Volume 7, Issue 1 ((Spring and Summer) 2020)
Iranian J. Seed Res. 2020, 7(1): 151-164 |
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Jangjoo F, Tajbakhsh-shishvan M. (2020). Effect of Different Pre-Treatments on Germination Indices and Chromosomal Aberrations of Aged Onion Seeds (Allium cepa). Iranian J. Seed Res.. 7(1), : 10 doi:10.29252/yujs.7.1.151
URL: http://yujs.yu.ac.ir/jisr/article-1-443-en.html
URL: http://yujs.yu.ac.ir/jisr/article-1-443-en.html
Urmia University , m.tajbakhsh@urmia.ac.ir
Abstract: (7112 Views)
Extended abstract
Introduction: Seed deterioration is a physiological phenomenon that affects all germination, biochemical, cytological, and growth characteristics of plants. So it is necessary to use seed vigor enhancement methods to resolve these problems. One of these methods is the application of seed priming techniques to reduce deterioration effects. Therefore, the present study aimed to investigate the effect of different pre-treatments by using Nano-zinc, ascorbic acid, humic acid, gibberellin and KNO3 on germination indices and chromosomal aberration of aged onion seeds.
Material and Methods: This experiment was performed as factorial based on a completely randomized design with 3 replications (100 seeds per replicate) in the faculty of agriculture at Urmia University. The first factor was the level of aging at 4 levels (control, 12h, 24h, and 48h) and the second factor was seed pre-treatments at 6 levels (control, Nano-zinc (30 mg), ascorbic acid (100 mg), humic acid (150 mg), gibberellin (200 mg/l) and KNO3 (0.1%). Given that the germination was not similar at different levels of aging, the seeds were germinated at control and 12h of aging after 6 days, at 24 and 48h of aging after 8 and 9 days, respectively. Hence, germination percentage, germination rate, normal seedling, mean germination time, and seed vigor were evaluated after the mentioned times. Chromosomal aberrations were also examined.
Results and Discussion: The results showed that the interaction effect of aging and seed pre-treatments on germination indices were significant at %1 probability level. By increasing the period of aging, all germination characters decreased significantly. The highest germination percentage (80%, 70%, 50%) and germination rate (5.350, 3. 316, 1.525 seed/day) were obtained by using Nano-zinc At 12h, 24h and 48h ageing levels. Nano-zinc and gibberellin had the highest effect on seedling vigor and normal seedlings. Seedling vigor increased significantly by using Nano-zinc and gibberellin at 12h (1133, 933.9), 24h (742.9, 692), and 48h (369.9, 323.3). The chromosomal aberration was reduced by using pre-treatment.
Conclusion: In this study, the most effective pre-treatments to improve germination characteristics and reduce chromosomal aberrations were gibberellin (200 mg/l) and Nano-zinc (30 mg). Therefore, it can be stated that the use of Nano-zinc and gibberellin as seed pre-treatments can significantly reduce the effects of deterioration on onion seeds.
Highlights:
1- Nano-Zinc and gibberellin were the most effective priming treatments on seed germination and growth characteristics of the aged onion seeds.
2- Priming treatment reduced the percentage of chromosomal aberration in the onion and the highest effect was obtained using Nano-zinc and gibberellin.
Article number: 10
Keywords: Ascorbic acid, Accelerated aging, Gibberellin, Germination indices, Nano-zinc, Chromosomal aberration
Type of Study: Applicable |
Subject:
Seed Physiology
Received: 2019/10/9 | Revised: 2021/03/10 | Accepted: 2020/02/1 | ePublished: 2020/11/29
Received: 2019/10/9 | Revised: 2021/03/10 | Accepted: 2020/02/1 | ePublished: 2020/11/29
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