EVALUATION OF THE INHIBITORY ACTIVITY OF COLLECTION YEAST CULTURES AGAINST THE CAUSATIVE AGENT OF BACTERIAL BURN ERWINIA AMYLOVORA

Abstract

The article presents the results of screening of collection yeast cultures for antagonistic activity against the causative agent of bacterial burn Erwinia amylovora. Of the 36 yeast strains studied, only 4 cultures had inhibitory activity. These are Torulopsis kefir var kumis №114 3, Kluyveromyces marxianus 19, Torulopsis sphaerica №117, Saccharomyces cerevisiae (vini) 2 complex №20. Their pathogen growth suppression zones were (22, 23.5, 22.5 and 26 mm), respectively. The greatest antagonistic activity was in the yeast strain Saccharomyces cerevisiae (vini) 2 complex №20. The analysis of the component composition of 4 yeast cultures (Torulopsis kefyr var.kumis №114 3, Kluyveromyces marxianus 19, Torulopsis sphaerica №117, Saccharomyces cerevisiae (vini) 2 complex №20) showed that 13 chemical compounds were detected in cultures of Saccharomyces cerevisiae (vini) 2 complex №20 and Torulopsis sphaerica №117, of which the main compound is Phenylethyl alcohol. Their percentage is 43.1%, respectively. The culture of Torulopsis kefyr var.kumis №114 has 12 chemical compounds, of which the main compound is 1-Butanol, 3-methyl - 15.7%.And the Kluyveromyces marxianus culture has 19 10 compounds, the main compound Ethyl Acetate is 12.24%.

The data obtained indicate that the studied yeast cultures are of interest for further study of them as agents of biocontrol against the causative agent of bacterial burn E. amylovora.