Living Organisms / Monera (Bacteria) / Bacteria with Gram negative staining cell-walls / Genus:

Bacterial genera and types to have Wildpro links
Morphology and Staining
Genera "type species"

Bacterial Species to have Wildpro links

Members of this genus are cyanobacteria ("blue-green alga" - oxygenic photosynthetic bacteria) and have been recorded as as cause of Blue-green Algal toxicosis due to pronounced growth "water bloom" (particularly when the water is fertile and there is accelerated eutrophication) and the release of either hepatotoxins or neurotoxins (Blue-Green Algae Toxins)(B15). Some cyanobacteria may become buoyant in certain conditions and form dense floating mats on the water surface.

Information on the cyanobacteria is held only at Genus level.

Oscillatoria species have a worldwide distribution in fresh-water, marine, and brackish waters. They also occur in inland saline lakes, and a few species tolerate temperatures up to 56-60C. Some species are mat-formers in streams and a number are planktonic in freshwater and warmer marine waters. A few species occur in terrestrial habitats subjected severe drying or in a shallow ephemeral freshwater in polar regions where freeze-drying accompanies winter. (B76) Oscillatoria species have been associated with toxic blooms. (B15)

Return to Top of Page

Morphology and Staining

Shape Filamentous organisms - trichomes (chains of connected cells) are straight to loosely sinuous near the apices; flexible or semi-rigid with transverse septae. Constrictions may or may not occur at cross-walls. Colour is variable (Bright blue-green to deep red to almost black). (B76) (B79)
Heterocysts This genera are considered members of the order Oscillatoriales which all filamentous cyanobacteria that only produce vegetative cells. They do not produce Heterocysts (non-photosynthetic cells that fix nitrogen) or akinetes (resting cells that later reproduce). (B76) (B79)
Staining Gram-negative. (B76)
Size Trichome is 1.0 - 100+ micometres in diameter. (B76)
Toxin formation Production of hepatotoxins and neurotoxins has been observed in some species of this genera. (B15)
Metabolism "Photosynthesise - convert solar energy and Carbon dioxide to food and other energy types." (B76) (B79)

Return to Top of Page

Genera "Type Species"

  • Oscillatoria princeps (B79)

Return to Top of Page

Primary References at the level of this taxa

Genus Author

Suzanne Boardman
B79 Lynn Margulis and Karlene V Schwartz
Five Kingdoms - An Illustrated Guide to the Phyla of Life on Earth, 3rd Edition
B76 Noel R Krieg and John G Holt
Bergey's Manual of Systematic Bacteriology - Volume 3
B15 G.A. Wobeser
Diseases of Wild Waterfowl Second Edition

Return to Top of Page