Document Type : Research Paper

Authors

• A. Rahmanpour ¹
• A. Majd ²
• F. Chalabiane ³

¹ Research Institute of Forests and Rangelands, Tehran, Iran

² Teacher Training University, Tehran, Iran

³ Islamic Azade University, North Tehran, Iran

Abstract

The effects of hormonical, chemical and physical treatments were studied on seed germination of seeds of Eremurus olgae. The ripening seeds were collected from National Botanical Garden of Iran. Seeds were treated under physical stimulator pretreatments including soaking seeds in the water for 24-48h, cutting seeds top, making abrasion on seed cortex, subjecting to light for 24h, 12h and absolute darkness and chemical stimulator like sodium hypochloride, citric acid and gibberellic acid in different densities for finding the appropriate methods of seed germination and dormancy breaking were applied. The results showed that the most suitable pretreatment and treatment were soaking seeds in water for 24-48h, removing seed cortex, cutting seed top, temperature 10-15°C, white light, 24h (4500-5000 lux) and treating in gibberrelic acid (0.08 Molar) for 45 minutes in 1-3 weeks makes the germination percentage (80%), germination speed 1.6, seed vigor 13.65 and treating in citric acid (30 mg/lit) with germination percentage (70%), germination speed (1.27) and seed vigor (7.3). The results showed some important differences comparing to controls.

Keywords

• Eremurus olgae
• dormancy of seed
• gibberrelic acid hormone
• Citric acid