Study on the Bacteriocin from Three Pathogenic Bacteria

The bacteriocin productivity of Xanthomonas camperstris pv.oryzicola, Xanthomonas camperstris pv.oryzae and Xanthomonas camperstris pv.citri, that totally have 92 strains from different places, was detected by double-layer medium method.The results showed that 34 strains produced bacteriocin, occupies 37% of the total strains.Among the bacteriocin-producing strains, crossinhibition reaction was observed in 4 different species.The diameter of inhibition zones varied from 2-6mm.The inhibition ability of bacteriocin-producing strains to the same species was better than that to different species.