Ectothiorhodospiraceae
Scientific classification Edit this classification
Domain: Bacteria
Phylum: Pseudomonadota
Class: Gammaproteobacteria
Order: Chromatiales
Family: Ectothiorhodospiraceae
Genera[1][2]

The Ectothiorhodospiraceae are a family of purple sulfur bacteria, distinguished by producing sulfur globules outside of their cells.[4] 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.[4] Ectothiorhodospiraceae are a vibrio bacteria that require salty living conditions to survive and grow: classifying them as slightly halophilic.[4] 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.[4] This elemental sulfur accumulates outside of the cells.[4]


Ectothiorhodospiraceae mobilis Table of Characteristics[4]

Test Type Test Characteristics
Colony Characteristics Size 0.7-1.0μm
Morphological Character Shape short spiral/ bent rod
Gram -
Physiological Character Motility +
NaCl optimum % 2-3
pH optimum 7.6-8.0
Acid Produced From Hydrogen +
Sulfide +
Lactate +/-
Acetate +
Malate +
Succinate +
Ethanol -
Propanol -

Note: + = positive, - = negative

References

  1. Euzéby JP, Parte AC. "Ectothiorhodospiraceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved August 26, 2021.
  2. Parker, Charles Thomas; Wigley, Sarah; Garrity, George M (14 May 2009). Parker, Charles Thomas; Garrity, George M (eds.). "Taxonomic Abstract for the families". NamesforLife, LLC. doi:10.1601/tx.2154. {{cite journal}}: Cite journal requires |journal= (help)
  3. Dirren S, Posch T. (2016). "Promiscuous and specific bacterial symbiont acquisition in the amoeboid genus Nuclearia (Opisthokonta)". FEMS Microbiol Ecol. 92 (8): fiw105. doi:10.1093/femsec/fiw105. PMID 27199347.
  4. 1 2 3 4 5 6 George M. Garrity: Bergey's Manual of Systematic Bacteriology. 2. Auflage. Springer, New York, 2005, Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria


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