Different defense pathways in plants evolved in reaction to pathogens. The main aim of this study was to investigate the mechanism of action of glyphosate in resistance induction to bacterial phytopathogens. To do so, glyphosate at an optimal concentration of 1.8 mg / l was used on transgenic potato, to induce resistance to two strains of pathogenic bacteria (21A of Pectobacterium atrosepticum and ENA49 of Dickeya dadantii). It was been shown that plant defense responses to pathogens can be stimulated by treatment plants at an optimal concentration of glyphosate. Transgenic potato leaves infected with potato pathogenic bacteria, and then treated with glyphosate showed a high level of expression of pathogenesis-related genes (PR-2, PR-3, PR-5), especially PR-2 gene and defense response genes (HSR-203j, HIN1), especially HSR-203j gene. The expression of PR-2 gene in leaves infected with these two bacteria were 1.5 and 2.9 times, for PR-3 gene 1.7 and 1.7 times, for PR-5 gene to 1.3 and 1.5 times and expression of HSR-203J gene to 2.5 and 2.4 times and - HIN1 gene to 1.7 and 1.7 times, with Dickeya dadantii and Pectobacterium atrosepticum infection, respectively. The expression of these genes in control samples didn’t significantly change. The results showed that there was a significant difference between the expression of genes in the experimental and control samples (plants treated by glyphosate compared to untreated plants). The results showed that the treatment of plants by glyphosate can induce a systemic acquired resistance to phytopathogens by inducing proteins and defense response genes.

Keywords: Plant bacterial pathogens, Pathogenesis related genes and defense response genes, Glyphosate, Induced resistance

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