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Abstract

A novel haloalkaliphilic archaeon, strain B23 was isolated from the former lake Texcoco in Mexico. The strain was Gram-stain-negative, the cells coccoid to ovoid rods, red pigmented and aerobic. Strain B23 grew in 1.7–4.3 M NaCl, at pH 6.5–9.5 and at 25–45 °C with optimal growth at 2.6–3.4 M NaCl, pH 7.5–8.5 and 37 °C. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain B23 was most closely related to SP2 with 97.3 % sequence similarity. The polar lipids of strain B23 were phosphatidylglycerol and several unidentified phospholipids. The G+C content of the DNA of the strain was 62.5 mol%. Levels of DNA–DNA relatedness between strain B23 and DSM 3393 was 32.3 %. The name sp. nov. is proposed. The type strain is B23 ( = CECT 8068 = JCM 17655).

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2013-11-01
2020-10-24
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