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Cable bacteria with electric connection to oxygen attract flocks of diverse bacteria.
Bjerg, Jesper J; Lustermans, Jamie J M; Marshall, Ian P G; Mueller, Anna J; Brokjær, Signe; Thorup, Casper A; Tataru, Paula; Schmid, Markus; Wagner, Michael; Nielsen, Lars Peter; Schramm, Andreas.
Afiliación
  • Bjerg JJ; Center for Electromicrobiology (CEM), Section for Microbiology, Department of Biology, Aarhus University, Aarhus C, Denmark. jjbjerg@bio.au.dk.
  • Lustermans JJM; Microbial Systems Technology Excellence Centre, University of Antwerp, Wilrijk, Belgium. jjbjerg@bio.au.dk.
  • Marshall IPG; Center for Electromicrobiology (CEM), Section for Microbiology, Department of Biology, Aarhus University, Aarhus C, Denmark.
  • Mueller AJ; Center for Electromicrobiology (CEM), Section for Microbiology, Department of Biology, Aarhus University, Aarhus C, Denmark.
  • Brokjær S; Centre for Microbiology and Environmental Systems Science, Division of Microbial Ecology (DOME), University of Vienna, Vienna, Austria.
  • Thorup CA; Doctoral School in Microbiology and Environmental Science, University of Vienna, Vienna, Austria.
  • Tataru P; Center for Electromicrobiology (CEM), Section for Microbiology, Department of Biology, Aarhus University, Aarhus C, Denmark.
  • Schmid M; Center for Electromicrobiology (CEM), Section for Microbiology, Department of Biology, Aarhus University, Aarhus C, Denmark.
  • Wagner M; Bioinformatics Research Center (BiRC), Aarhus University, Aarhus C, Denmark.
  • Nielsen LP; Centre for Microbiology and Environmental Systems Science, Division of Microbial Ecology (DOME), University of Vienna, Vienna, Austria.
  • Schramm A; Centre for Microbiology and Environmental Systems Science, Division of Microbial Ecology (DOME), University of Vienna, Vienna, Austria.
Nat Commun ; 14(1): 1614, 2023 03 23.
Article en En | MEDLINE | ID: mdl-36959175
Cable bacteria are centimeter-long filamentous bacteria that conduct electrons via internal wires, thus coupling sulfide oxidation in deeper, anoxic sediment with oxygen reduction in surface sediment. This activity induces geochemical changes in the sediment, and other bacterial groups appear to benefit from the electrical connection to oxygen. Here, we report that diverse bacteria swim in a tight flock around the anoxic part of oxygen-respiring cable bacteria and disperse immediately when the connection to oxygen is disrupted (by cutting the cable bacteria with a laser). Raman microscopy shows that flocking bacteria are more oxidized when closer to the cable bacteria, but physical contact seems to be rare and brief, which suggests potential transfer of electrons via unidentified soluble intermediates. Metagenomic analysis indicates that most of the flocking bacteria appear to be aerobes, including organotrophs, sulfide oxidizers, and possibly iron oxidizers, which might transfer electrons to cable bacteria for respiration. The association and close interaction with such diverse partners might explain how oxygen via cable bacteria can affect microbial communities and processes far into anoxic environments.
Asunto(s)

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Oxígeno / Deltaproteobacteria Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Dinamarca

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Oxígeno / Deltaproteobacteria Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Dinamarca