Effect of Salicylic Acid Foliar Application on Control of Nacl Salt Salinity on Some Morphological, Physiological Traits and Growth of Peppermint Mint(Mentha piperita)

In order to investigate the effect of salicylic acid foliar application on control of Nacl salt salinity on some morphological, physiological traits and growth of Peppermint Mint(Mentha piperita), experiment in a completely randomized design with 9 treatments, 3 replication and each replication with 5 plant, were done. NaCl with two levels of 50 and 100 mg/l and salicylic acid with tree levels of 50, 100 and 150 mg/l, were used. Distilat water uses as a control. Sprying with salicylic acid and irigation with NaCl solution (200mg for each pots) on 4 to 6 leavs for 3 week and two days in week, were done. Morphological, physiological traits of plant such as root and air fresh and dry weight, total chlorophyll, proline, protein, superoxide dismutase and peroxidase activity were evaluated. The results showed that had the highest morphological, physiological traits and enzymatic activity in control treatment and the lowest in NaCl 100ppm. Also the highest amount of proline in NaCl 100ppm treatment and the lowest in Control treatment.