A participation of weak-bound with plant cell wall peroxidases in ring rot tolerance of wild Mexican species and cultural varieties of potato

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 A piA pi), S. cardiophyllum (diploid, ВВ), S. polyadenium (genome ВВ or A polA pol), and also cultural varieties Lugovsky and Lukyanovsky in our research. The plants were grown from cuttings at MS agar medium with addition of hormones and vitamins. In experiment the plants were infected with strain 5369 Clavibacter michiganensis subsp. sepedonicus (Spieck. Et Kott.) Skapt et Burkh as a ring rot agent. Tolerance of potato wild species and Lugovsky variety to bacterial pathogen infection was substantially depended on weak-bound 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.