1887

Abstract

A novel Gram-stain-negative, moderately halophilic, motile, facultatively anaerobic and rod-shaped strain, designated WDN1C137, was isolated from a marine saltern at Wendeng, PR China. Optimal growth occurred at 40 °C, pH 7.5 and with 7.0 % (w/v) NaCl. Q-10 was the sole respiratory quinone. The major cellular fatty acids (>10.0 %) in WDN1C137 were C18 : 1ω7c (46.2 %), cyclo C19 : 0ω8c (18.7 %) and C16 : 0 (12.3 %). The major polar lipids were phosphatidylglycerol, phosphoglycolipid, phosphatidylcholine, one unidentified glycolipid, one unidentified lipid, one unidentified aminolipid and two unidentified phospholipids. The genomic DNA G+C content was 70.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that WDN1C137 shared the highest similarity (94.5 %) to Roseivivax jejudonensis KCTC 42110, followed by Roseivivax halodurans JCM 10272 (94.2 %) and Roseivivax roseus DSM 23042 (94.1 %). WDN1C137 formed a separate branch from the closely related genera Roseivivax , Loktanella , Paracoccus and Cribrihabitans within the family Rhodobacteraceae , which indicated that it represented a novel genus in the phylogenetic tree. On the basis of the data from the current polyphasic study, the isolate is proposed to represent a novel species of a novel genus within the family Rhodobacteraceae , with the name Rhodosalinus sediminis gen. nov., sp. nov. The type strain of the type species is WDN1C137 (=KCTC 52478=MCCC 1H00170).

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2017-10-18
2019-10-20
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