Trichormus variabilis ARAD Genome sequencing and assembly. Trichormus variabilis ARAD

Anabaena variabilis ARAD is a photosynthetic, nitrogen-fixing cyanobacterium that was isolated as a possible cyanobiont from the fresh-water fern Azolla filiculoides. This free-living, filamentous strain forms heterocysts in the absence of combined nitrogen and fixes nitrogen using one of three nitrogenase systems, Nif1, Nif2, or Vnf. A. variabilis ARAD is chemoheterotrophic and can use sugars as a carbon source. A. variabilis ARAD is nearly identical to A. variabilis ATCC 29413 (NCBI:txid240292), a free-living strain that is capable of infecting the liverwort Blasia.