Nostoc punctiforme is a species of filamentous cyanobacteria. Under non-limiting nutritional environmental conditions, its filaments are composed of photosynthetic vegetative cells; upon nutrient limitation, some of these cells undergo differentiation into heterocysts, akinetes or hormogonia.
N. punctiforme is one of the Nostoc strains able to maintain diazotrophic symbiosis with higher plants such as the bryophytes Anthocerus punctatus and Blasia pusilla, water ferns from the genus Azolla, the cycads Macrozamia spp., and the angiosperm Gunnera.
- Meeks, JC; EL Campbell; ML Summers; FC Wong (2002). "Cellular differentiation in the cyanobacterium Nostoc punctiforme". Arch Microbiol. 178 (6): 395–403. doi:10.1007/s00203-002-0476-5. Retrieved 11 December 2011.
- Meeks, JC (1998). "Symbiosis between Nitrogen-Fixing Cyanobacteria and Plants. They grow with the help of water". BioScience. 48 (4): 266–276. doi:10.2307/1313353. JSTOR 1313353.
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