Anoxygenic Phototrophic and Related Sulfur-Cycling Prokaryotes from Lake Fryxell, McMurdo Dry Valleys, Antarctica

The former are the results of enrichment culture experiments for the following groups of organisms: anoxygenic phototrophic bacteria (purple and green bacteria); sulfate-reducing bacteria; sulfur-oxidizing chemolithotrophic bacteria. In some cases enrichment culture experiments were negative, but in many others, cultures were obtained and many of these are now pure (axenic) cultures.

These organisms are currently being characterized to define their basic properties. Many turn out to be new species and some show distinct cold adaptation. All are capable of growth at low temperatures.