Abstract

Abstract Salicylic acid is one of Hormones recently used to increase the strength to stress such as drought. The aim of this experiment was to evaluate the effect of salicylic acid on physiological characteristics peppermint plant under drought conditions. For this purpose a factorial experiment based on completely randomized factorial with three levels of salicylic acid concentrations of 0 (control), 200 and 400 mg per liter and three levels of drought stress, 100% field capacity (control), 75% FC and 50% FC with three replications was conducted in greenhouse conditions Zanjan University. The results showed that salicylic acid, carotene and xanthophyll RWC and increased compared to control, so it can be said that salicylic acid could improve the properties of peppermint physiological. Key word: salicylic acid, Drought, peppermint, physiological traits.