University of Tehran perss Journal of Crops Improvement 2008-8337 25 4 2023 12 22 Evaluation of the effect of polyamines on antioxidant activities, oil, and protein contents and some physiological and biochemical traits of Camelina (Camelina sativa) under salinity stress Evaluation of the effect of polyamines on antioxidant activities, oil, and protein contents and some physiological and biochemical traits of Camelina (Camelina sativa) under salinity stress 1071 1089 95400 10.22059/jci.2023.356685.2797 FA Esmaeil Gholinezhad Associate professor, Department of Agricultural Sciences, Payame Noor University, Tehran, Iran Bakhtiar Lalehgani Assistant professor, Department of Agricultural Sciences, Payame Noor University, Tehran, Iran Shahryar Kazemi Assistant Professor, Department of Agricultural Sciences, Payame Noor University, Tehran, Iran. Journal Article 2023 03 12 In order to investigate the effect of polyamines on antioxidant activity and biochemical traits of Camelina under salinity stress conditions, a pot (as poen air) experiment was conducted at Payame Noor University (PNU), Iran in March 2022 as factorial layout based on a completely randomized design with 12 treatments and 3 repetitions. The salinity treatment was at three salinity levels (0, 15 and 30 dS/m) and 4 foliar spraying levels including 1- spermine (2 mM), 2- spermidine (2 mM), 3- putrescine (2 mM) and control (pure water foliar spraying). The results showed that with the increasing salinity stress, oil and protein contents and dry seed weight, chlorophyll index, shoot organic and mineral percentage decreased, but protein percentage, shoot ash percentage, soluble sugars, antioxidant activity and ion leakage percentage increased significantly. Salinity stress of 30 and 15 ds/m compared to the control, reduced the chlorophyll index (32 and 15 percent) and mineral percentage (19 and 3 percent), oil percentage (17 and 9 percent), dry oil weight in pot (62 and 21 percent) and dry seed weight (52 and 10 percent), but protein percentage (9 and 3 percent), ash percentage (33 and 30 percent), soluble sugars (32 and 20 percent) and antioxidant activity (21 and 13 percent) increased, respectively. Also, foliar spraying with polyamines increased the above traits, but decreased the percentage of ion leakage. Therefore, in order to decreasing the effects of salinity stress and increasing the dry seed and oil weights in pot, spraying with polyamines, especially spermine, is suggested. In order to investigate the effect of polyamines on antioxidant activity and biochemical traits of Camelina under salinity stress conditions, a pot (as poen air) experiment was conducted at Payame Noor University (PNU), Iran in March 2022 as factorial layout based on a completely randomized design with 12 treatments and 3 repetitions. The salinity treatment was at three salinity levels (0, 15 and 30 dS/m) and 4 foliar spraying levels including 1- spermine (2 mM), 2- spermidine (2 mM), 3- putrescine (2 mM) and control (pure water foliar spraying). The results showed that with the increasing salinity stress, oil and protein contents and dry seed weight, chlorophyll index, shoot organic and mineral percentage decreased, but protein percentage, shoot ash percentage, soluble sugars, antioxidant activity and ion leakage percentage increased significantly. Salinity stress of 30 and 15 ds/m compared to the control, reduced the chlorophyll index (32 and 15 percent) and mineral percentage (19 and 3 percent), oil percentage (17 and 9 percent), dry oil weight in pot (62 and 21 percent) and dry seed weight (52 and 10 percent), but protein percentage (9 and 3 percent), ash percentage (33 and 30 percent), soluble sugars (32 and 20 percent) and antioxidant activity (21 and 13 percent) increased, respectively. Also, foliar spraying with polyamines increased the above traits, but decreased the percentage of ion leakage. Therefore, in order to decreasing the effects of salinity stress and increasing the dry seed and oil weights in pot, spraying with polyamines, especially spermine, is suggested. https://jci.ut.ac.ir/article_95400_2b00ab57b328683cd9364cf797315b05.pdf