Marinobacterium

Abstract

Ma.ri.no.bac.te'ri.um. L. masc. adj. marinus of the sea; Gr. neut. n. bakterion a small rod; N.L. neut. n. Marinobacterium small marine rod. Proteobacteria / Gammaproteobacteria / Oceanospirillales / Oceanospirillaceae / Marinobacterium The genus includes slightly halophilic organisms isolated from the marine environment and oil reservoirs. Cells stain Gram‐negative and are chemoheterotrophic, aerobic, or facultatively anaerobic, with some members capable of nitrate reduction. Motile by one or two polar flagella, rod‐shaped. Reproduces by binary cell division. The cytoplasm contains intracellular poly‐β‐hydroxybutyrate granules. Members typically enriched from marine samples or brine oil reservoirs using simple organic, such as l ‐leucine or n ‐propanol, or aromatic compounds (e.g., benzene) or isolated directly from seawater on a standard nutrient replete marine medium (Marine Agar 2216). Some members are capable of atmospheric nitrogen fixation under reduced oxygen tension. Strains are mesophilic and require NaCl for growth. The major fatty acid is C 18:1 ω7 c . DNA G + C content, determined from available genome sequences, ranges between 54.9 and 58.8%. These organisms thrive in marine habitats and oil brines; are common in both pristine and contaminated systems; found in marine water columns, sediments, tidal flats, and coastal rhizospheres; and in association with marine animals. DNA G + C content (mol%) : 56.71 (genome). Type species : Marinobacterium georgiense Gonzales et al. 1997 VP . This species is a later heterotypic synonym of Marinobacterium iners Tindall 2019, VL191 (basonym: Pseudomonas iners Iizuka and Komagata 1964 AL emend. Satomi et al. 2002).