Halorhabdus
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Halorhabdus
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| Halorhabdus Wainø et al. 2000 emend. Antunes et al. 2008
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In taxonomy, Halorhabdus is a genus of the Halobacteriaceae.
Contents
Description and significance
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 optimum of any living organism.
Genome structure
The genome of Halorhabdus was sequenced in August 2014.[1] The G + C content of its DNA is estimated to be 64%.
Cell structure and metabolism
The cells of Halorhabdus utahensis are extremely pleomorphic, exhibiting anything from irregular coccoid or ellipsoid to triangular, club-shaped or rod-shaped forms. The rod-shaped and ellipsoid cells are 2-10 * 0.5-1 µm and 1-2 * 1 µm in size, respectivelly, and the spherical cells have a diameter of approximately 1 µm. The archaeon utilizes 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.
Ecology
The strains of Halorhabdus utahensis were isolated from samples from Great Salt Lake, Utah, USA.[2]
References
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- ↑ See the NCBI webpage on Halorhabdus. Data extracted from the Lua error in package.lua at line 80: module 'strict' not found.
Further reading
Scientific journals
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Scientific books
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Scientific databases
- PubMed references for Halorhabdus
- PubMed Central references for Halorhabdus
- Google Scholar references for Halorhabdus
External links
- NCBI taxonomy page for Halorhabdus
- Search Tree of Life taxonomy pages for Halorhabdus
- Search Species2000 page for Halorhabdus
- MicrobeWiki page for Halorhabdus
- LSPN page for Halorhabdus
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