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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Microbiol
2017 ; 8
(ä): 2055
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English Wikipedia
The Identification of Cable Bacteria Attached to the Anode of a Benthic Microbial
Fuel Cell: Evidence of Long Distance Extracellular Electron Transport to
Electrodes
#MMPMID29114243
Reimers CE
; Li C
; Graw MF
; Schrader PS
; Wolf M
Front Microbiol
2017[]; 8
(ä): 2055
PMID29114243
show ga
Multicellular, filamentous, sulfur-oxidizing bacteria, known as cable bacteria,
were discovered attached to fibers of a carbon brush electrode serving as an
anode of a benthic microbial fuel cell (BMFC). The BMFC had been operated in a
temperate estuarine environment for over a year before collecting anode samples
for scanning electron microscopy and phylogenetic analyses. Individual filaments
were attached by single terminus cells with networks of pilus-like nano-filaments
radiating out from these cells, across the anode fiber surface, and between
adjacent attachment locations. Current harvesting by the BMFC poised the anode at
potentials of ~170-250 mV vs. SHE, and these surface potentials appear to have
allowed the cable bacteria to use the anode as an electron acceptor in a
completely anaerobic environment. A combination of catalyzed reporter deposition
fluorescent in situ hybridization (CARD-FISH) and 16S rRNA gene sequence analysis
confirmed the phylogeny of the cable bacteria and showed that filaments often
occurred in bundles and in close association with members of the genera
Desulfuromonas. However, the Desulfobulbaceae Operational Taxonomic Units (OTUs)
from the 16S sequencing did not cluster closely with other putative cable
bacteria sequences suggesting that the taxonomic delineation of cable bacteria is
far from complete.