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Anaerobic growth of halophilic archaeobacteria by reduction of dimethylsulfoxide and trimethylamine N-oxide

Aharon Oren, Hans G. Trüper
DOI: http://dx.doi.org/10.1111/j.1574-6968.1990.tb03772.x 33-36 First published online: 1 June 1990

Summary

Most representatives of the halophilic archaeobacterial genera Halobacterium, Haloarcula and Haloferax tested were able to reduce dimethylsulfoxide (DMSO) to dimethylsulfide (DMS) and trimethylamine N-oxide (TMAO) to trimethylamine (TMA) under (semi)anaerobic conditions. In most cases the reduction of DMSO and TMAO was accompanied by an increase in cell yield. The ability to reduce DMSO or TMAO was not correlated to reduced DMSO or TMAO was not correlated with the ability to reduce nitrate to nitrite. Anaerobic respiration with DMSO and TMAO as electron acceptor supplies the halophilic archaeobacteria with an additional mode of energy generation in the absence of molecular oxygen.

Key words
  • Halobacterium
  • Haloferax
  • Haloarcula
  • Archaeobacteria
  • Dimethylsulfoxide
  • Trimethylamine N-oxide
  • Anaerobic growth

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