Amin Abbasi

Due to the dynamic nature of their environment, plants are exposed to a wide range of stress factors. These factors can significantly impact the growth, yield, and physiological and biochemical efficiency of plants. In the meantime, water stress, the most common environmental stress, significantly limits production on approximately 25% of the world's land. Therefore, the purpose of this research is to investigate the impact of spraying different concentrations of ascorbic acid on the Savory medicinal plant under water stress conditions. This experiment was conducted in 1400 at the research greenhouse of Maragheh University as a factorial design in a randomized complete block design with three replications. The investigated factors include water stress at three levels: 90%, 60%, and 30% of field capacity (FC) and spraying of ascorbic acid at three concentrations: 0, 1, and 2 mM. The results of this research indicate that the increase in water stress intensity led to a notable increase in hydrogen peroxide levels. Moreover, the application of ascorbic acid under stress conditions was found to significantly decrease the amount of hydrogen peroxide. Additionally, as stress intensity increased, the activity of the catalase enzyme first increased and then decreased. Furthermore, the use of ascorbic acid, particularly at a concentration of 2 mM, significantly enhanced the activity of this enzyme.