University of Guilan Iranian Journal of Seed Sciences and Research 2476-3780 11 4 2024 12 21 Effect of electromagnetic field intensity and duration on germination of rice (Oryza sativa L.) under drought stress Effect of electromagnetic field intensity and duration on germination of rice (Oryza sativa L.) under drought stress 67 82 8799 10.22124/jms.2024.8799 FA Reza Imam Dost Master's student, Department of Agriculture and Plant Breeding, Astara Branch, Islamic Azad University, Astara, Iran Davar Molazem ِDepartment of Agriculture,, Astara Branch, ,Islamic Azad University, Astara, Iran Reza Taghizadeh Assistant professor, Department of Agronomy and plant breeding, Astara branch, Islamic Azad University, Astara, Iran. Journal Article 2025 01 26 An experiment was conducted in 2024 as a factorial in a completely randomized design with the variables of electromagnetic field intensity and duration under drought stress using polyethylene glycol (PEG6000) on Hashemi variety rice seeds with the aim of investigating the effect of these variables on germination and physiological traits at Islamic Azad University, Astara Branch. Rice seeds were treated in a plastic bag under magnetic fields with intensities (0, 50, 100 and 150 mT), durations (30 and 60 minutes) and three levels of drought stress (0, -3 and -6 bar) using polyethylene glycol. The results of variance analysis showed that magnetic field, drought stress and their interaction were significant for most traits. Drought stress significantly increased proline and malondialdehyde content and decreased chlorophyll a and b. The highest chlorophyll content, germination rate, radicle length, shoot length, and seedling length were obtained at a field intensity of 100 mT and under no drought stress conditions. Also, treatment with a field intensity of 100 mT for 60 minutes showed significant improvement in germination percentage and rate, radicle length, shoot length, and seedling length compared to the control. In contrast, treatment with a field intensity of 150 mT for 60 minutes and -6 bar drought stress reduced all germination-related traits. The findings indicate the potential of using electromagnetic fields to improve germination characteristics and some physiological traits of rice seeds under drought stress conditions up to -6 bar. An experiment was conducted in 2024 as a factorial in a completely randomized design with the variables of electromagnetic field intensity and duration under drought stress using polyethylene glycol (PEG6000) on Hashemi variety rice seeds with the aim of investigating the effect of these variables on germination and physiological traits at Islamic Azad University, Astara Branch. Rice seeds were treated in a plastic bag under magnetic fields with intensities (0, 50, 100 and 150 mT), durations (30 and 60 minutes) and three levels of drought stress (0, -3 and -6 bar) using polyethylene glycol. The results of variance analysis showed that magnetic field, drought stress and their interaction were significant for most traits. Drought stress significantly increased proline and malondialdehyde content and decreased chlorophyll a and b. The highest chlorophyll content, germination rate, radicle length, shoot length, and seedling length were obtained at a field intensity of 100 mT and under no drought stress conditions. Also, treatment with a field intensity of 100 mT for 60 minutes showed significant improvement in germination percentage and rate, radicle length, shoot length, and seedling length compared to the control. In contrast, treatment with a field intensity of 150 mT for 60 minutes and -6 bar drought stress reduced all germination-related traits. The findings indicate the potential of using electromagnetic fields to improve germination characteristics and some physiological traits of rice seeds under drought stress conditions up to -6 bar. https://jms.guilan.ac.ir/article_8799_a5a744dfb640b9e04fe1a99bae1151b9.pdf