RESPONSE OF TEST-ORGANISMS TO DIFFERENT Na AND Cu SALTS

The scope of this research involves the evaluation of biological impact of different Na and Cu salts (nitrates, sulphates and chlorides) on test-organisms. The toxic impact of Na and Cu salts on seed germination and root growth of Lepidium sativum (garden-cress) as well as mortality, growth and physiological parameters of Oncorhynchus mykiss (rainbow trout) in early development stages (embryos and larvae) were determined. Among Na salts, nitrate was the most toxic to both test-organisms. Among tested Cu salts, sulphate caused the strongest toxic impact on L. sativum and nitrate – on embryos and larvae of O. mykiss. The accumulation of all tested anions and c ations from the solutions of tested salts was higher in roots than in shoots of L. sativum. The highest transfer of Na+ and Cu2+ from roots to shoots was determined for plants cultivated in sulphate salt. The transfer of SO4 2ˉ was the highest among tested anions of sodium salts and the transfer of NO3ˉ was higher among tested anions of copper salts. The rather high correlation was found between root length and amount of Na+, NO3 ˉand SO4 2ˉ ions in plant roots and rather low correlation coefficient was calculated between root length and the amount of Na+ and Clˉ ions in roots.