→ Cyanobacteria
⇒ Importance of Cyanobacteria have the ability of
∙ Several cyanobacteria have the ability of
N2 fixation. The filamentous forms fosses
Special large fale cells or heteracysts for this
∙ some of dhe fixed nitrogen comes out as Excellion
∙ After death of Cyanobacteria the substratum
becomes rich in nitrogen
∙ N2 fixing cyanobacteria are often used for
reclaiming user soils.