Yana Fabriciusa, Sochi, 354002 Russia, e-mail nkolem@mail.ru A b s t r a c t Because of pesticide pollution and violation of protective reactions in biosystems, the ways to increase a nonspecific natural resistance in plants is relevant. <...> For the recent decades the mechanisms of pathogens-to-plant cell interaction were revealed. <...> To identify chemical signals arising in the spots of plant infection by pathogenic microorganisms, the term «elicitor» was suggested (M. Yoshikawa et al., 1993; M. Thakur et al., 2013). <...> Cell innate immunity is based on the recognition of phytopathogenic surface molecules, which is a primary signal for actuating the complicated network, including induction and phytoimmunity regulation (I. Tarchevskii, 2000). <...> During signaling the essential role is played by proteins and small molecule messengers (salicylic acid and jasmonic acid, hydrogen peroxide, nitric oxide). <...> The earliest plant organism response to the pathogen introduction is a local generation of reactive oxygen species (oxidative burst), triggering a chain of subsequent defense mechanisms (S. Tyuterev, 2002). <...> A significant increase in the level of reactive O2 and H2O2 has an inhibitory effect on the pathogenic microorganisms. <...> The reactive oxygen species (ROS) are also suggested to play significant role in the membrane lypooxidation, cell wall modification and signal transduction (C. Richael et al., 1999; T. Pietras et al., 1997). <...> A key role in ROS regulation is played by an antioxidant defense system, which function is to slow down and prevent intracellular oxidation of organic substances. <...> In this, the antioxidant enzymes (superoxide dismutase, catalase, peroxidase) and low molecular weight antioxidants (ascorbic acid, glutathione, tocopherol, carotenoids, anthocyanins) are mainly involved (S.S. Gill et al., 2010). <...> The correlation was found between peroxidase activity in plant tissues and plant resistance to pathogens (T.B. Kumeiko et al., 2009; N. Radhakrishnan et al., 2009). <...> An increase in catalase activity is a defense reaction in cells during the next stages of biotic stress development (F.M. Shakirova, 2001). <...> Starting from reception of signaling molecules of phytopathogens on the cell membrane all metabolic processes are controlled by resistance genes that <...>