Torreblanca et al. 1986
Description and significance
Haloarcula are extreme halophilic archaeons. They are distinguished from other genera in the Halobacteriaceae family by the presence of specific derivatives of TGD-2 polar lipids. There are currently seven recognized species in the genus: H. vallismortis, H. marismortui, H. hispanica, H. japonica, H. argentinensis, H. mukohataei, and H. quadrata. H. quadrata was first isolated when researchers were attempting to culture Haloquadratum walsbyi, a haloarchaeon that was thought to be unculturable until 2004.
Haloarcula grow optimally at 40–45 °C. Growth appears in sheets of 65 cells often in the shape of a square or triangle.
Haloarcula are found in neutral saline environments like salt lakes, marine salterns, and saline soils. Like other members of the Halobacteriaceae family, Haloarcula require at least 1.5 M NaCl for growth, but grow optimally in 2.0 to 4.5 M NaCl.
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- Torreblanca M, Rodriquez-Valera F, Juez G, Ventosa A, Kamekura M, Kates M (1986). "Classification of non-alkaliphilic halobacteria based on numerical taxonomy and polar lipid composition, and description of Haloarcula gen. nov. and Haloferax gen.nov". Syst. Appl. Microbiol. 8: 89–99.
- Javor B, Requadt C, Stoeckenius W (1982). "Box-shaped halophilic bacteria". J. Bacteriol. 151 (3): 1532–1542. PMC 220435. PMID 6286602.
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