| halosimplex carlsbadense gen. nov., sp. nov., a unique halophilic archaeon, with three 16s rrna genes, that grows only in defined medium with glycerol and acetate or pyruvate. | a halophilic archaeon has been isolated from unsterilized salt crystals taken from the 250-million-year-old salado formation in southeastern new mexico. this microorganism grows only on defined media supplemented with either a combination of acetate and glycerol, glycerol and pyruvate, or pyruvate alone. the archaeon is unable to grow on complex media or to use carbohydrates, amino acids, fats, proteins, or nucleic acids for growth. unlike other halophilic microbes, this organism possesses four ... | 2002 | 12486452 |
| intragenomic heterogeneity and intergenomic recombination among haloarchaeal rrna genes. | more than one copy of rrna operons, which code for both the small-subunit (ssu) and large-subunit (lsu) rrna, are often found in prokaryotes. it is generally assumed that all rrna operons within a single cell are almost identical. a notable exception is the extremely halophilic archaeal genus haloarcula, most species of which are known to harbor highly divergent rrna operons that differ at approximately 5% of the nucleotide positions in the ssu gene and at 1 to 2% of the nucleotide positions in ... | 2004 | 15175312 |
| phylogenetic relationships within the order halobacteriales inferred from 16s rrna gene sequences. | phylogenetic relationships within the halophilic archaea were inferred from comparisons of the 16s rrna gene sequences from 61 strains, representing 18 genera with validly published names within the order halobacteriales. trees produced using distance-matrix (least-squares and neighbour-joining) methods affirm with strong bootstrap support that the members of the order halobacteriales are a monophyletic group. ten genera were supported as monophyletic groups [haloarcula, halobiforma, halococcus, ... | 2006 | 16738095 |
| halobellus clavatus gen. nov., sp. nov. and halorientalis regularis gen. nov., sp. nov., two new members of the family halobacteriaceae. | four halophilic archaeal strains were isolated from brines sampling from two artificial marine solar salterns at eastern china. strains tnn18t and tnn28t were isolated from tainan marine solar saltern, whereas strains tbn12 and tbn19 were from taibei marine solar saltern. colonies of the four strains were red-pigmented and their cells were pleomorphic rod, motile, and stained gram-negative. strains tnn18t and tbn12 were able to grow at 25-50°c (optimum 37°c), at 100-300 g/l nacl (optimum 150 g/l ... | 2010 | 21169458 |
| halovenus aranensis gen. nov., sp. nov., a novel extremely halophilic archaeon fromaran-bidgol salt lake, iran. | a novel red-pigmented halophilic archaeon, strain eb27t, was isolated from aran-bidgolsalt lake, a hypersaline playa in iran. the cells of strain eb27t were nonmotile and pleomorphic, from rods to triangular or disk shaped. strain eb27t needs at least 2.5 m nacl and 0.1 m mgcl2 for growth. optimal growth was achieved at 4 m nacl and 0.5 m mgcl2. the optimum ph and temperature for growth were ph 7.5 and 40 -¦c, respectively, while it was able to grow over a ph range and a temperature range of 6.0 ... | 2011 | 21828022 |