تأثیر کاربرد سالیسیلیک اسید بر عملکرد گیاه دارویی بادرشبی در شرایط تنش شوری

In order to study the effect of salicylic acid on yield of moldavian balm under saline stress conditions a greenhouse experiment was conducted as a factorial based on completely randomized design with 3 replications. The first factor was different concentrations of salicylic acid application at 4 levels of 0, 0.5, 1 and 1.5 mM, and the second factor was different concentrations of salt (NaCl) at 3 levels of 0, 2.5 and 5 mM/cm. Salicylic acid treated by spraying on plants. Results showed that the effect of salinity on leaf number was significant. The highest number of leaves obtained by 2 treatments of 0 (control) and 2/5 mM/cm salinity, and the minimum number of leaves was observed in 5 mM/cm salinity. The interaction effect of salinity and salicylic acid on plant height, amount of chlorophyll and yield was significant. The maximum plant height obtained from irrigation level of 0 mM/cm salinity with 0, 0.5 and 1 mM salicylic acid foliar application, and the lowest plant height belonged to salinity of 5 mM/cm without SA application. Treatments of 2.5 and 5 mM/cm salinity without spray with salicylic acid had the lowest yield compared to other treatments. The highest amount of chlorophyll belonged to irrigation treatments of 0 and 2.5 mM/cm salinity with spraying of different amounts of salicylic acid.