Akhavan Armaki, M., Azarnivand, H., Asareh, M., Jafari, A., Tavili, A. (2013). Physiological and morphological characteristics in seedlings of four Bromus inermis ecotypes under drought stress in germinator and greenhouse condition. , 19(4), 669-678. doi: 10.22092/ijrdr.2013.3053
Mojtaba Akhavan Armaki; Hossein Azarnivand; Mohammad Hasan Asareh; Ali Ashraf Jafari; Ali Tavili. "Physiological and morphological characteristics in seedlings of four Bromus inermis ecotypes under drought stress in germinator and greenhouse condition". , 19, 4, 2013, 669-678. doi: 10.22092/ijrdr.2013.3053
Akhavan Armaki, M., Azarnivand, H., Asareh, M., Jafari, A., Tavili, A. (2013). 'Physiological and morphological characteristics in seedlings of four Bromus inermis ecotypes under drought stress in germinator and greenhouse condition', , 19(4), pp. 669-678. doi: 10.22092/ijrdr.2013.3053
Akhavan Armaki, M., Azarnivand, H., Asareh, M., Jafari, A., Tavili, A. Physiological and morphological characteristics in seedlings of four Bromus inermis ecotypes under drought stress in germinator and greenhouse condition. , 2013; 19(4): 669-678. doi: 10.22092/ijrdr.2013.3053

Physiological and morphological characteristics in seedlings of four Bromus inermis ecotypes under drought stress in germinator and greenhouse condition

تحقیقات مرتع و بیابان ایران
Article 11, Volume 19, Issue 4, March 2013, Pages 669-678    PDF (168.09 K)
Document Type: Research Paper
DOI: 10.22092/ijrdr.2013.3053
Authors
Mojtaba Akhavan Armaki* 1; Hossein Azarnivand2; Mohammad Hasan Asareh3; Ali Ashraf Jafari4; Ali Tavili5
1PhD Student in Range Management, Faculty of Natural Resources, Tehran University, Karaj, Iran
2Professor, Faculty of Natural Resources, Tehran University, Karaj, Iran
3Professor, Research Institute of Forests and Rangelands, Tehran, Iran
4Associate Professor, Research Institute of Forests and Rangelands, Tehran, Iran
5Associate Professor, Faculty of Natural Resources, Tehran University, Karaj, Iran
Abstract
Drought has a major influence on morphological and physiological characteristics of plant species. Drought stress has a direct relationship with germination characteristics including germination percentage, seedling length (mm/plant), root to shoot ratio, seedling weight (g), ratio of dry weight to fresh weight of seedlings (g.dfw-1) and seed vigor index (V). In this research, effects of drought stress on these characteristics were examined in four genotypes of Bromus inermis (Alborz 303, Mazandaran 3151, Firozkuh 3966 and Esfahan 200060) under laboratory and greenhouse condition. In greenhouse experiment, three physiological traits including chlorophyll, carbohydrates and proline contents were measured. Drought treatments included four levels of osmotic potential (0, -0.3, -0.6 and -0.9 MPa) in germinator and four levels of osmotic potential (FC, 25% FC, 50% FC and 75% FC) in greenhouse, made by Poly-Ethylene-Glycol (PEG 6000) solution in laboratory and weighting method in greenhouses, respectively. Results showed that Esfahan (200060) genotype was better than two other genotypes in terms of germination percentage under two conditions. Increasing drought stress increased proline and carbohydrate and decreased the chlorophyll content.
Keywords
physiological; Morphological; Bromus inermis; Proline
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