Abstract. The main goal of this research was to investigate the changes in the biological indicators,
antioxidant and pro-antioxydant enzyme systems of 10-day-old soybean sprouts under stress conditions
created by the equimolar concentration of NaHCO3 + Na2CO3 salts. The results of the experiments
revealed that the created stress has a serious negative effect on the development of the root
and leaf systems of seedlings, including the amount of chlorophyll in the leaves. This effect begins
to manifest itself at the weakest applied concentration and becomes stronger as the concentration
of salts increases. At 150 mM concentration, the mass of the root system decreases by 3.5 times,
and that of the leaves by about 2 times, compared to the control. A similar result is also observed
in the dry weight of the root and leaf system of seedlings. The low concentration of salts (50 mM)
induced the activity of antioxidant enzymes in the tissues of the root system of seedlings, while in
the leaves it had a weak inhibitory effect on the activity of SOD and GR enzymes, and a stimulating
effect on the activity of APX and CAT enzymes. Due to salt increase in the habitat, SOD and GP were
weakened in both tissue cells, while in APX and CAT enzymes, this situation was observed only at the
highest concentration of salt solution.

EFFECT OF COMBINED SALT STRESS OF ALKALINE TYPE ON BIOLOGICAL INDICATORS, ANTIOXIDANT AND PROOXIDANT ENZYME SYSTEMS OF SOYBEAN SPROUTS

JOURNAL ARTICLE published 2023 in Acta Botanica Caucasica

https://doi.org/10.30546/abc.2023.2.1.80.