mohsen malek; Farshid Ghaderi-Far; Benjamin Torabi; HamidReza sadeghipour
Abstract
To investigate the effects of drying methods (desiccation treatment), heat shock and osmotic stress treatments on the viability of primed seeds from different rapeseed cultivars, an experiment was conducted in 2017-2018 at the Seed Research Laboratory of Gorgan University of Agricultural Sciences and ...
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To investigate the effects of drying methods (desiccation treatment), heat shock and osmotic stress treatments on the viability of primed seeds from different rapeseed cultivars, an experiment was conducted in 2017-2018 at the Seed Research Laboratory of Gorgan University of Agricultural Sciences and Natural Resources. In this study, seeds of three canola cultivars i.e. Dk-xpower, Teraper and Hayola50, which had observed priming treatments, were exposed to desiccation, heat shock and osmotic stress treatments. Thereafter, to investigate the effects of different treatments, the treated seeds were subjected to controlled deterioration test. Finally, after fitting the three-parameter logistic model to germination percentage during controlled deterioration test, time for decrease of germination to 50% was Calculated and used as the criterion for comparing seed viability. Results showed that the response of rapeseed cultivars to different treatments were different. Also, priming methods and different treatments in drying phase of primed seeds, displayed different effects on seeds' lifespan. In general, heat shock treatments were found efficient in Dk-xpower and Traper cultivars as they increased seeds' lifespan. In contrast, osmotic stress treatments often had negative effects on seed viability in all canola cultivars. Even, "osmopriming" and subsequent slow drying of primed seeds had more negative effects than "hydroperiming" associated with fast drying methods.
fatemeh hosseinpoor; vali rabiei; mohammadesmaeil amiri; ali soleimani
Abstract
By considering short shelf life time of nectarine fruit and the importance of postharvest physiology, In order to study the effect of nano-packaging with hot water treatment to maintain qualitative characterestics and increase the storage life of nectarines cv. ‘Sunglo‘ an experiment was ...
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By considering short shelf life time of nectarine fruit and the importance of postharvest physiology, In order to study the effect of nano-packaging with hot water treatment to maintain qualitative characterestics and increase the storage life of nectarines cv. ‘Sunglo‘ an experiment was carried out in 2014. The experiment was designed in a CRBD (completely randomized block design) based on factorial with three replications and fruits qualitative characterestics every 10 days, during 40 days storage with 0-1C0 temperature, 90-95 percent RH were measured. The results showed that nano-packaging caused to maintain the vitamin C, titratable acidity and total soluble solids, and also nano-packaging compared to conventional packaging on weight loss, color quality and increasing browning was not significant effect. The amount of pH was decreased during 30 days of storage, then was increased to 40 days. The peroxidase enzyme activity increased with time, but this process in nano-packaging less than control treatment. The flavor index and carotenoids increased with time, but this process was significant decrease in carotenoids during 40 days of storage. Decrease in fruit firmness over time within 30 days of treatment with nano-packaging is lower. The results showed that nano packaging can be a suitable method to increasing the shelf life and maintain quality of nectarine fruit cv. ‘Sunglo‘.
Mohammad Kamalpouradib; Vahid Rouhi; Saadollah Houshmand; Abdolrahman Mohammadkhani; Hamid Zargari
Abstract
Pollen storage could facilitate the date palm hand pollination through saving time and space. The main concern is maintaining pollen viability, which is greatly cultivar dependent and is influenced by storage condition. In this study, to address this issue, the effects of cultivar, storage ...
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Pollen storage could facilitate the date palm hand pollination through saving time and space. The main concern is maintaining pollen viability, which is greatly cultivar dependent and is influenced by storage condition. In this study, to address this issue, the effects of cultivar, storage temperature, and time on pollen germination were investigated. A factorial experiment was laid out in a completely randomized design with three replicates using four cultivars ‘Kazeroon (7013)’, ‘Lar (7035)’, ‘Darab (7016)’ and ‘Qyr-va Karzin (7021)’, four storage temperatures (RT (20 ± 5), 4, -20 and -80°C) and six storage periods (60, 120, 150, 180, 210 and 375 days). Anova of data showed significant effects of variety, storage temperature, storage time and their interactions on pollen germination. The pollen germination rate increased with decreasing temperature. When pollens were stored for up to 150 days, the germination rates of all varieties initially increased then decreased. Overall, the optimum temperature for preserving pollen grains of tested cultivars is -80°C and the highest pollen grain longevity is related to ‘Qyr-va Karzin (7021)’ after one year.