Evaluation of Morphophysiological Traits and Response of Soybean Cultivars to Foliar Treatment with Methyl Jasmonate and Salicylic Acid

Extended Abstract Introduction and Objective: Soybean (Glycine max) belongs to Leguminous and is one of the legumes that provides food to millions of people and plays a major role in the preparation of chemicals. The Fabaceae family includes legumes, which are the second most important crop family after the poace family. Soybeans are an important thermophilic food product that contains important proteins that support human health. Material and Methods: In order to investigate the response of two soybean cultivars to the hormone at different stages of growth and the effect of hormones on yield and yield components, a factorial experiment based on a completely randomized design with three replications was conducted in the research greenhouse of Graduate University of Advanced Technology in 2020. Soybean plants were treated with salicylic acid and methyl jasmonate and with two hormones simultaneously, and control pots were treated distilled water. During the growing period, fertilization was performed with complete Hoagland fertilizer and after a proper growth period, the samples were harvested at physiological maturity. After sowing, the seeds of Rhizobium were given in two stages in order to induce soybean roots. Results: The results of this study showed a significant difference between cultivars in terms of different hormone application: In control plants that did not receive any hormones, these morphological features are minimum The results showed that there were significant differences in the number of nodules per root, pod weight per plant, leaf area, and harvest index under the interaction of cultivar and hormone. The results of comparing the means showed that the simultaneous application of salicylic acid and methyl jasmonate increased the growth and yield of the cultivars. Conclusion: Among morphological traits (shoot height, root length and width, number of lateral roots, fresh and dry weight of shoot and root and pod weight) in hormone treatment conditions for Williams cultivar showed more increase than L17 cultivar. The results of this study can be used in research for the practical use of such compounds and to enhance performance and important traits in performance.