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. 2018 Oct;200(8):1183-1189.
doi: 10.1007/s00203-018-1539-6. Epub 2018 Jun 7.

Pseudoruegeria Litorisediminis Sp. Nov., a Novel Lipolytic Bacterium of the Family Rhodobacteraceae Isolated From a Tidal Flat

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Pseudoruegeria Litorisediminis Sp. Nov., a Novel Lipolytic Bacterium of the Family Rhodobacteraceae Isolated From a Tidal Flat

Sooyeon Park et al. Arch Microbiol. .

Abstract

A lipolytic bacterial strain, designated BPTF-M5T, was isolated from a tidal flat sediment of the Yellow Sea in Republic of Korea, and identified by a polyphasic taxonomic approach. It was Gram negative, aerobic, non-motile and rod shaped. Strain BPTF-M5T grew optimally at 30 °C and in the presence of 2.0-3.0% (w/v) NaCl. A neighbour-joining phylogenetic tree of 16S rRNA gene sequences showed that strain BPTF-M5T fell within the clade comprising the type strains of Pseudoruegeria species. The novel strain exhibited the highest 16S rRNA gene sequence similarity value (98.6%) to Pseudoruegeria marinistellae SF-16T. Strain BPTF-M5T exhibited sequence similarities of 97.0-98.5% to the type strains of five other Pseudoruegeria species and of less than 96.1% to other recognized species. Strain BPTF-M5T contained Q-10 as the predominant ubiquinone and C18:1 ω7c as the major fatty acid. Phosphatidylglycerol, one unidentified aminolipid, one unidentified lipid and one unidentified glycolipid were detected as major polar lipids in the novel strain. The DNA G + C content of strain BPTF-M5T was 63.3 mol%. DNA-DNA relatedness values between strain BPTF-M5T and the type strains of the six Pseudoruegeria species were 11.0-24.3%. The phenotypic properties of strain BPTF-M5T were clearly distinguished from those of the type strains of the six Pseudoruegeria species. Based on the polyphasic data presented, strain BPTF-M5T represents a novel species of the genus Pseudoruegeria, for which the name Pseudoruegeria litorisediminis sp. nov. is proposed. The type strain is BPTF-M5T (= KCTC 62420T = KACC 19613T = NBRC 113189T).

Keywords: Novel species; Polyphasic taxonomy; Pseudoruegeria litorisediminis; Tidal flat.

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