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A Gram-negative, aerobic, rod-shaped, motile, marine bacterium, strain AR11T, was isolated from Arctic marine sediment. Strain AR11T grew with 0.5–7 % NaCl and at 7–37 °C and pH 5.5–9.0. It utilized propionate, 3-hydroxybenzoate, l-proline, acetate, d- and l-lactate, l-alanine, malate and phenylacetic acid. Alkaline phosphatase, esterase lipase (C8), leucine arylamidase and acid phosphatase activity tests were positive. Acid was produced from 5-ketogluconate and aesculin. Strain AR11T possessed C16 : 0 (22.0 %), summed feature 4 (C16 : 1 ω7c and/or iso-C15 : 0 2-OH; 28.1 %) and summed feature 7 (one or more of C18 : 1 ω7c, ω9t and ω12t; 34.0 %) as the major cellular fatty acids. The major ubiquinone was Q-8. Comparative 16S rRNA gene sequence studies showed that strain AR11T belonged to the Gammaproteobacteria and was most closely related to Marinobacterium stanieri DSM 7027T, Marinobacterium halophilum mano11T and Marinobacterium georgiense KW-40T (97.8, 97.0 and 96.7 % similarity, respectively). The G+C content of the genomic DNA of strain AR11T was 57.9 mol%. DNA–DNA relatedness data indicated that strain AR11T represented a distinct species that was separated from M. stanieri DSM 7027T, M. halophilum KCTC 12240T and M. georgiense JCM 21667T. On the basis of evidence from this polyphasic study, it is proposed that strain AR11T (=KCTC 22254T=JCM 15134T) represents the type strain of a novel species, Marinobacterium maritimum sp. nov.
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International Journal of Systematic and Evolutionary Microbiology vol. 59 , part 12, pp. 3030 - 3034
Supplementary Fig S1. Phylogenetic relationships of isolate AR11 Tand some related micro-organisms on the basis of 16S rRNA gene sequences. [PDF](62 KB)