Detection of Plantaricin Genes in Strains of Lactobacillus Plantarum – Antagonists of Phytopathogenic Bacteria

Abstract

Lactobacillus plantarum bacteria isolated from plant surfaces and dairy products are characterized by the clear antagonistic activity against some phytopathogens [4]. The ability of L. plantarum to inhibit bacteria and fungi is strain-specific [15].Antagonistic activity of lactobacilli is the result of the effects of organic acids, hydrogen peroxide, microbial competition and bacteriocin synthesis [14,16]. Although the bacteriocin action is described in details only as an effect on gram-positive bacteria, the cases of inhibition of gram-negative bacteria are also known in literature [12,13]. This makes lactobacilli especially perspective for plant protection as the majority of phytopathogens are the gram-negative bacteria.In our previous investigation, the use of Lactobacillus plantarum ОNU 87, Lactobacillus plantarum ОNU 206 and Lactobacillus plantarum ОNU 991 strains in plant protection on a model of Kalanchoe daigremontiana Mill. was described. Not only the supernatants with low pH but also the supernatant of L. plantarum ONU 206 culture