In this article we will discuss about:- 1. Discovery of Cyanophages 2. Morphology of Cyanophages 3. Replication. Discovery of Cyanophages: Cyanophages are the phages (Fig. 13.14) that attack cyanobacteria. Cyanophages were first discovered by Safferman and Morris (1963) from a waste stabilization pond of Indiana University (USA). The first cyanophage studied by Safferman and Morris was the cyanophage attacking Lyngbya, [...]
In this article we will discuss about the classification and morphological groups of bacteriophages. Classification of Bacteriophages: On the basis of presence of single or double strands of genetic material, the bacteriophages are categorized as under: 1. The ssDNA Bacteriophages: (i) Icosahedral phages = φx 174, St-1, φR, BR2, 6SR U3 and G series, e.g., G4, G6, G13, G16. All [...]
In this article we will discuss about the infection cycles of lytic, single-stranded and temperate bacteriophages. Infection Cycle of Lytic Bacteriophages: The lytic cycle of these bacteriophages can be divided into several stages, like attachment and adsorption, penetration, intercellular changes resulting in the synthesis of viral components, assembly of progeny virions and release from the infected cell. These steps are [...]