Effect on Low Temperature Stress on Lipid Peroxidation and Activity of Cell Defense Enzymes of Four Evergreen Broadleaved Tree Species Effects of Calcium on Activities of Protective Enzymes and Soluble Protein Content in the Leaves of Tomato under Low Light Stress Effects of Calcium on Activities of Protective Enzymes and Soluble Protein Content in the Leaves of Tomato under Low Light Stress EFFECT OF DROUGHT STRESS ON ACTIVITY OF CELL DEFENSE ENZYMES AND LIPID PEROXIDATION IN LEAVES OF BETULA PLATYPHYLLA SEEDLINGS Effects of salt stress on some physiological characteristics of Spartina anglica seedling Effects of Soil Water Content on the Physiological and Biochemical Characteristics in Elaeagnus mollis Diels Seedlings Physiological and Biochemical Response of Elaeagnus mollis Seedlings to NaCl Stress