1. PEROXIDASE ACTIVITY, STOMATAL CONDUCTANCE AND CARBOHYDRATE METABOLISM IN SOYBEAN PLANTS UNDER HEAVY METAL STRESS. Authors: SILVIA ONAC, VICTORIA CRISTEA, MARTIN KEUL, DANA BÁTHORY, MIHAI TRIFU.2. ACCUMULATION OF PHOTOSYNTHETIC PIGMENTS AND PROTEINS IN THE LEAVES OF SOYBEAN PLANTS CULTIVATED ON MINE SPOILS. Authors: SILVIA ONAC, VICTOR BERCEA, MIHAI TRIFU.3. ACCUMULATION OF SOME HEAVY METALS FROM MINE SPOILS. Authors: SILVIA ONAC, MIHAI TRIFU.4. THE GROWTH AND SEED PRODUCTION OF SOYBEAN PLANTS CULTIVATED ON MINE SPOILS. Authors: SILVIA ONAC.