[Pattern of selenium distribution in tomatoes Lycopersicum esculentum Mill].

We studied the pattern of selenium accumulation in Lycopersicum esculentum Mill plants in conditions of root and extra-root dressing with selenium. At the background of general trend towards predominant selenium accumulation in the fruit coat, a higher level of the microelement accumulation in the pulp was observed for selenates (Se+6) than selenites (Se+4). Application of Epin growth factor favored selenium accumulation in the plants; its concentration in the pulp was comparable to the concentration after selenate application, while the level of the microelement accumulation in the fruit coat, leaves, and roots was 2.2, 2.4, and 1.4 times lower, respectively. Combined application of Epin and sodium selenate had virtually no effect on selenium accumulation in the pulp but increased the microelement content in the fruit coat and roots. Biological significance of the observed "boundary effect" of selenium as a manifestation of plant antioxidant protection is discussed.