ORIGINAL ARTICLE

Comparison of Catalase and Ribonuclease Activities of Glycine max and Glycine soja to the Effect of Copper and Zinc Sulfates

A chemical anthropogenic factor slows plant growth and causes oxidative stress. The aim of this study was to compare catalase and RNase activities in Glycine max and Glycine soja exposed to CuSO₄ and ZnSO₄ at MPC and DMPC concentrations over a period of 24-168 hours. Glycine soja was shown to possess a higher adaptive potential. Species-specific multiple enzyme forms were identified: K1 in Glycine soja and P12 in Glycine max. The tolerance limits of Glycine soja were noted at 24, 72, and 120 hours; in Glycine max, they varied depending on the toxicant and dose. Catalase and RNase activities can be used as complementary biomarkers of soybean adaptation to heavy metal toxicity.