Up-to-date methods for isolation of cyanobacteria from soil samples, removal of accompanying microflora, obtaining axenic strains, and conditions and media for subsequent cultivation are reviewed. Characterization of soil as a specific habitat for cyanobacteria is provided. Comparative analysis of pH and elemental composition of the liquid phase of most soil types with the media for cultivating cyanobacteria is carried out. The functional role of the major components required for the cultivation of cyanobacteria is described. The problems associated with isolation, purification, and cultivation of soil cyanobacteria, as well as the relevant solutions, are discussed.

— Polyphyletic nature of three genera of green microalgae, Chlorococcum, Deasonia, and Neospongiococcum, was confirmed . Some Chlorococcum species, together with the type species C. infusionum...