SUM MARVThe main morphological and physiological characters of several symbiotic cyanobacterial strains, isolated from different plant-cyanobacteria associations {Anthoceros, Azalla, cycads and Gunnerd) were investigated. All the strains showed heterocystous immotile filaments and motile hormogonia, typical of the genus Nostoc. In accordance with their symbiotic origin, all were found capable of photoheterotrophic growtb. On the basis of the morphological and physiological properties and tbe phycobiliprotein content, the isolates from Asolla appeared very close to eacb otber and quite distinct from tbe otber cyanobionts. The latter sbowed many characteristics in common, sucb as marked tendency to produce bormogonia, synthesis of C-pbycoerytbrin and ratber small dimensions of the akinetes. With regard to the cycad cyanobionts, there vias no coTre\atwn between the properties of the isolates and tbe bast plants.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.