Nasrin Teimoori; Mohsen Saeidi; Mahmoud Khoramivafa; Shahab Khoshkhoi
Abstract
Seed priming has been introduced as an effective and practical mechanism for increasing seed germination resistance and creating more vigorous seedlings against abiotic stresses such as drought and salinity. Therefore, this research was carried out as a factorial experiment to investigate the effect ...
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Seed priming has been introduced as an effective and practical mechanism for increasing seed germination resistance and creating more vigorous seedlings against abiotic stresses such as drought and salinity. Therefore, this research was carried out as a factorial experiment to investigate the effect of priming chickpea seeds with iron oxide nanoparticle and bulk forms on the germination characteristics of chickpea cultivar Adel under salinity stress. The test factors include 1) seed priming with iron oxide bulk and nanoparticles 1-100 nm and 40-60 nm in three concentrations of 2, 4, 8 mg l-1, hydro-prime and non-prime, and 2) salinity stress (30, 60, 90 mM of sodium chloride). he results showed that the salinity of 90 mM completely stopped the germination. Levels of 30- and 60-mM salinity caused a 23 and 63% decrease in germination and 72 and 89% decrease in germination rate, respectively. Prime treatments significantly increased germination percentage and rate, mean daily germination, seed vigor, and allometric coefficient, and significantly decreased abnormal seedlings, especially at 60 mM of salinity. Salinity stress was observed to affect the germination rate more than the germination percentage. The most effective seed priming treatments were iron oxide bulk and nanoparticles 40-60 nm, 8 mg l-1. Interestingly, the iron oxide nanoparticles showed no significant advantage over the bulk iron oxide. These findings suggest that priming treatments can enhance the salt resistance of chickpeas during the germination stage.
N. Fathi; M. Heidari; K. Behnam Far
Abstract
At present experiment, the effects of moist stratification duration (at 7+1 oC) on seed germination and early seedling growth of three genotype of wild almond (Prunus scoparia) from Khuzestan province (southwest of Iran) were investigated. The seeds of P. scoparia were selected from wild almond trees ...
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At present experiment, the effects of moist stratification duration (at 7+1 oC) on seed germination and early seedling growth of three genotype of wild almond (Prunus scoparia) from Khuzestan province (southwest of Iran) were investigated. The seeds of P. scoparia were selected from wild almond trees in Masjed Sloeyman, Izeh and Dezful regions. After tip pinching, seeds of each genotype were stratified for 0, 15, 30 and 45 days. Results of germination test showed that stratification for 45 days increased seed germination percentage, seed germination rate and early seedling growth of all three genotype. The highest germination percentage were 68, 69 and 71 for Masjed Sloeyman, Izeh and Dezful, respectively. Seedling growth indices of each genotype (vigor index, root and shoot length and seedling dry weight) were increased after stratification for 30 to 45 days and also differences among responses of genotypes were statistically significant. The lowest germination vigor (0 and 43.75, respectively) were observed in seeds of Masjed Sloeyman and Dezful without stratification after 15 days stratification and for seeds of Masjed Sloeyman (84.5) after 30 days. Overall, results indicated that the stratification for 45 days after removal of seed coat and origin of seed significantly affect the germination and early seedling growth of P. scoparia genotypes form Khuzestan.
