Exploring The Effect of Methyl Jasmonate Spreading and Salicylic Acid During Salinity Conditions on the Morphological and Physiological Traits of Two Strawberry Varieties (Silva and Gamarosu)1

Drought increases the salinity of agricultural lands. Recognizing some physiological mechanisms in strawberry plants is essential for facing the salinity.Methyl jasmonate is a plant growth regulator that affects many biochemical and physiological processes in a plant. Salicylic acid, as one of the hormones, plays an important role in increasing plant resistance to environmental stress. Growth regulators play a vital role during the growth stages of plants and their application can increase the quantitative and qualitative yields of plants. The present facotrial experiment followed arandomized complete block design with three replications andexplored the effect of different concentrations of methyl jasmonate (0, 1 and 2 micromolar) and Salicylic acid (0.2 and 4 mM) under conditions of salinity stress (0, 5 and 10 dS) on some morphological responses (plant height and leaf area), physiological traits (soluble solids, vitamin C and acidity), and function (fruit number, fruit weight and fruit yield) of strawberry plants. In the year 2018-2019, in Azad Shahr city of Golestan province, two strawberry cultivars (Silva and Camaroso (Fragaria × ananassa Duch, Selva and Camarosa)) were examined. The results of this study showed that salinity stress significantly reduced the morphological and physiological properties of two strawberry cultivars Silva and Camarrowso. Quantitative properties of plant height and leaf area, and the qualitative properties of soluble material, vitamin C, and acidity decreased with increasing salinity. Methyl jasmonate and salicylic acid significantly increased vegetative and reproductive growth. This result also correlates with the performance of two cultivars. In examining the effect of these two treatments under the same conditions of salinity, the salicylic acid in comparison with methyl jasmonate was shown to increase the quantitative and qualitative properties under salinity conditions.