Generation of hydrogen peroxide in potato plants and potato cell cultures under their infection with <i>Pectobacterium carotovorum </i>ssp. <i>сarotovorum</i>
In this research, we investigated changes in the concentration of hydrogen peroxide in the potato plants and their cell cultures (Solanum tuberosum L.) of two varieties - Lugovskoy and Lukyanovsky - under the action of the necrotrophic bacterial phytopathogen Pectobacterium carotovorum ssp. сarotovorum (Pcc) and its exometabolites (filtrate devoid of bacterial cells and thermally inactivated bacterial suspension). A biphasic accumulation of hydrogen peroxide is shown to occur in the cell cultures of the potato varieties under investigation infected with Pcc It is established that a thermally inactivated Pcc culture affects both the cell cultures and plant roots of the plants under study by causing a significant change in the generation of hydrogen peroxide in comparison with a filtrate devoid of bacterial cells. When infected with pathogens and their exometabolites, the intensity and dynamics of changes in hydrogen peroxide in the potato plants is significantly higher compared to a suspension cell culture. The intensity and dynamics of changes in the generation of hydrogen peroxide indicate the development of a systemic induced resistance in the studied potato varieties to Pcc bacteria and their exometabolites.