A PARTICIPATION OF WEAK-BOUND WITH PLANT CELL WALL PEROXIDASES IN RING ROT TOLERANCE OF WILD MEXICAN SPECIES AND CULTURAL VARIETIES OF POTATO M.A. <...> Voinikov1 1Siberian Research Institute of Plant Physiology and Biochemistry of Siberian Branch of the Russian Academy of Sciences, 132, ul. <...> Karla Marksa, Irkutsk, 664003 Russia, e-mail isupress@isu.ru Abstract It is known, the activities of pro-oxidant and anti-oxidant system enzymes in plant cells can be used as markers of pathogen tolerance. <...> These enzymes are catalase, NADFH-oxidase and especially peroxidase, which is spread in nature and has a broad spectrum of action. <...> We used the plants of potato Solanum bulbocastanum (genome ВВ or ApiApi), S. cardiophyllum (diploid, ВВ), S. polyadenium (genome ВВ or ApolApol), and also cultural varieties Lugovsky and Lukyanovsky in our research. <...> In experiment the plants were infected with strain 5369 Clavibacter michiganensis subsp. sepedonicus (Spieck. <...> Tolerance of potato wild species and Lugovsky variety to bacterial pathogen infection was substantially depended on weakbound with plant cell wall peroxidase activity. <...> The action of causative agent of ring rot activated the weak-associated with plant cell wall peroxidase and influenced upon spectrum of the ferment molecular forms. <...> The activity increase rate depends specifically on genotype and was the largest in pathogen-tolerant varieties and wild potato species. <...> Keywords: potato, weakly-bound with plant cell wall peroxidase, potatoes stability to pathogens. <...> Научные собрания НАУЧНО-ИНЖЕНЕРНАЯ ВЫСТАВКА «ПОЛИТЕХНИКА-2013» (10-12 октября 2013 года, г. Москва) Состоявшаяся в Московском государственном техническом университете МГТУ им. <...> Н.Э. Баумана молодежная научно-инженерная выставка, организованная при финансовой поддержке Министерства образования и науки Российской Федерации <...>