The Ectothiorhodospiraceae are a family of purple sulfur bacteria, distinguished by producing sulfur globules outside of their cells.George M. Garrity: Bergey's Manual of Systematic Bacteriology. 2. Auflage. Springer, New York, 2005, Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria The cells are rod-shaped, vibrioid, or spirilla, and they are able to move using flagella. In general, they are marine and prefer anaerobic conditions. Ectothiorhodospiraceae are a vibrio bacteria that require salty living conditions to survive and grow: classifying them as slightly halophilic. Like all purple sulfur bacteria, they are capable of photosynthesis. To complete this energy process, Sulfur compounds are used as electron donors for carbon fixation in the pentose phosphate pathway. This elemental sulfur accumulates outside of the cells.
Ectothiorhodospiraceae mobilis table of characteristics Test TypeTestCharacteristicsColony CharacteristicsSize0.7-1.0μmMorphological CharacterShapeshort spiral/ bent rodGram -Physiological CharacterMotility +NaCl optimum %2-3pH optimum7.6-8.0Acid Produced FromHydrogen +Sulfide +Lactate +/-Acetate +Malate +Succinate +Ethanol -Propanol - Note: + = positive, - = negative
References
External links J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature - Ectothiorhodospiraceae