F. Sharifzadeh; Arezoo Espanany; Mohammad Reza Naghavi
Abstract
In this research, the effect of different seed priming treatments was investigated on seed germination parameters of Securigera securidaca seeds in the low temperature stress conditions. Seeds first were exposed to eight temperature levels (5, 10, 15, 20, 25, 30, 35 and 40 ° C). Experimental treatments ...
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In this research, the effect of different seed priming treatments was investigated on seed germination parameters of Securigera securidaca seeds in the low temperature stress conditions. Seeds first were exposed to eight temperature levels (5, 10, 15, 20, 25, 30, 35 and 40 ° C). Experimental treatments included different priming treatments (hydropriming, osmopriming including potassium nitrate and calcium chloride and no priming). The results showed that temperature significantly reduced germination percentage and rate, seedling length and seedling dry weight, normal seedling percentage and seed vigor. 5 mM of calcium chloride treatment at 10 ° C for 20 hours had the highest germination percentage, and 1% of potassium nitrate treatment at 10 ° C for 20 hours had the maximum seedling dry weight and 0.5% of potassium nitrate at 10 ° C for 20 hours and 10 mM of calcium chloride treatments at 15 ° C for 20 hours had the highest percentage of normal seedlings. Hydropriming treatment at 15 ° C for 20 hours had the highest germination rate, seedling length and seed vigor and was also one of the best treatments in terms of normal seedling percentage. So this treatment can be introduced as a suitable treatment for this plant because it is better in most germination traits and it is easier and cheaper to do.
Mohammad khademi; Faezeh Zaefarian; Shahram Nazari; Mohammad Ali Esmaelee
Abstract
In order to investigate the effect of hydropriming and osmopriming on the characteristics of experimental rice seedlings, the treatment was performed in a completely randomized design in three replications.Treatments included two rice cultivars (Tarom and Shiroudi) and priming at five levels including ...
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In order to investigate the effect of hydropriming and osmopriming on the characteristics of experimental rice seedlings, the treatment was performed in a completely randomized design in three replications.Treatments included two rice cultivars (Tarom and Shiroudi) and priming at five levels including calcium chloride and potassium chloride priming (Ψs -1.25 MPa), ascorbate acid (10 mg l-1), hydropriming (for 48 hours) and control (no priming). In this study, seedling characteristics were measured. Interaction of cultivar and priming showed that the highest germination percentage was observed in the range of 97-100% in Shiroudi and Tarom cultivars primed with calcium chloride and potassium chloride. The lowest germination percentage (85.33% and 77.33%, respectively) was obtained under control in Shiroudi and Tarom cultivars, respectively. The highest germination rate was obtained in priming with calcium chloride and potassium chloride, which increased the germination rate by 52 and 54%, respectively. The effect of cultivar and priming on root and shoot length as well as root and shoot dry weight were significant at 1% probability level. also, root and shoot length were 5.97 and 5.4 cm in Shiroudi and 4.01 and 4.59 cm in Tarom, respectively. The results showed that priming with calcium chloride, potassium chloride, ascorbic acid and water increased seedling length vigor indices 69, 64, 13 and 32% in Shiroudi and 91, 70, 47 and 43% in Tarom, respectively compared to control. Also, priming with calcium chloride, potassium chloride, ascorbic acid and water increased seedling weight vigor indices by 110, 95, 50 and 47%, respectively.
