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Nisaea denitrificans gen. nov., sp. nov. and Nisaea nitritireducens sp. nov., two novel members of the class Alphaproteobacteria from the Mediterranean Sea
Urios, L.; Michotey, V.; Intertaglia, L.; Lesongeur, F.; Lebaron, P. (2008). Nisaea denitrificans gen. nov., sp. nov. and Nisaea nitritireducens sp. nov., two novel members of the class Alphaproteobacteria from the Mediterranean Sea. Int. J. Syst. Evol. Microbiol. 58: 2336-2341
In: International Journal of Systematic and Evolutionary Microbiology. Society for General Microbiology: Reading. ISSN 1466-5026, more
Peer reviewed article  

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  • Urios, L.
  • Michotey, V.
  • Intertaglia, L.
  • Lesongeur, F.
  • Lebaron, P., more

Abstract
    Two novel Gram-negative bacteria, designated strains DR41_21T and DR41_18T, were isolated from coastal, surface waters of the north-western Mediterranean Sea. The cells were motile, pleomorphic rods, 2.9 µm long and 0.9 µm wide and formed cream colonies on marine agar medium. The G+C content of the genomic DNA was 60 mol%. Phylogenetic analysis of 16S rRNA gene sequences positioned the isolates in the class Alphaproteobacteria within the family Rhodospirillaceae. The 16S rRNA gene sequence similarity of the two strains was 98.8 % but DNA–DNA hybridization indicated only 55 % relatedness. Strain DR41_21T was able to denitrify and possessed nirK and nosZ genes, unlike strain DR41_18T, which possessed only nirK. These isolates represent two novel species of a new genus, Nisaea gen. nov., for which the names Nisaea denitrificans sp. nov. and Nisaea nitritireducens sp. nov. are proposed. The type strain of Nisaea denitrificans is DR41_21T (=DSM 18348T=CIP 109265T=OOB 129T) and the type strain of Nisaea nitritireducens is DR41_18T (=DSM 19540T=CIP 109601T=OOB 128T).


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