Adaptability rate of the ornamental shrubs to stress factors of Russia subtropics
Resistance of the most promising for the zone cultivars Hydrangea macrophylla (Thunb.) Ser.) and Weigela × wagneri L.H. Bailey) was investigated in terms of the research. Water deficit, concentration of cell sap, and activity of such ferments as catalase and peroxidase are the most significant points for given crops. It was found out that sorts variations of water economy and ferment activity level become more intensive if stress factors (temperature, air humidity and soil) grow up. Abiotical factors stress effect on unstable cultivars causes leaf falling and decreases ornamental capacity. Rating scale, developed in terms of the research, includes parameters that characterize physiological state of H. macrophylla and W. × wagneri during peak stress period.