[Synthesis of surfactants by Pseudomonas syringae pv. coronafaciens and Psedomonas syringae pv. atrofaciens strains].

Pseudomonas syringae pv. coronafaciens, P. syringae pv. atrofaciens and P. syringae pv syringae strains produce very weakly biosurfactants in comparison with P. fluorescens 8573. It is detected, that supernatant of cultural fluid of P. fluorescens has a surface-tension 27 microN/m and emulsification index--50%; for phytopathogenic pseudomonads these parameters are 50-54 microN/m and 0.8-1.3%, accordingly. The coronafaciens and atrofaciens pathovars strains do not differ between themselves in ability to synthesize the surfactants. The surfactant synthesis by P. syringae strains does not correlate with their belonging to pathovars, their aggressiveness, antigenic composition and ecological origin.