L.T. Mishchenko - Dr.Sc. (Biol.), Professor, Leading Researcher, Virology Department, ESC "Institute of Biology", Taras Shevchenko National University of Kyiv (Ukraine)
A.A. Dunich - Ph.D. (Biol.), Research fellow, Virology Department, ESC "Institute of Biology", Taras Shevchenko National University of Kyiv (Ukraine)
A.V. Dashchenko - National University of Life and Environmental Sciences of Ukraine (Kyiv)
N.I. Sidel-nikov - Ph.D. (Biol.), Director of All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow, Russia)
V.Yu. Maslyakov - Ph.D., Deputy of Director on the Scientific Work, All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow, Russia)

It was revealed that 15-30 % of purple coneflower plants infected Tomato spotted wilt virus. It was investigated that concentration of nine microelements (As, V, Sb, Cr, Fe, Ba, Sr, B, Mn) in purple coneflower plants under viral infection is higher than in healthy plants. Content of seven metals (Cd, Ni, Mo, Ti, Al, Zn і Al) was less than in the control samples. Differences for other elements (Pb, Hg, Cu, Co, Li) are not educed. It is necessary to notice that content of high-toxic elements (As, V, Sb, Cr, Fe) in the infected plants exceeded maximum allowable concentrations (MAC) in 1.2, 7.0, 2.3, 2.5 and 3.4 times respectively, unlike control samples in which concentration of these metals was within the limits of norm.