Halomonas elongata

Halomonas elongata is considered the type species of the genus Halomonas. It is a chemoorganotrophic, halophilic bacterium first isolated from a solar salt facility located in Bonaire, Netherlands Antilles.[1]

Halomonas elongata
Scientific classification
Domain: Bacteria
Phylum: Pseudomonadota
Class: Gammaproteobacteria
Order: Oceanospirillales
Family: Halomonadaceae
Genus: Halomonas
Species:
H. elongata
Binomial name
Halomonas elongata
Vreeland et al. 1980

Biology and biochemistry

Morphology

Halomonas elongata cells are gram-negative rods which are motile by either polar or peritrichous flagella.[1] On a solid medium, H. elongata produce glistening, opaque white colonies that are about 2 mm in diameter.[1]

Physiology

Halomonas elongata are able to reduce NO3 to NO2 and are able to grow anaerobically in the presence of NO3.[1] Cells of H. elongata are capable of utilizing malonate, fermenting glucose, and oxidizing glycerol, sucrose, mannose and cellobiose. Most strains of H. elongata can also oxidize lactose and gluconate.[1] All strains are susceptible to HgCl2 and chloromycetin but have only a slight susceptibility to other antibiotics like penicillin, streptomycin, tetracycline, ampicillin, vibriostat O/129, novobiocin, neomycin, bacitracin and nalidixic acid.[1]

Halomonas elongata grows in a pH range of 5 to 9 and a temperature range of 4-45 °C.[1] The optimum temperature being 30 °C. These organisms are also able to grow over a wide range of salt concentrations. All nine isolates first found at the Bonaire, Netherlands Antilles solar salt facility were capable of surviving in salt concentrations from 3.5 to 20%.[1]

Genomics

Halomonas elongata strains 1H9 and 1H11 have G+C contents of 60.5 %.[1] H. elongata has a total genome size of 4.06 Mb.[2]

References
  1. Vreeland RH, Litchfield CD, Martin EL, Elliot E (April 1980). "Halomonas elongata, a New Genus and Species of Extremely Salt-Tolerant Bacteria". International Journal of Systematic Bacteriology. 30 (2): 485–495. doi:10.1099/00207713-30-2-485.
  2. Schwibbert K, Marin-Sanguino A, Bagyan I, Heidrich G, Lentzen G, Seitz H, et al. (August 2011). "A blueprint of ectoine metabolism from the genome of the industrial producer Halomonas elongata DSM 2581 T". Environmental Microbiology. 13 (8): 1973–1994. doi:10.1111/j.1462-2920.2010.02336.x. PMC 3187862. PMID 20849449.
  • "Halomonas elongata 1H9". The Bacterial Diversity Metadatabase. Mesophilic bacterium that was isolated from solar salt facility
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