1887

Abstract

Summary: Oersted is a common marine epiphyte, probably ubiquitous on shores around the world. The long, unbranched filaments, which are usually attached to algae, taper somewhat from 2 μm wide at the base to less than 1 μm wide at the distal end. Asexual reproduction is effected by the abstriction and detachment of terminal segments or single cells, which are capable of slow gliding on solid substrates until they re-attach. In liquid cultures, rosettes of shorter filaments are commonly formed. Although apochlorotic, and presumably an obligate heterotroph, shows certain resemblances to blue-green algae such as . Unlike , however, it apparently lacks heterocysts. In spite of this, its possible affinity with blue-green algae suggested that might be able to fix N. This was tested by the acetylene reduction assay for nitrogenase activity (Stewart, Fitzgerald & Burris, 1967).

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-85-2-365
1974-12-01
2021-10-27
Loading full text...

Full text loading...

/deliver/fulltext/micro/85/2/mic-85-2-365.html?itemId=/content/journal/micro/10.1099/00221287-85-2-365&mimeType=html&fmt=ahah

References

  1. Drozd J., Postgate J. R. 1970; Effects of oxygen on acetylene reduction, cytochrome content and respiratory activity of Azotobacter chroococcum. Journal of General Microbiology 63:63–73
    [Google Scholar]
  2. Lewin R. A. 1959; Leucothrix mucor. Biological Bulletin 117:418
    [Google Scholar]
  3. Millbank J. W. 1970; The effect of conditions of low oxygen tension on the assay of nitrogenase in moulds and yeasts using the acetylene reduction technique. Archiv fur Mikrobiologie 73:375–377
    [Google Scholar]
  4. Rippka R., Neilson A., Kunisawa R., Cohen-Bazire G. 1971; Nitrogen fixation by unicellular blue-green algae. Archiv fur Mikrobiologie 76:341–348
    [Google Scholar]
  5. Stewart W. D. P., Fitzgerald G. P., Burris R. H. 1967; In situ studies on N2 fixation using the acetylene reduction technique. Proceedings of the National Academy of Sciences of the United States of America 58:2071–2078
    [Google Scholar]
  6. Stewart W. D. P., Lex M. 1970; Nitrogenase activity in the blue-green alga Plectonema boryanum strain 594. Archiv fur Mikrobiologie 73:250–260
    [Google Scholar]
  7. Wan A., Floyd K. 1974; Organic nitrogen utilization by unicellular blue-green bacteria. American Society for Microbiology (Abstracts of meetings) p. 2
    [Google Scholar]
  8. Wyatt J. W., Silvey J. K. G. 1969; Nitrogen fixation by Gloeocapsa. Science, New York 165:908–909
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-85-2-365
Loading

Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error