The Prokaryotes

@inproceedings{Wood2014TheP,
  title={The Prokaryotes},
  author={Ann P. Wood},
  booktitle={Springer Berlin Heidelberg},
  year={2014}
}
  • A. Wood
  • Published in Springer Berlin Heidelberg 2014
The family Achromatiaceae (comprising the single genus Achromatium) is a group of morphologically conspicuous, single-celled, free-living, colorless sulfur-oxidizing bacteria which forms a coherent phylogenetic group within the Gammaproteobacteria. They have yet to be grown in laboratory culture, but ecophysiological measurements suggest they gain energy from sulfide oxidation and may use oxygen and/or nitrate as a terminal electron acceptor. Some Achromatium can fix inorganic carbon, but it is… 
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References

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TLDR
Unexpected diversity has been uncovered in Achromatium populations and it is now clear that the organism routinely described as Achrom atium oxaliferum actually comprises several distinct AchromAtium spp.
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TLDR
Physical enrichments of achromatia collected from the acidic Lake Fuchskuhle, which houses a peculiar, smaller variety, and the neutral Lake Stechlin were investigated by the cultivation-independent rRNA approach, revealingound differences in the population structure of a Chromatium oxaliferum.
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TLDR
It is proposed that this unique adaptation of Achromatium is a means of overcoming a challenge not faced by other giant sulfur bacteria, namely inherently low levels of free sulfide in their sedimentary environment.
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TLDR
It was concluded that A. oxaliferum was related to organisms of the Chromatium assemblage but constituted a novel lineage within this group of bacteria.
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TLDR
Under oxic conditions, rates of sulfate production in the presence of sodium molybdate were found to correlate strongly with the number of cells added to sediment cores, providing further evidence for a role for A. oxaliferum in the oxidation of reduced sulfur.
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TLDR
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TLDR
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TLDR
The distribution of different subpopulations of Achromatium in relation to sediment redox profiles indicated that the genetically and morphologically distinct organisms that coexisted in a single sediment were also ecologically distinct and were adapted to different redox conditions.
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TLDR
Incubation of Achromatium-bearing sediment cores from Rydal Water with35S-labelled sulfate in the presence and absence of sodium molybdate demonstrated that this bacterial population was capable of oxidizing sulfide to intracellular elemental sulfur.
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