Nostoc. This genera of cyanobacteria are typically terrestrially-associated and are especially found in limestone or nutrient-poor soils. They are very similar to
Anabaena spp. and historically they have been distinguished on the basis of morphological and life cycle characteristics.
Nostoc spp. can grow heterotrophically
More...or photoheterotrophically, and form heterocysts for nitrogen fixation. Nostoc punctiforme. This organism can form nitrogen-fixing symbiotic relationships with plants and fungi such as the bryophyte Anthoceros punctatus. The relationship is relatively simple as compared to the Rhizobial symbiotic relationship. In the presence of the plant, hormogonia (short motile filaments) infect the plant, and then form long heterocyst-containing (nitrogen-fixing differentiated bacterial cells) filaments. The bacterial cell receives carbon sources in exchange for fixed nitrogen. Less...
Reference genome: -
Nostoc punctiforme PCC 73102
Submitter: US DOE Joint Genome Institute Morphology: Shape:Filamentous, Motility:Yes Environment: OxygenReq:Aerobic, Habitat:Multiple
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