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Showing 7 results for Sedghi
Mohammad Sedghi, Farzaneh Hasani, Raouf Seyed Sharifi,
Volume 1, Issue 2 ((Autumn & Winter) 2015)
Volume 1, Issue 2 ((Autumn & Winter) 2015)
Abstract
Application of zinc can improve the tolerance and resistance of plants especially sunflower to environmental stresses and be effective on kernel set and yield. To investigate the effects of zinc oxide nanoparticles on the length, effective period, the rate of kernel filling and kernel weight in sunflower cultivars, a factorial experiment based on randomized complete block design with three replications was conducted at the University of Mohaghegh Ardabili, Ardabil, Iran. Treatments were three sunflower cultivars as Aline 191, Aline 122 and Farrokh and three concentrations of nano zinc oxide including 0, 0.5 and 1 g lit-1 which sprayed at three stages. Results showed that interaction of cultivar and nano zinc oxide was significant on kernel filling rate, the effective period of kernel filling, maximum kernel weight and duration of kernel filling. The rate of filling and maximum kernel weight increased with 0.5 g lit-1 spraying of Nano zinc oxide in Aline 191 and 122, but in Farrokh cultivar was significantly reduced in comparison to the control. Also, no significant difference was found between 0, 0.5 and 1 g lit-1 of nano zinc oxide on kernel filling rate, effective kernel-filling period and duration in Farrokh cultivar. In conclusion, foliar application of zinc oxide nanoparticles led to the improvement of kernel weight and their filling parameters and the more appropriate response was observed in foreign cultivars for this treatment, while final kernel weight decreased in Farrokh cultivar. Therefore, it can be used 0.5 g lit-1 of nano zinc oxide for increasing grain yield in foreign cultivars of Aline.
Effat Ghaviazm, Mohammad Sedghi, Raouf Seyed Sharifi,
Volume 2, Issue 2 ((Autumn & Winter) 2016)
Volume 2, Issue 2 ((Autumn & Winter) 2016)
Abstract
Marigold (Calendula officinalis) is a medicinal plant belonging to the Asteraceae family, which seems necessary the review of its various features especially the improvement of reproduction in order to the development of vegetation and extraction of raw pharmaceutics materials. In order to study the effects of seed hardening on the quality of seeds harvested from different positions of inflorescence on the storability of pot marigold, an experiment conducted at the University of Mohaghegh Ardabili in 2011. Seeds hardened before planting with CaCl2 2% and distilled water. At harvest, the seeds collected from both inner and outer regions of the inflorescence from storage experiments in the laboratory. Harvested seeds stored for six months at 40°C. Then an experiment conducted as factorial based on a completely randomizes design with four replications at the laboratory. Results showed that the highest germination percentage (96%), rate (3.91 day-1), radicle length (5.71 cm) and seed residual dry weight (0.061 g) were related to outer positioned seeds. The highest plumule length (4.79 cm) and seedling dry weight (0.016 g) obtained from outer seeds hardened with distilled water. In conclusion, for best stability results of pot marigold seeds, it is recommended to harden seeds before planting with water and harvest outer seeds from the inflorescence.
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Narjes Hojati Fahim, Mohamad Sedghi, Mehrdad Chaeichi, Rraouf Seyed Sharifi,
Volume 6, Issue 1 ((Spring and Summer) 2019)
Volume 6, Issue 1 ((Spring and Summer) 2019)
Abstract
Extended Abstract
Introduction: Iran is located in the arid and semi-arid regions of the world with an average rainfall of 240 mm per year, which requires rethinking of the adoption of methods. One of the alternative ways is to use organic and biological fertilizers. Biological fertilizers are considered as the main and the most important factor in the integrated management of plant foods for sustainable agriculture as they play an important role in product improvement and efficiency. Therefore, this research was carried out with the aim of investigating the effect of seed pre-treatment with some organic and biological fertilizers in rainfed wheat.
Materials and Methods: A factorial experiment with three replications was conducted at the Laboratory of Seed and Plant Certification and Registration of the Center of Agriculture and Natural Resources Research located in Hamedan. Seed inoculation was considered in 5 levels (Seafull, Disper Root Gs., Bio-Health, Trichodermin and control) on 8 different rainfed wheat cultivars (Azar-2, Hashtrood, Baran, Rasad, Owhadi, Sardari, Takab and Homa). First, the seeds were disinfected with sodium hypochlorite, and were then cultured in special containers and were placed in the germinator at 20 ° C. After 4 and 8 days, the number of germinated seeds was counted. Germination seeds were counted in each treatment and germination indices such as germination rate, average daily germination, coefficient germination rate, longitudinal vigor index, weight vigor index, seedling fresh weight, root length/shoot ratio, shoot fresh weight, root fresh weight, seed reserve utilization rate, seed reserve utilization efficiency, fraction utilization seed reserve, seed dry weight were calculated.
Results: With application of different levels of fertilizer, the rate of germination treatment Homa×Bio-Health (155%), average daily germination treatment Hashtrood×Bio-Health (69%), coefficient germination rate treatment Owhadi×Disper Root Gs (60%), longitudinal vigor index treatment Owhadi×Bio-Health (108%), weight vigor index treatment Homa×Bio-Health (64%), root fresh weight treatment Hashtrood×Disper Root Gs (106%), shoot fresh weight treatment Hashtrood×Seafull (23%), seedling fresh weight treatment Homa×Bio-Health (42%), root length/shoot ratio treatment Owhadi×Trichodermin (75%), seed reserve utilization rate treatment Homa×Bio-Health (118%), and fraction utilization seed reserve treatment Homa×Bio-Health (119%) increased, compared with the control. In addition, the application of Bio-Health fertilizer and Hashtrood cultivar had the highest amount in almost all the mentioned attributes
Conclusion: Investigation of the different levels of fertilization showed that in most of the indices related to germination and heterotrophic growth of seedling, pretreatment with Bio-Health biofertilizer had a significant difference with other fertilizer levels.
Highlights:
- Evaluation of germination indices for recent cultivars of rainfed wheat, released by rainfed Research Institute of Iran.
- Investigating and comparing fertilizers with various multifactorial compounds (fungi and bacteria) and with each other.
- Conducting research on commercial compounds and comparison of live biochemical and non-organic matters in a single experiment.
Khadijeh Sourazar, Mohammad Sedghi, Raouf Seyed Sharifi,
Volume 9, Issue 1 ((Spring and Summer) 2022)
Volume 9, Issue 1 ((Spring and Summer) 2022)
Abstract
Extended Abstract
Introduction: The germination stage ensures the durability, establishment, and final yield of plants. The final density of plants per unit area is resulted when the planted seeds germinate fully and with adequate rate. Plants mainly undergo abiotic stresses that are a considerable constraint for agricultural production worldwide. Seed priming is one of the simplest and cheap methods to improve seed germination, acceleration of seedling growth and establishment, uniformity, reduction of flowering time, vigorous seedling production, etc which leads to improved quality and yield of crop under stressful and non-stressful conditions. This study aimed to investigate the effect of different types of priming on enzymatic and physiological changes of French bean seed under cobalt chloride stress conditions.
Materials and Methods: To examine the effect of priming on germination indices, the activity of antioxidant enzymes and proteins in French bean under cobalt chloride stress, a factorial experiment was performed in a completely randomized design with three replications. These factors included four levels: seed priming with 100 mg / l salicylic acid and mannitol, control and distilled water (no priming), and three levels of cobalt chloride stress (0, 100, and 200 mg / l).
Results: The results showed that with increasing cobalt chloride concentration, germination indices (germination rate, root length, root fresh weight, stem fresh weight and stem dry weight) decreased. However, in the pretreatment of distilled water, salicylic acid, and mannitol there was a significant increase in germination indices (mean germination time, radicle length, plumule length, fresh radicle weight, and weight plumule) was observed. The interaction effect of priming and cobalt chloride caused an increase in radicle dry weight compared to control × stress treatment. The highest values of fresh radicle weight (14.4 g), dry weight of plumule (0.27 g), and plumule length (0.17 cm) were obtained in hydro priming pretreatment. The results also showed that hormone priming under stress conditions of 200 and 100 mg / l cobalt chloride increased protein content and polyphenol oxidase activity of French bean seedlings compared with the control treatment, respectively. Osmo priming increased the activity of catalase and peroxidase enzymes under stress and non-stress conditions resulted by 200 mg / l cobalt chloride.
Conclusion: according to the results of the present study, cobalt chloride reduced some physiological and biochemical traits of French bean seeds. However, the French bean has a relatively high cobalt chloride tolerance capacity, so that it showed good tolerance to different concentrations of cobalt chloride for up to 9 days.
Highlights:
1- The effect of different concentrations of cobalt chloride and different types of priming on the germination of French bean seeds was investigated.
2- French bean seedling protein content increased under the influence of hormone priming.
Introduction: The germination stage ensures the durability, establishment, and final yield of plants. The final density of plants per unit area is resulted when the planted seeds germinate fully and with adequate rate. Plants mainly undergo abiotic stresses that are a considerable constraint for agricultural production worldwide. Seed priming is one of the simplest and cheap methods to improve seed germination, acceleration of seedling growth and establishment, uniformity, reduction of flowering time, vigorous seedling production, etc which leads to improved quality and yield of crop under stressful and non-stressful conditions. This study aimed to investigate the effect of different types of priming on enzymatic and physiological changes of French bean seed under cobalt chloride stress conditions.
Materials and Methods: To examine the effect of priming on germination indices, the activity of antioxidant enzymes and proteins in French bean under cobalt chloride stress, a factorial experiment was performed in a completely randomized design with three replications. These factors included four levels: seed priming with 100 mg / l salicylic acid and mannitol, control and distilled water (no priming), and three levels of cobalt chloride stress (0, 100, and 200 mg / l).
Results: The results showed that with increasing cobalt chloride concentration, germination indices (germination rate, root length, root fresh weight, stem fresh weight and stem dry weight) decreased. However, in the pretreatment of distilled water, salicylic acid, and mannitol there was a significant increase in germination indices (mean germination time, radicle length, plumule length, fresh radicle weight, and weight plumule) was observed. The interaction effect of priming and cobalt chloride caused an increase in radicle dry weight compared to control × stress treatment. The highest values of fresh radicle weight (14.4 g), dry weight of plumule (0.27 g), and plumule length (0.17 cm) were obtained in hydro priming pretreatment. The results also showed that hormone priming under stress conditions of 200 and 100 mg / l cobalt chloride increased protein content and polyphenol oxidase activity of French bean seedlings compared with the control treatment, respectively. Osmo priming increased the activity of catalase and peroxidase enzymes under stress and non-stress conditions resulted by 200 mg / l cobalt chloride.
Conclusion: according to the results of the present study, cobalt chloride reduced some physiological and biochemical traits of French bean seeds. However, the French bean has a relatively high cobalt chloride tolerance capacity, so that it showed good tolerance to different concentrations of cobalt chloride for up to 9 days.
Highlights:
1- The effect of different concentrations of cobalt chloride and different types of priming on the germination of French bean seeds was investigated.
2- French bean seedling protein content increased under the influence of hormone priming.
Haniyeh Saadat, Mohammad Sedghi, Raouf Seyed Sharifi, Salim Farzaneh,
Volume 9, Issue 2 ((Autumn & Winter) 2023)
Volume 9, Issue 2 ((Autumn & Winter) 2023)
Abstract
Introduction: Today, population growth has placed a significant burden on global agricultural resources. As a result, meeting global food demand and increasing farmers' incomes has become a challenging task. Salinity is one of the most harmful factors in the arid and semi-arid regions of the world that influences crop production. Seed priming is a technology by which seeds are physiologically and biochemically prepared for germination before being placed in their bed and exposed to the ecological conditions of the environment. The aim of this study was to evaluate the efficiency of the effect of chitosan on bean germination indices under salt stress.
Materials and Methods: The experiment was conducted as factorial based on a completely randomized design with four replications in a row (tube or sandwich culture) between filter paper at the University of Mohaghegh Ardabili in 2021. Treatments included four salinity levels (0, 50, 100, and 150 Mm) and four chitosan levels (0, 25, 50, and 75% by weight volume), all of which had been dissolved in 1% acetic acid. The studied traits included germination coefficient, allometric coefficient, daily germination rate, mean daily germination, seedling length and weight index, radicle length, plumule length, seedling length, radicle fresh and dry weight, plumule fresh and dry weight and residual dry weight. Data analysis was performed using the SAS 9.2 software and Duncan's test at p<0.05 probability level was used for mean comparison.
Results: The results showed that salinity stress decreased allometric coefficient (AC), seedling length vigor index (SLVI), radicle and seedling length (RL and SL), and radicle fresh and dry weight (RFW and RDW) and increased daily germination rate (DGS) and residual dry weight (RDW). Seed pretreatment with chitosan increased AC, SLVI, RL, SL, RFW, and RDW. The comparison of the means showed that there was a significant difference between the levels of chitosan so that the highest number of traits was obtained from the use of 75% chitosan and the lowest was obtained from the chitosan-free treatment. SLVI, SL, and RDW in 75% chitosan pre-treatment were higher at about 31, 26, and 27% compared to the control (priming with distilled water), respectively. The highest AC was observed in priming with 50% chitosan. Comparison of the mean for salinity stress also showed that the highest and lowest values of the measured traits respectively were obtained from the application of 0 and 150 Mm salinity levels. Also, with increasing salinity, chitosan increased germination coefficient (GC), seedling weight vigor index (SWVI), plumule length (PL), and plumule fresh and dry weight (PFW and PDW).
Conclusions: The results of this study show that among the different treatments, pre-treatment of seeds with 75 % Chitosan may be considered an effective way to improve seed germination of bean. It also can reduce the harmful effects of salinity stress on some traits in bean seedlings and improve seedling growth. Also, pretreatment with distilled water is an easy, low-cost and effective way to increase bean seedling germination and growth indices. Farmers can use this method for fast germination and better seedling growth under salt stress conditions.
Highlights:
- The effect of different concentrations of chitosan on the germination of bean seeds was investigated.
- Priming with chitosan increased the allometric coefficient, seedling length vigor index, radicle and seedling length, and radicle fresh and dry weight.
- A suitable method for reducing the harmful effects of salinity and increasing germination indicators of beans was introduced.
Haniyeh Saadat, Mohammad Sedghi, Raouf Seyed Sharifi, Salim Farzaneh,
Volume 10, Issue 2 ((Autumn & Winter) 2023)
Volume 10, Issue 2 ((Autumn & Winter) 2023)
Abstract
Extended Abstract
Introduction: At present, the increase in population has created an additional burden on the world's agricultural resources. As a result, meeting global food demand and increasing farmers' incomes has become a challenging task. Salinity is one of the abiotic stresses that strongly affects the germination, growth, and yield of crops. Seed priming is a simple technology that hydrates seeds to the point where the metabolic activity for germination is initiated, but no radicle emerges. In fact, the seeds are physiologically and biochemically ready to germinate before being placed in their bed and exposed to environmental conditions. This research was conducted with the aim of investigating the effect of seed priming with chitosan on germination indices and biochemical traits of beans under salt stress.
Materials and Methods: This experiment was conducted at the University of Mohaghegh Ardabili in 2021 as a factorial in the form of a completely randomized design with four repetitions. The treatments included four levels of salinity (0, 50, 100, and 150 mM) and four levels of chitosan (0, 0.25, 0.50, and 0.75% w/v), all of which were dissolved in 1% acetic acid.
Results: The results showed that salinity stress decreased germination percentage (GP), Peak value (PV), and germination value (GV). However, seed priming with different levels of chitosan, especially 0.75% chitosan, improved GP, PV, and GV by 7, 21, and 17%, respectively, compared to the control. With increasing salinity, the amount of proline and polyphenol oxidase enzyme activity increased, but the application of chitosan 0.75% increased these traits by 34% and 43%, respectively, compared to the control (priming with distilled water). Electrolyte leakage in priming with 0.75% chitosan decreased by 31% compared to the control, which indicates maintaining the stability of the cell membrane. The amount of soluble sugars in the treatment with 0.75% chitosan and 150 mM salinity showed an increase of about 78% compared to the control. The highest correlation among traits was observed between peak value and germination coefficient (0.995*) and between proline and polyphenol oxidase enzyme (0.917*).
Conclusions: The results of this study show that among the different treatments, pre-treatment of seeds with 75 % Chitosan may be considered as an effective way to improve germination indices and biochemical characteristics of bean and it can be used as a treatment to deal with salinity conditions in bean seedlings and improve the growth of seedlings.
Highlights:
Introduction: At present, the increase in population has created an additional burden on the world's agricultural resources. As a result, meeting global food demand and increasing farmers' incomes has become a challenging task. Salinity is one of the abiotic stresses that strongly affects the germination, growth, and yield of crops. Seed priming is a simple technology that hydrates seeds to the point where the metabolic activity for germination is initiated, but no radicle emerges. In fact, the seeds are physiologically and biochemically ready to germinate before being placed in their bed and exposed to environmental conditions. This research was conducted with the aim of investigating the effect of seed priming with chitosan on germination indices and biochemical traits of beans under salt stress.
Materials and Methods: This experiment was conducted at the University of Mohaghegh Ardabili in 2021 as a factorial in the form of a completely randomized design with four repetitions. The treatments included four levels of salinity (0, 50, 100, and 150 mM) and four levels of chitosan (0, 0.25, 0.50, and 0.75% w/v), all of which were dissolved in 1% acetic acid.
Results: The results showed that salinity stress decreased germination percentage (GP), Peak value (PV), and germination value (GV). However, seed priming with different levels of chitosan, especially 0.75% chitosan, improved GP, PV, and GV by 7, 21, and 17%, respectively, compared to the control. With increasing salinity, the amount of proline and polyphenol oxidase enzyme activity increased, but the application of chitosan 0.75% increased these traits by 34% and 43%, respectively, compared to the control (priming with distilled water). Electrolyte leakage in priming with 0.75% chitosan decreased by 31% compared to the control, which indicates maintaining the stability of the cell membrane. The amount of soluble sugars in the treatment with 0.75% chitosan and 150 mM salinity showed an increase of about 78% compared to the control. The highest correlation among traits was observed between peak value and germination coefficient (0.995*) and between proline and polyphenol oxidase enzyme (0.917*).
Conclusions: The results of this study show that among the different treatments, pre-treatment of seeds with 75 % Chitosan may be considered as an effective way to improve germination indices and biochemical characteristics of bean and it can be used as a treatment to deal with salinity conditions in bean seedlings and improve the growth of seedlings.
Highlights:
- Seed priming using Chitosan improved Germination Indices of seed common bean under Salt Stress.
- Priming with chitosan increased Proline and Polyphenol Oxidase Enzyme.
- The concentration of 0.75 V/W of Chitosan revealed a better effect on germination indices and biochemical characteristics.
- Priming with chitosan can be a suitable method to reduce the negative effects of salinity, increase germination indicators, and improve the biochemical characteristics of beans.
Haniyeh Saadat, Mohammad Sedghi,
Volume 10, Issue 2 ((Autumn & Winter) 2023)
Volume 10, Issue 2 ((Autumn & Winter) 2023)
Abstract
Extended abstract
Introduction: Soybean is very important in the world production of oilseeds. Currently, 55% of the world's oil is supplied by soybean. Seed aging is one of the main problems in agriculture and it is an undesirable feature of agriculture that leads to economic losses. Aging is an irreversible process, but its speed is delayed by proper storage and optimal storage methods, and its storage in inappropriate conditions after harvesting reduces its quality during storage. Priming has a direct and indirect effect on the growth and development of plants, and its indirect effects are more useful than its direct effects. Priming improves the longevity of low-rooted seeds. During the priming of these seeds, a lot of time to repair metabolic damage can occur before any progress in germination, which ultimately prevents further exhaustion. Several studies have shown that seed treatment with sodium nitroprusside during the reaction with reactive oxygen species and increasing the activity of antioxidant enzymes plays an important role in protecting plants against stress. The aim of this study was to the effect of sodium nitroprusside levels on germination indices and antioxidant enzymes activity in soybean seedlings under accelerated aging test.
Materials and Methods: This experiment was conducted in 2023 as a factorial in the form of a completely randomized design with 3 replications at the University of Mohaghegh Ardabili. Experimental treatments included accelerated aging treatment at three levels (0, 24, and 48 hours) and three levels of sodium nitroprusside (0, 100, and 200 ppm).
Results: The results showed that aging reduced germination indicators including Germination Percentage (GP), Germination Value (GV), and Mean Daily Germination (MDG). Also, priming with different levels of sodium nitroprusside, especially the 200 ppm level, improved these traits, but priming with sodium nitroprusside decreased the Mean Germination Rate (MGR) and the Mean Germination Time (MGT). The superoxide dismutase and ascorbate peroxidase enzymes activity in priming with sodium nitroprusside 200 ppm compared to the control showed an increase of 22 and 26%, respectively, in priming with sodium nitroprusside 200 ppm and 48 hours aging compared to the control. Also, the amount of peroxidase enzyme activity in sodium nitroprusside 200 ppm treatment showed an increase of about 34% compared to the control. The lowest catalase enzyme (7.7 units mg protein-1 min-1) was in pretreatment with sodium nitroprusside 100 ppm and without aging.
Conclusions: The results of this study show that among the different treatments, pre-treatment of seeds with sodium nitroprusside 200 ppm may be considered as an effective way to improve germination indices and antioxidant enzymes activity of soybean and it can be used as a treatment to deal with salinity conditions in soybean seedlings and improve the growth of seedlings.
Highlights:
Introduction: Soybean is very important in the world production of oilseeds. Currently, 55% of the world's oil is supplied by soybean. Seed aging is one of the main problems in agriculture and it is an undesirable feature of agriculture that leads to economic losses. Aging is an irreversible process, but its speed is delayed by proper storage and optimal storage methods, and its storage in inappropriate conditions after harvesting reduces its quality during storage. Priming has a direct and indirect effect on the growth and development of plants, and its indirect effects are more useful than its direct effects. Priming improves the longevity of low-rooted seeds. During the priming of these seeds, a lot of time to repair metabolic damage can occur before any progress in germination, which ultimately prevents further exhaustion. Several studies have shown that seed treatment with sodium nitroprusside during the reaction with reactive oxygen species and increasing the activity of antioxidant enzymes plays an important role in protecting plants against stress. The aim of this study was to the effect of sodium nitroprusside levels on germination indices and antioxidant enzymes activity in soybean seedlings under accelerated aging test.
Materials and Methods: This experiment was conducted in 2023 as a factorial in the form of a completely randomized design with 3 replications at the University of Mohaghegh Ardabili. Experimental treatments included accelerated aging treatment at three levels (0, 24, and 48 hours) and three levels of sodium nitroprusside (0, 100, and 200 ppm).
Results: The results showed that aging reduced germination indicators including Germination Percentage (GP), Germination Value (GV), and Mean Daily Germination (MDG). Also, priming with different levels of sodium nitroprusside, especially the 200 ppm level, improved these traits, but priming with sodium nitroprusside decreased the Mean Germination Rate (MGR) and the Mean Germination Time (MGT). The superoxide dismutase and ascorbate peroxidase enzymes activity in priming with sodium nitroprusside 200 ppm compared to the control showed an increase of 22 and 26%, respectively, in priming with sodium nitroprusside 200 ppm and 48 hours aging compared to the control. Also, the amount of peroxidase enzyme activity in sodium nitroprusside 200 ppm treatment showed an increase of about 34% compared to the control. The lowest catalase enzyme (7.7 units mg protein-1 min-1) was in pretreatment with sodium nitroprusside 100 ppm and without aging.
Conclusions: The results of this study show that among the different treatments, pre-treatment of seeds with sodium nitroprusside 200 ppm may be considered as an effective way to improve germination indices and antioxidant enzymes activity of soybean and it can be used as a treatment to deal with salinity conditions in soybean seedlings and improve the growth of seedlings.
Highlights:
- Seed priming using sodium nitroprusside improved germination indices of seed common soybean under Aging.
- Priming with sodium nitroprusside increased antioxidant enzymes activity.
- The concentration of 200 ppm sodium nitroprusside revealed a better effect on germination indices and biochemical characteristics.
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