Background: Salinity is one of the main factors limiting the growth and productivity of plants, for this reason, finding plants that are resistant to salinity, such as quinoa, is a suitable solution for the efficiency of salty waters and limited water resources in the country. Is. To deal with this problem, cultivars resistant to salt stress should be evaluated. In addition to investigating the genetic capacity of cultivars, it is necessary to study the effect of phytohormones such as salicylic acid (SA), which is one of the most prominent roles of salicylic acid in plant stress tolerance, where it can act as a signaling molecule that induces resistance.
Aim: To study the effect of salicylic acid treatment in reducing the effect of salinity stress on growth stages and response of six quinoa cultivars.
Methodology: The current research was carried out in the agricultural year of 1400 in the Department of Research Treasury of the Faculty of Agriculture and Natural Resources of the Persian Gulf University. This experiment was carried out factorially on 6 varieties of quinoa and irrigation with three levels of saline water (level without salt, with wastewater (EC=9.02) of the college with a concentration of 5 and 9 dS/m) and spraying with two levels of salicylic acid (0 and 2 millimolar) was carried out in the form of a basic design of randomized complete blocks with three replications. Morphological traits include plant height, stem branching angle, stem diameter, inflorescence diameter, inflorescence length and width, plant weight, number of seeds per plant, inflorescence weight, thousand seed weight, harvest index, length and width of upper leaves, length Upper petiole, length and width of lower leaves, length of lower petiole and phytochemical traits including chlorophyll a, b and total and carotenoids, greenness index, as well as relative water content and electrolyte leakage were measured.
Conclusions: The results of analysis of variance for the examined traits sh