, Volume 12, Issue 4, pp 529–539

Novel halophilic aerobic anoxygenic phototrophs from a Canadian hypersaline spring system


  • Julius T. Csotonyi
    • Department of MicrobiologyUniversity of Manitoba
  • Jolantha Swiderski
    • DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
  • Erko Stackebrandt
    • DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
    • Department of MicrobiologyUniversity of Manitoba
Original Paper

DOI: 10.1007/s00792-008-0156-8

Cite this article as:
Csotonyi, J.T., Swiderski, J., Stackebrandt, E. et al. Extremophiles (2008) 12: 529. doi:10.1007/s00792-008-0156-8


The first enumeration of cultivable obligately aerobic phototrophic bacteria from a terrestrial saline spring was accomplished in the East German Creek system (salinity ∼6%), near Lake Winnipegosis, Manitoba, Canada. Occurring at densities up to 3.3 × 107 CFU/ml of sample, aerobic phototrophs comprised 15–36% of the total cultivable bacterial population in the diatom- and chlorophyte-dominated aerobic microbial mats. Many of the representative strains isolated for phenotypic characterization and phylogenetic analysis possessed <96% 16S rDNA sequence overlap with published species, including an obligately aerobic phototrophic gammaproteobacterium displaying only 92.9% 16S rDNA sequence similarity to Congregibacter litoralis. The springs yielded the most highly halotolerant aerobic anoxygenic phototroph yet recorded, strain EG11, which grew with 26% NaCl.


Aerobic anoxygenic phototrophsPhototrophic halophilesHypersaline springsBacteriochlorophyllPhysiology

Copyright information

© Springer 2008