VIRION MORPHOLOGY AND STRUCTURAL ORGANIZATION OF POLYVALENT BACTERIOPHAGES TT10-27 AND KEY.

Fine ultrastructure of polyvalent bacteriophages TT10-27 and KEY isolated from affected with fire blight disease plant tissues, was studied using electron microscopy. Phages have isometric heads connected to short complex tail (TT10-27, C1-morphotype) or long non-contractile tail (KEY B-1 morphotype). Maximum diameter of TT10-27 head, measured as the distance between opposite vertices, is 71.

Temperate bacteriophages collected by outer membrane vesicles in Komagataeibacter intermedius.

The acetic acid bacteria have mainly relevance for bacterial cellulose production and fermented bio-products manufacture. The purpose of this study was to identify temperate bacteriophages in a cellulose-producing bacterial strain Komagataeibacter intermedius IMBG180. Prophages from K.

Exclusion of polyvalent T7-like phages by prophage elements.

The study presents new insights into the process of interaction of T7-like bacteriophages FE44 and BA14 with lysogenic cells. It was demonstrated that single and double lysogens possess Abiphenotype regardless of genera, species and strain of bacteria that initially had normal phage sensitivity. Efficiency of plating of these phages is reduced by two orders of magnitude on monolysogens, whereas it decreases by 4-6 orders on bilysogens.

Phytopathogenic bacteria phenotype conversion as a result of their lysogenisation by coliphage P1.

A set of lysogenic strains of phytopathogenic bacteria Erwinia "horticola" and Erwinia amylovora associated with woody plants was obtained using bacteriophage P1 Cmc1ts100. The phenotype conversion from Cm(S) to Cm(R) was shown to be connected with introducing of authentic prophage DNA of 94.8 kb as a single-copy plasmid into the cells.

[Electron microscopy and restriction analysis of bacteriophages isolated from quince and pear with symptoms of fire blight].

Phage populations of isolates from quince and pear affected with fire blight disease were studied using electron microscopy, restriction analysis and both agarose gel electrophoresis of particles and host range scoping method. The isolate from quince (pMA1) comprises at least three phage populations and two phage variants that can be detected on different bacterial indicators. After titration of this isolate on Erwinia amylovora the bacteriophage KEY of B1 morphotype with the genome size of 82.

[Polyvalence of bacteriophages isolated from fruit trees, affected by bacterial fire blight].

Phage populations appearing as a result of a pathogenic process caused by Erwinia amylovora have been discovered and described. They accompany bacterial fire blight development in the process of quince, pear and apple trees vegetation in Zakarpattya region of Ukraine. Phage isolates of the affected pear and quince include polyvalent virulent phages able to develop on bacterial strains associated with plants--E.