Volume 12, Issue 1 (5-2018)
مرتع 2018, 12(1): 48-61 |
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Gorgin Karaji M, Vahabi M, Siosemardeh A, Hosseinpanahi F, Eshghizadeh H, Bassiri M. Germination characteristics of Vicia variabilis Grossh. response to temperature and drought stress. مرتع 2018; 12 (1) :48-61
URL: http://rangelandsrm.ir/article-1-558-en.html
URL: http://rangelandsrm.ir/article-1-558-en.html
Mahtab Gorgin Karaji 
, Mohammadreza Vahabi , Adel Siosemardeh , Farzad Hosseinpanahi , Hamidreza Eshghizadeh , Mehdi Bassiri
, Mohammadreza Vahabi , Adel Siosemardeh , Farzad Hosseinpanahi , Hamidreza Eshghizadeh , Mehdi Bassiri
Abstract: (4872 Views)
This research was conducted to investigate the characteristics of Vicia variabilis Grossh seed germination in response to different levels of dryness and temperature in two phases of laboratory and greenhouse. The research was done as a factorial based on a completely randomized design with four replications. The treatments consisted of 7 temperature levels, five levels of drought treatment and non-stress treatment (control). In a greenhouse trial, a completely randomized design was applied to four treatments including control (without irrigation), irrigation from planting until May 5, and irrigation from planting until May 20, irrigation from planting until the end of growth period. The results showed in all temperature treatments, the highest percentage of germination was observed in control. By decreasing the water potential from the control to -1Mpa, the percentage of germination decreased. Seed germination at 15 and 20 °C were observed at all the water potential levels. Germination did not occure at 35 °C. The highest rate of germination (12.71 seed/day) was observed at 20 °C, and with decreasing water potential, the rate of germination decreased (0.19 seed/day). Among all the treatments of the water potential and temperature levels, the highest germination rate was in 20 °C for the control treatment (3.81 day) which did not show significant difference with its amount in the first and second levels of the temperature (20°C), as well as at 15 °C (4.71 day). The highest radicle length (30.37 mm), shoot length (31.37 mm) and seed vigor index (0.3288) were observed at 15 °C. Based on the results of pot culture at the beginning of the cultivation, irrigation significantly increased the percentage of germination. This irrigation was sufficient for 50 days for the survival of germinated seeds and plant growth until the end of the vegetative period. The results of this research can be considered in rangeland rehabilitation projects.
Type of Study: Research |
Subject:
Special
Received: 2018/04/27 | Accepted: 2018/04/27 | Published: 2018/04/27
Received: 2018/04/27 | Accepted: 2018/04/27 | Published: 2018/04/27
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