Halorhabdus utahensis
| Halorhabdus utahensis | |
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| Species: | H. utahensis
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| Halorhabdus utahensis Wainø et al. 2000[1]
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Halorhabdus utahensis is a halophilic archaeon isolated from the Great Salt Lake in Utah.[2]
Cell structure and metabolism
[edit]Halorhabdus utahensis (salt-loving rod) is a motile, Gram-negative, extremely halophilic archaeon that forms red, circular colonies. It grows at the temperatures between 17 and 55 °C, with optimal growth occurring at 50 °C. It can also grow over a pH range of 5.5–8.5 with the optimal pH value between 6.7 and 7.1. Further, with its extremely high salinity optimum of 27% NaCl, Halorhabdus has one of the highest reported salinity optima of any living organism.
The cells of H. utahensis are extremely pleomorphic, exhibiting any shape from irregular coccoid or ellipsoid to triangular, club-shaped or rod-shaped forms. The rod-shaped and ellipsoid cells are 2-10 by 0.5-1 μm and 1-2 by 1 μm in size, respectively, and the spherical cells have a diameter of approximately 1 μm. The archaeon uses only a limited range of substrates, such as glucose, xylose, and fructose, for growth, and is unique in its inability to utilize yeast extract or peptone. Other substances that did not stimulate the organism's growth include organic acids, amino acids, alcohols, glycogen, and starch.
References
[edit]- ^ "LPSN - List of Prokaryotic names with Standing in Nomenclature". Deutsche Sammlung von Mikroorganismen und Zellkulturen. Retrieved 2022-07-12.
- ^ See the NCBI webpage on Halorhabdus. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
Further reading
[edit]Scientific journals
[edit]- Waino M, Tindall BJ, Ingvorsen K (2000). "Halorhabdus utahensis gen. nov., sp. nov., an aerobic, extremely halophilic member of the Archaea from Great Salt Lake, Utah". Int. J. Syst. Evol. Microbiol. 50: 183–190. doi:10.1099/00207713-50-1-183. PMID 10826803.
Scientific books
[edit]- Gibbons, NE (1974). "Family V. Halobacteriaceae fam. nov.". In RE Buchanan; NE Gibbons (eds.). Bergey's Manual of Determinative Bacteriology (8th ed.). Baltimore: The Williams & Wilkins Co.
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