kirsten" sort="Kusel, Kirsten" uniqKey="Kusel K" first="Kirsten" last="Küsel">Kirsten Küsel</name>
<name sortKey="Kusel, Kirsten" sort="Kusel, Kirsten" uniqKey="Kusel K" first="Kirsten" last="Küsel">Kirsten Küsel</name>
<name sortKey="Lu, Shipeng" sort="Lu, Shipeng" uniqKey="Lu S" first="Shipeng" last="Lu">Shipeng Lu</name>
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<name sortKey="Neu, Thomas R" sort="Neu, Thomas R" uniqKey="Neu T" first="Thomas R" last="Neu">Thomas R. Neu</name>
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<name sortKey="Popp, Jurgen" sort="Popp, Jurgen" uniqKey="Popp J" first="Jürgen" last="Popp">Jürgen Popp</name>
<name sortKey="Tarcea, Nicolae" sort="Tarcea, Nicolae" uniqKey="Tarcea N" first="Nicolae" last="Tarcea">Nicolae Tarcea</name>
<name sortKey="Totsche, Kai Uwe" sort="Totsche, Kai Uwe" uniqKey="Totsche K" first="Kai Uwe" last="Totsche">Kai Uwe Totsche</name>
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