ULTRASTRUCTURAL STUDIES ON LYSIS OF BLUE-GREEN ALGAE BY A BACTERIUM

Abstract
Bacteria which lyse blue-green algae were isolated from soil samples collected from Africa and Japan. The characteristics of one of these bacteria (bacterium MY-1) were investigated by EM. The bacterium was an aflagellate, gram-negative rod. The vegetative cells of Anabaena cylindrica were rapidly decomposed by the action of this bacterium MY-1 and only membranous materials, probably fragments of thylakoid, remained. The inner membranes of akinetes and heterocysts were also digested, leaving the outer membrane or envelope intact.

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