EFFECTS OF SALICYLIC ACID ON THE FORMATION OF OXIDATIVE STRESS INDUCED BY CdSO4 IN THE KRASNODARSKAYA 99 WHEAT GERMS

Abstract

This aim of this paper is to study the effect of salicylic acid - a substance that combines the properties of a signal mediator and a stress hormone - on the functioning of the pro- and antioxidant system components of wheat germs under the action of cadmium sulphate. To this end, wheat seeds (Triticum aestivum l.) of the Krasnodarskaya 99 variety were soaked in a 0,1 mm salicylic acid solution for 6 hours and subsequently grown using cadmium sulphate solutions at increasing concentrations. The germination energy was determined on the 3rd day of germination. On the 7th day of the experiment, the effect of CdSO₄ on the wheat germs was assessed by the length and wet weight of the shoots and the root system; the activity of lipid peroxidation; the proline and pigment content in the leaves of the sprouts. It is established that the values of growth rate, lipid peroxidation activity, proline and photosynthetic pigment content depend on the concentration of CdSO₄. It should be noted that the growth rate shows a monotonous dependence on the CdSO₄ concentration, while all the other parameters - non-monotonous. It is concluded that salicylic acid contributes to the enhanced oxidative stress of the plants at all of the studied CdSO₄ concentrations, thus supporting their antioxidant systems at higher levels.