1887

Abstract

A haloalkaliphilic archaeon (strain DS12) isolated from Lake Zabuye, the Tibetan Plateau, China, was characterized to elucidate its taxonomy. The strain was aerobic, chemo-organotrophic, and grew optimally at 40 °C, pH 9·5–10·0 and 3·4 M NaCl. Cells of strain DS12 were non-motile cocci and stained Gram-variable. The major polar lipids of strain DS12 were diphytanyl and phytanyl-sesterterpanyl diether derivatives of phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester. No glycolipids were detected. Phylogenetic analysis revealed that the strain formed a distinct lineage within the family . The low 16S rRNA gene sequence similarity values to its closest relatives (91·5–92·5 %) and its signature bases both suggest that the strain has no close affinity with any members of the family with validly published names. Therefore, it is proposed that strain DS12 (=AS 1.3240=JCM 11890) represents the type strain of a novel species in a new genus, gen. nov., sp. nov.

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2005-11-01
2021-04-15
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