THE COMPARISON OF THE INFLUENCE THAT HIGH CONCENTRATION OF HEAVY METALS HAVE ON WINTER WHEAT IN THE CONDITIONS OF SOLUTION CULTURE

The phytotoxic action of Cu²⁺, Zn²⁺ and Ni²⁺ ions on winter wheat sprouts has been researched in the conditions of solution culture. It was found out that sprouts' germinal rootlets show selective resistance towards the action of the above mentioned heavy metals ions – they gradually reduce increase and stop their growth while influenced by Cu²⁺ with С_м at the level of 15∙10^-3 mol per m³, Ni²⁺ with С_м – 25∙10^-3 mol per m³, Zn²⁺ with С_м – more than 90∙10^-3 mol per m³. It was studied out that the increase of germinal sprigs gradually decreases while influenced by Ni²⁺ and Zn²⁺ ions in the frameworks of С_м, and completely stops when С_м Cu²⁺ are at the level of 15∙10^-3 mol per m³. Average rootlet and sprig indices have been calculated on which basis the increase of phytotoxity of studied winter wheat ions was found out: Zn²⁺ (К_{і average.} = 0.0866; П_і = 0.6382) ˂ Cu²⁺ (К_{і average.} = 0.0171; П_і = 0.1832) ˂ Ni²⁺ (К_{і average.} = 0.0099; П_і = 0.1703). It was substantiated that molar concentrations of Cu²⁺, Zn²⁺ and Ni²⁺ ions in the frameworks of 0.5-100∙10^-3 mol per m³ are not lethal for winter wheat