Anabaena circinalis - (Bacterium)
Order Nostocales
Azolla and Anabaena symbiosis
Family
Nostocaceae
Species
Anabaena circinalis
Description

The Anabaena circinalis is a Gram-negative bacterium (Worldwide). The effect of the bacteria on plants is Nitrogen fixation. no disease
 is caused by this bacteria. The following plant species are associated with the bacteria:

  • Azolla caroliniana
  • Azolla filiculoides
  • Azolla mexicana
  • Azolla pinnata