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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.[1]

Nostoc punctiforme
Scientific classification
Kingdom: Bacteria
Phylum: Cyanobacteria
Class: see proposal
Order: Nostocales
Family: Nostocaceae
Genus: Nostoc
Species: N. punctiforme
Binomial name
Nostoc punctiforme

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.[2]


  1. ^ 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. 
  2. ^ Meeks, JC (1998). "Symbiosis between Nitrogen-Fixing Cyanobacteria and Plants". BioScience. 48 (4): 266–276. doi:10.2307/1313353. JSTOR 1313353. 

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