Effects of Cyanophage SAM-1Upon 'Microcystis aeruginosa'.

摘要

Cyanophage SAM-1,which infects Synechoccus cedrorum, Anacystis nidulans and certain strains of Microcystis aeruginosa has been isolated from sewage. The host range of cyanophage SAM-1differs from those of other reported cyanophages. Phage SAM-1stocks are rapidly inactivated at temperatures above 45 C or at pH values below 4or above 10. The simultaneous application of chloroform and of agitation reduces viral infectivity to 20% of the original infectivity. The SAM-1multiplication cycle has a latent period of 10hours, a rise period of an additional 6hours,and eclipse period of 6hours,and an average burst size of 90plaque-forming units per infected cell. Electron micrographs show SAM-1 virions consisting of polyhedral head and a contractile tail with a distinctive terminal structure. The properties of cyanophage SAM-1are compared with those of other cyanophages.