Scytonema
Scytonema is a genus of filamentous cyanobacteria in the family Scytonemataceae. Species within this genus are characterized by long, threadlike trichomes surrounded by a thick mucilaginous sheath and often exhibit false branching. They are typically heterocystous, containing specialized nitrogen-fixing cells interspersed along the filament.
Morphology and physiology: The trichomes consist of cylindrical cells, with heterocysts periodically spaced to enable nitrogen
Habitat and distribution: Scytonema occurs in a wide range of environments, including freshwater, brackish waters, and
Ecology and significance: Through photosynthesis and nitrogen fixation, Scytonema contributes organic nitrogen and primary production in
Taxonomy and relationships: The genus belongs to the family Scytonemataceae, order Nostocales, within the cyanobacteria. It