Ecophysiological and phylogenetic studies of Nevskia ramosa in pure culture

  • Stürmeyer H
  • Overmann J
  • Babenzien H
 et al. 
  • 27


    Mendeley users who have this article in their library.
  • 33


    Citations of this article.


During the last 100 years, the neuston bacterium Nevskia ramosa has been described several times. This bacterium forms conspicuous rosette-like microcolonies at the air-water interface. In this study, pure cultures of Nevskia ramosa were obtained for the first time, from a bog lake (strain Soe1, DSMZ 11499T) and a freshwater ditch (strain OL1, DSMZ 11500). The isolates showed special adaptations to life in the epineuston. They formed hydrophobic surface films with a dull appearance. N. ramosa is sensitive to UV radiation but revealed a very effective photorepair mechanism. Exposure to light at a wavelength of 350 nm after UV treatment raised the number of surviving cells by several orders of magnitude. The isolates grew with a broad range of organic substrates. Surface films were formed only in the absence of combined nitrogen; however, nitrogenase activity was not detected. It appears that during growth at the air-water interface the cells benefit from trapping ammonia from the air. The G + C content of the DNA was 67.8 and 69.0 mol% for strains Soe1 and OL1, respectively. The slight difference was confirmed by enterobacterial repetitive intergenic consensus PCR. The 16S rRNA sequences revealed 99.2% similarity. Thus, both isolates belong to the same species. The phylogenetic analysis indicated that Nevskia is a member of the gamma-subclass Proteobacteria that has no known close relatives.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

  • ISSN: 00992240
  • PUI: 28234801
  • SGR: 0344505866
  • SCOPUS: 2-s2.0-0344505866
  • PMID: 9572968


  • Heike Stürmeyer

  • Jörg Overmann

  • Hans Dietrich Babenzien

  • Heribert Cypionka

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free