Salicylic acid (SA) (o-hydroxybenzoic acid), which belongs to a group of plant phenolics, is widely distributed in plants and is now considered as a hormone-like substance, which plays an important role in the regulation of plant growth and development. Exogenous SA alters the activities of antioxidant enzymes and increases plant tolerance to abiotic stress by decreasing generation of ROS. It has been found that SA has different effects on stress adaptation and damage development of plants that depend on plant species, concentration, method and time of SA application. The field experiment was laid out factorial with randomized complete block design with three replications. Treatments included varieties (a1: Bam, a2: Sistan, a3: Hirmand, a4: Hamun) as factor a and factor b consisted of salicylic acid (b1: 0 μM, b2: 900 μM, b3: 1800 μM, b4: 2700 μM). Analysis of variance showed that the effect of varieties on all characteristics was significant. Analysis of variance showed that the effect of salicylic acid on all characteristics was not significant.
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