Archives of Microbiology

, Volume 155, Issue 2, pp 137–142 | Cite as

Aquabacter spiritensis, gen. nov., sp. nov. an aerobic, gas-vacuolate aquatic bacterium

  • Roar L. Irgens
  • Karel Kersters
  • Paul Segers
  • Monique Gillis
  • James T. Staley
Original Papers


A gram-negative, rod-shaped, gas-vacuolate, aerobic, heterotrophic bacterium was isolated from Spirit Lake, Washington. It was further characterized by phase-contrast and electron microscopy and phenotypic tests. The isolate does not utilize carbohydrates. Deoxyribonucleic acid-ribosomal ribonucleic acid (rRNA) hybridizations showed that this bacterium is a member of rRNA superfamily IV where it occupies a separate position on the Azorhizobium caulinodans rRNA sub-branch which, is part of an rRNA cluster containing also the Beijerinckia, the Bradyrhizobium japonicum and the Rhodopseudomonas palustris sub-branches. Its relationship to other gas-vacuolated genera within rRNA superfamily IV is discussed. A new genus Aquabacter with one species Aquabacter spiritensis is proposed. The type strain is strain SPL-1 (=ATCC 43981=LMG 8611).

Key words

Aquabacter Aquatic bacterium Gas vacuoles 


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Roar L. Irgens
    • 1
  • Karel Kersters
    • 2
  • Paul Segers
    • 2
  • Monique Gillis
    • 2
  • James T. Staley
    • 3
  1. 1.Department of BiologySouthwest Missouri State UniversitySpringfieldUSA
  2. 2.Laboratorium voor Microbiologie, en microbiële GeneticaGentBelgium
  3. 3.Department of MicrobiologyUniversity of WashingtonSeattleUSA

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