Marinobacter nitratireducens sp. nov., a halophilic and lipolytic bacterium isolated from coastal surface sea water.

Vaidya, Bhumika and Kumar, Ravinder and Korpole, Suresh and Tanuku, Naga Radha Srinivas and Pinnaka, Anil Kumar (2015) Marinobacter nitratireducens sp. nov., a halophilic and lipolytic bacterium isolated from coastal surface sea water. International journal of systematic and evolutionary microbiology, 65 (7). pp. 2056-63. ISSN 1466-5034

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A novel Gram-stain-negative, rod-shaped, motile bacterium, designated strain AK21(T), was isolated from coastal surface sea water at Visakhapatnam, India. The strain was positive for oxidase, catalase, lipase, L-proline arylamidase and tyrosine arylamidase activities. The predominant fatty acids were C12:0, C12:0 3-OH, C16:0, C16:1ω9c, C18:1ω9c and summed feature 3 (C16:1ω7c and/or iso-C15:0 2-OH). The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, one unidentified aminophospholipid, two unidentified phospholipids and one unidentified lipid. Q-10 was the predominant respiratory quinone. The DNA G+C content of the strain was 54.6 mol%. 16S rRNA gene sequence analysis indicated that strain AK21(T) was a member of the genus Marinobacter and was closely related to Marinobacter xestospongiae, with pairwise sequence similarity of 97.2% to the type strain, with similarity to other members of the genus of 94.0-96.8%. The mean DNA-DNA relatedness of strain AK21(T) with M. xestospongiae JCM 17469(T) was 34.5%, and relatedness with Marinobacter mobilis JCM 15154(T) was 40.5%. Phylogenetic analysis showed that strain AK21(T) clustered with the type strains of M. xestospongiae and M. mobilis at distances of 2.9 and 2.8% (97.1 and 97.2% similarity), respectively. Based on the phenotypic characteristics and on phylogenetic inference, it appears that strain AK21(T) represents a novel species of the genus Marinobacter, for which the name Marinobacter nitratireducens sp. nov. is proposed. The type strain of Marinobacter nitratireducens is AK21(T) ( = MTCC 11704(T ) = JCM 18428(T)).

Item Type: Article
Additional Information: Copyright of this article belongs to Microbiology Society.
Uncontrolled Keywords: NEW TAXA - Proteobacteria
Subjects: Q Science > QR Microbiology
Depositing User: Dr. K.P.S.Sengar
Date Deposited: 28 Jan 2016 09:31
Last Modified: 28 Jan 2016 09:31

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