Abstract
The effect of salt stress оn the physiological reaction in young bean plants was studied. The plants were grown in pots as hydroponic cultures in half-strength Hoagland nutrient solution under controlled conditions in a climatic room. The plants were treated for 7 days with NaCl and Na2SO4 (concentration 100 mM), starting at the appearance of the fi rst trifoliate leaf unfolded. The salts were added to the nutrient solution. It was established that the equimolar concentrations of both salt types caused stress in the young bean plants, which found expression in the suppression of growth, photosynthesis activity and caused changes in stomata status (conductivity, number and size). The transpiration and the cell water potential in salt-treated plants were reduced. The MDA level in root and shoot, and the proline content was increased.
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