1887

Abstract

A Gram-staining-positive, aerobic, motile, rod-shaped (0.4–0.5×2.0–4.0 µm), endospore-forming bacterium, designated strain NIOT.bflm.S4, was isolated from biofilm formed on high-density polyethylene test coupons in coastal seawater. The strain required seawater for growth. It grew with 1.0–8.0 % (w/v) NaCl, at 4–45 °C and at pH 6.5–9.0, with optimum growth with 4.0–5.0 % (w/v) NaCl, at 30 °C and at pH 7.0–8.0. Phylogenetic analyses based on 16S rRNA and partial gene sequences showed that strain NIOT.bflm.S4 formed a phylogenetic lineage with P-207, the only known species of the genus and shared sequence identities of 96.9 and 83 %, respectively, with this strain. The identities of 16S rRNA and partial gene sequences with members of other related genera such as , , , , and were ≤95 and ≤78 %, respectively. The DNA G+C content of strain NIOT.bflm.S4 was 39.1 mol%. MK-7 was found as the sole isoprenoid quinone. The major polar lipids of strain NIOT.bflm.S4 were diphosphatidylglycerol, phosphatidylethanolamine and an unknown lipid. The diagnostic diamino acid of the cell-wall peptidoglycan was -diaminopimelic acid. Major cellular fatty acids were anteiso-C (27.9 %), anteiso-C (18.6 %), C (8.7 %) and iso-C (6.6 %). On the basis of phenotypic, phylogenetic and chemotaxonomic results, we propose that the isolate represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is NIOT.bflm.S4 (=KACC 18456=MTCC 12376=TBRC 5831).

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2016-09-01
2024-03-19
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