University of Guilan Iranian Journal of Seed Sciences and Research 2476-3780 6 3 2019 09 23 The effect of different treatments on seeds dormancy and germination of Gundelia tournefortii The effect of different treatments on seeds dormancy and germination of Gundelia tournefortii 347 358 3817 10.22124/jms.2019.3817 FA Fateme Panahi Assistant Professor, Faculty of Natural Resources, University of Kashan, Kashan, Iran Mina Arast Ph.D student of Combat Desertification, Faculty of Natural Resources, University of Kashan, Kashan, Iran Journal Article 2016 05 03 Due to the increasing importance of on multiple uses native plants of dry lands, methods of improving seed germination rates of<em> Gundelia tournefortii,</em> a cold and arid land species with pharmacological and edible values, were investigated. Dormancy breaking treatments were applied in a completely randomized design. Seeds were then set in a germinator (25±1˚C - 70±3 %) and germination velocity and percentage and radicle and plumule length were recorded. Different treatments were applied including humic acid (for 26 and 54 mg/L), scarification H₂SO₄ (10 and 20 min), soaking in 300 and 500 ppm gibberellic acid (for 24 and 48 hours), temperature (15 and 30 min- 70˚C), Chilling (7 and 14 days- 4˚C), a complex treatment of Chilling (7 and 14 days- 4˚C) and gibberellic acid 500 ppm for (24 and 48 hours), and distilled water as control treatment. Results showed germination percentage and velocity and radicle and plumule length increase in all treatments rather than control. Only sulfuric acid and heat treatments prevented adequate radicle and plumule length growth. In the current study, the most successful treatment is the complex treatment of Chilling (7 and 14 days- 4˚C) and 500 ppm gibberellic acid which increased germination percentage to about 84% and also germination velocity to a high rate. Due to the increasing importance of on multiple uses native plants of dry lands, methods of improving seed germination rates of<em> Gundelia tournefortii,</em> a cold and arid land species with pharmacological and edible values, were investigated. Dormancy breaking treatments were applied in a completely randomized design. Seeds were then set in a germinator (25±1˚C - 70±3 %) and germination velocity and percentage and radicle and plumule length were recorded. Different treatments were applied including humic acid (for 26 and 54 mg/L), scarification H₂SO₄ (10 and 20 min), soaking in 300 and 500 ppm gibberellic acid (for 24 and 48 hours), temperature (15 and 30 min- 70˚C), Chilling (7 and 14 days- 4˚C), a complex treatment of Chilling (7 and 14 days- 4˚C) and gibberellic acid 500 ppm for (24 and 48 hours), and distilled water as control treatment. Results showed germination percentage and velocity and radicle and plumule length increase in all treatments rather than control. Only sulfuric acid and heat treatments prevented adequate radicle and plumule length growth. In the current study, the most successful treatment is the complex treatment of Chilling (7 and 14 days- 4˚C) and 500 ppm gibberellic acid which increased germination percentage to about 84% and also germination velocity to a high rate. https://jms.guilan.ac.ir/article_3817_2b0d44bc882028d1f65763783a6d95a9.pdf