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Laufer, Katja ; Nordhoff, Mark ; Halama, Max ; Martinez, Raul E. ; Obst, Martin ; Nowak, Marcus ; Stryhanyuk, Hryhoriy ; Richnow, Hans-Hermann ; Kappler, Andreas:
Microaerophilic Fe(II)-Oxidizing Zetaproteobacteria Isolated from Low-Fe Marine Coastal Sediments : Physiology and Composition of Their Twisted Stalks.
In: Applied and Environmental Microbiology.
Bd. 83
(2017)
Heft 8
.
- e03118-16.
ISSN 1098-5336
DOI: https://doi.org/10.1128/AEM.03118-16
Abstract
Microaerophilic Fe(II) oxidizers are commonly found in habitats contain- ing elevated Fe(II) and low O2 concentrations and often produce characteristic Fe mineral structures, so-called twisted stalks or tubular sheaths. Isolates originating from freshwater habitats are all members of the Betaproteobacteria, while isolates from marine habitats belong almost exclusively to the Zetaproteobacteria. So far, only a few isolates of marine microaerophilic Fe(II) oxidizers have been described, all of which are obligate microaerophilic Fe(II) oxidizers and have been thought to be restricted to Fe-rich systems. Here, we present two new isolates of marine microaerophilic Fe(II)-oxidizing Zetaproteobacteria that originate from typical coastal marine sediments containing only low Fe concentrations (2 to 11 mg of total Fe/g of sediment [dry weight]; 70 to 100 μ