Dovgaiuk-Semeniuk M. Specifics of the nitrogen metabolism in the red clover plants under the conditions of oil polluted soil

The thesis is devoted to the research of physiology-biochemical parameters of nitrogen metabolism in the organs of Trifolium prаtense L. in the conditions of oil polluted soil. It is shown that a component of T. pratense L. plants’ adaptation to the conditions of oil polluted soil is the plasticity of nitrogen metabolism. In particular, it is set that under the influence of oil polluted soil conditions on the primary stages of T. pratense L. plants’ growth – the stage of cotyledon leaves the accumulation of amides and amino acids took place, particularly the proline content had grown seven times. It is established that amides and amino acids accumulation occurred on the background of glutamine synthetase and glutamate synthase activity growth in the organs of T. pratense L. plants. On the following stages – stages of first true and first trifoliate leaf – in the conditions of oil polluted soil inhibited the glutamine synthetase activity and even more significant - the glutamate synthase activity did. Inducted by the conditions of oil polluted soil accumulation of amino acids and amides in the organs of T. pratense L. plants in the periods of growth was less expressed, while the amount of arginine had significantly grown.