University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 32 3 2022 10 29 Evaluation of the effect of foliar application of potassium, salicylic acid and gamma aminobutyric acid on yield, yield components and uptake of nitrogen, phosphorus and potassium in bread wheat genotypes under soil salinity stress conditions Evaluation of the effect of foliar application of potassium, salicylic acid and gamma aminobutyric acid on yield, yield components and uptake of nitrogen, phosphorus and potassium in bread wheat genotypes under soil salinity stress conditions 133 148 15503 10.22034/saps.2021.46995.2707 FA Vahid Salmanpour PhD Student of Islamic Azad University, Mahabad Branch and Instructor., Dept. of Agricultural Sciences, Payame Noor University, Tehran, Iran. Soran Sharafi Assistant Professor, Department of Agriculture and Plant Breeding, Islamic Azad University, Mahabad Branch, Mohammad Rezaei Associate Professor of Agricultural and Natural Resources Research Center of West Azerbaijan Province Marouf Khalily Associate Professor, Department of Biotechnology and Plant Breeding, Payame Noor University, Tehran, Iran Naser Abbaspour Associate Professor, Department of Biology, Faculty of Science, Urmia University Journal Article 2021 07 15 The effect of foliar application of potassium, salicylic acid and gamma aminobutyric acid on morphophysiological traits and nutrient uptake of bread wheat genotypes under soil salinity stress was studied as a research conducted in agricultural research station in Miandoab, West Azerbaijan during the two cropping years 1396-97 and 1397-98. The experiment was performed as a split plot in a randomized complete block design with three replications under soil salinity (0 and 8 dS / m). Main plots included foliar application with growth stimulants: potassium, GABA, SA, control and subplots included seven genotypes ( Orum, Zare, Mihan, Heydari, MS-89-12, MS -89-13 and MS-91-14). The analysis of variance showed that the simple effects of salinity stress on grain yield and foliar application treatments on all studied traits were significant. Also, the simple effects of different genotypes on all measured traits were significant. The interactions of three factors of salinity, foliar application and genotype had a significant effect on all measured traits. Based on the results, comparison of the means showed that GABA foliar application under non-stress conditions with an average of 11366.7 kg / ha in Mihan cultivar produced the highest grain yield, while GABA foliar application under salinity stress conditions with the average of 1876.7 kg / ha produced the lowest grain yield in Orum cultivar. The overall results showed that most of the traits were reduced due to salinity stress. Foliar application of all the compounds in most traits caused an increase compared to the control conditions. The effect of foliar application of potassium, salicylic acid and gamma aminobutyric acid on morphophysiological traits and nutrient uptake of bread wheat genotypes under soil salinity stress was studied as a research conducted in agricultural research station in Miandoab, West Azerbaijan during the two cropping years 1396-97 and 1397-98. The experiment was performed as a split plot in a randomized complete block design with three replications under soil salinity (0 and 8 dS / m). Main plots included foliar application with growth stimulants: potassium, GABA, SA, control and subplots included seven genotypes ( Orum, Zare, Mihan, Heydari, MS-89-12, MS -89-13 and MS-91-14). The analysis of variance showed that the simple effects of salinity stress on grain yield and foliar application treatments on all studied traits were significant. Also, the simple effects of different genotypes on all measured traits were significant. The interactions of three factors of salinity, foliar application and genotype had a significant effect on all measured traits. Based on the results, comparison of the means showed that GABA foliar application under non-stress conditions with an average of 11366.7 kg / ha in Mihan cultivar produced the highest grain yield, while GABA foliar application under salinity stress conditions with the average of 1876.7 kg / ha produced the lowest grain yield in Orum cultivar. The overall results showed that most of the traits were reduced due to salinity stress. Foliar application of all the compounds in most traits caused an increase compared to the control conditions. https://sustainagriculture.tabrizu.ac.ir/article_15503_7cf7b2d5e33ebda93b99ceff92c80279.pdf