Natronorubrum sulfidifaciens sp. nov., an extremely haloalkaliphilic archaeon isolated from Aiding salt lake in Xin-Jiang, China

Heng Lin Cui, Dilbr Tohty, Hong Can Liu, Shuang Jiang Liu, Aharon Oren, Pei Jin Zhou

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Abstract

An extremely haloalkaliphilic archaeon, strain AD2T, was isolated from Aiding salt lake in Xin-Jiang China. Strain AD2T required at least 12% NaCl for growth. MgCl2 was not required. The isolate was able to grow over a pH range of 8.0-10.0 and temperature range of 20-55°C, with optimal growth at pH 8.7-9.2 and 44-47°C. The major polar lipids of strain AD2T were phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester; glycolipids were not detected. Analysis of its 16S rRNA gene sequence indicated that strain AD2T was phylogenetically related to members of the genus Natronorubrum, with sequence similarities to the type strains of Natronorubrum bangense, Natronorubrum tibetense and Natronorubrum aibiense of 97.1, 95.9 and 96.1%, respectively. The G + C content of its DNA was 60.9 mol% (Tm). Levels of DNA-DNA relatedness between strain AD2T and the type strains of Nrr. bangense, Nrr. tibetense and Nrr. aibiense were 49, 38 and 41%, respectively. It was concluded that strain AD2T represents a novel species of the genus Natronorubrum, for which the name Natronorubrum sulfiditaciens sp. nov. is proposed. The type strain is AD2T (=CGMCC 1.6307T=JCM 14089T).

Original languageAmerican English
Pages (from-to)738-740
Number of pages3
JournalInternational Journal of Systematic and Evolutionary Microbiology
Volume57
Issue number4
DOIs
StatePublished - Apr 2007

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