Chromatium okenii is a Gram-negative bacterium found in water. It is a purple sulfur bacterium.George M. Garrity: Bergey's Manual of Systematic Bacteriology. 2. Auflage. Springer, New York, 2005, Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria These bacteria are capable of photosynthesis and use Hydrogen sulfide (H2S) as an electron donor for CO2 reduction and so do not produce oxygen. This type of photosynthesis is called anoxygenic photosynthesis. Chromatium okenii is anaerobic and the cells are slightly curved or straight rods.
References
External links Chromatium J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature