[Ultrafine structure of Lpp-1 cyanophage-infected Plectonema boryanum cells].

The interaction of the cyanophage Lpp-1 with the trychomous blue-green alga Plectonema boryanum was studied. The stage of formation and maturation of phage particles was found to be preceded with the production of the DNA-phage pool similar in its morphology with that in trychomous bacteria of the order Caryophanales. Phagolysis of Pl. boryanum cells infected with the phage involved, apart from typical changes in the cytoplast, some distortion in the structure of young, unfinished partitions.