The cyanobiont in an Azolla fern is neither Anabaena nor Nostoc.
The cyanobacterial symbionts in the fern Azolla have generally been ascribed to either the Anabaena or Nostoc genera. By using comparisons of the sequences of the phycocyanin intergenic spacer and a fragment of the 16S rRNA, we found that the cyanobiont from an Azolla belongs to neither of these genera.
Baker
Judith A
JA
Molecular and Cellular Biology, University of New England, Armidale, NSW 2351, Australia.
Entsch
Barrie
B
McKay
David B
DB
D000595:Amino Acid Sequence; D017033:Anabaena / Q000235:genetics; D017124:Conserved Sequence; D000458:Cyanobacteria / Q000235:genetics*; D029624:Ferns / Q000382:microbiology*; D008969:Molecular Sequence Data; D009586:Nitrogen Fixation; D010798:Phycocyanin / Q000235:genetics; D010802:Phylogeny; D013559:Symbiosis
D010798:Phycocyanin