NITROPIRIN CONTRIBUTES TO THE ENHANCEMENT OF PLANT SALT TOLERANCE OF BARLEY (HORDEUM VULGARE L.)

The influence of Nitropirin® (NP), which is a mixture of the key enzyme cofactors of assimilation of inorganic nitrogen-nitrate reductase (NR) on enzyme activity in 7-day barley grown on the surface of the water, in the face of increasing male-content protein as well as in conditions of salinity produced by NaCl were investigated. Growing plants on solutions of NP increased general activity NR on 21 % and its active form at 76 %. Substrate induction NR using KNO₃ (20 mm), leading to increased male-content of protein, increased in the presence of the NP NR activity an average of 60 %, which may indicate a limit the HP activity at the level of its cofactors as normal and when you increase the enzyme content. In the presence of KNO₃ and HP Activator (exogenous 5-aminolevulinic acid) NP contributed to high salt tolerance of barley plants grown on NaCl solutions (150 mm), in the early stages of vegetation that was manifested in the stimulation of growth processes, increase the activity of NR and proline content, as well as in reducing AFC, detektiruemom on the ability of plants to generate the superoxide anion radical. 

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