title: Variability of nitrogen fixation in some isolates of Nostoc linckia.
abstract: Four clonal isolates of Nostoc linckia isolated from different localities were compared with respect to growth, nitrogen content (cellular and extracellular), and pigment composition. A considerable range of variation was observed among these isolates. This indicates the existence of genetically distinct clonal populations of the alga in natural habitats.
mesh_terms: D002338:Carotenoids / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D002999:Clone Cells / Q000378:metabolism; D000458:Cyanobacteria / Q000145:classification / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D010798:Phycocyanin / Q000378:metabolism
chemical_list: D010798:Phycocyanin; D002734:Chlorophyll; D002338:Carotenoids; D009584:Nitrogen