Volume 5, Issue 1 ((Spring and Summer) 2018)                   Iranian J. Seed Res. 2018, 5(1): 33-53 | Back to browse issues page


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Hosseini S, Rafieolhossaini M, Roshandel P. Effect of Magnetic Field on Seed Germination of Guizotia abyssinica under Drought Stress Conditions. Iranian J. Seed Res.. 2018; 5 (1) :33-53
URL: http://yujs.yu.ac.ir/jisr/article-1-311-en.html
Shahrekord University , m_rafiee_1999@yahoo.com
Abstract:   (4310 Views)
DOR: 98.1000/2383-1251.1397.5.33.9.1.1578.1610

Extended abstract
Introduction: Niger with the scientific name of Guizotia abyssinica (L.F.) Cass. belongs to the Asteraceae family. Niger seed contains 50-75 percentage of oil which is used in the treatment of rheumatism and burns, and as a substitute for olive oil. Its meal is also used for animal feeding. Environmental crises sustained by living systems are considered as stress. Drought stress is one of the non-biological stresses. Yield reduction due to this type of stress is reported to be higher than that related to other stresses. Since plant development starts from germination and for survival, the seeds should germinate to adapt themselves to the environmental conditions and establish themselves in the soil, the success of passing the germination stage will play an important role in other stages of plant establishment. Different studies have shown the positive effect of magnetic field on increasing germination characteristics. In this regard, applying a magnetic field before planting is a safe and inexpensive method for increasing germination and seedling growth. Seed priming is useful for a faster and more powerful response to drought stress and among different types of priming, physical priming is of particular importance for ecological reasons and for not having a negative impact on the environment.
Materials and Methods: In order to study the effect of seed physical pre-treatment and drought stress on seed germination characteristics of Niger, an experiment was conducted as factorial in a completely randomized design with three replications at the Research Laboratory of Seed Science and Technology at Shahrekord University. Different magnetic field intensities at five levels including (0, 50, 100, 150 and 200 mT (at 5 minutes period)) as the first factor and drought stress at five levels (0, -4, -5, -6 and -7 bar Polyethylene Glycol6000) as the second factor were considered.
Results: The results of variance analysis showed that the effect of drought stress, magnetic field intensity and their interaction were significant on all of the evaluated characteristics. The maximum germination percentage and rate and the minimum of T10 and T50 were observed in 50 mT field intensity under normal conditions. The minimum germination index under normal conditions and the maximum length and shoot dry weight under non-treatment conditions and the maximum root and shoot fresh weight in 200 mT field intensity under normal conditions were obtained. The maximum root length and dry weight were observed in 50 and 100 mT field intensity under normal conditions, respectively. 
Conclusions: Seeds which cross through a magnetic field, become swollen and probably as a result, the activity of auxin hormone in these seeds increases. In addition, the respiration level also increases in them and they have higher levels of energy and activity, which results in faster and more uniform germination and the creation of stress-resistant plants. In this study, although by increasing drought stress intensity, negative effects were observed on germination characteristics, the magnetic field under these conditions improved some germination characteristics. In general, for the purpose of improving germination and alleviating drought stress conditions, for 0, -5 and -7 bar potentials, the field intensity of 50 mT and for -4 and -6 bar potentials, the field intensity of 150 mT are recommended.
 
Highlights:
  1. The effect of magnetic field on germination of multipurpose seed of Niger plant.
  2. The effect of drought stress on germination of multipurpose seed of Niger plant, given Iran’s being located in dry belt.
  3. The positive effect of magnetic field on germination of Niger seed to improve the negative effects of drought stress.
Keywords: Germination percentage, Magnate, Osmotic stress, Physical priming
DOR: 98.1000/2383-1251.1397.5.33.9.1.1578.1610
Full-Text [PDF 1499 kb]   (781 Downloads)    
Type of Study: Research | Subject: General
Received: 2017/11/28 | Accepted: 2018/06/21

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