Elahe Nikouee; Maryam Mollashahi; Alireza Moshki; Homan Ravanbaksh
Abstract
Due to the fact that Elaeagnus angustifolia seed has a hard shell, the present study was conducted to investigate the types of appropriate treatments for germination of Elaeagnus angustifolia seed. The experiment was done in Semnan. Seed scarification performed in a completely randomized design with ...
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Due to the fact that Elaeagnus angustifolia seed has a hard shell, the present study was conducted to investigate the types of appropriate treatments for germination of Elaeagnus angustifolia seed. The experiment was done in Semnan. Seed scarification performed in a completely randomized design with three replications (12 seed per replication). Experimental treatments to break dormancy of Elaeagnus angustifolia seed included control, 60% sodium hydroxide for 20 and 30 minutes, 98% sulfuric acid for 20 and 30 minutes, 1% oxygenated water for 10 and 20 minutes, physical scraping, 90°C boiling water for 15 minutes and ice water(5 days at a temperature of zero degrees and then 24 hours at a temperature of 25 degrees for 3 days). The results showed that there was a significant difference at the level of 1 % between the germination treatments of Elaeagnus angustifolia seed including of germination percent, germination rate, and mean time of germination seed vitality index, and seed vegetative traits such as root length, stem length, number of leaflets and seed germination indices. The highest germination percentage was 88.67% in 98% sulfuric acid treatment for 20 minutes. Also, the highest seed vigor index (96%), mean root length(48 mm), mean stem length(60 mm) and average number of leaflets (5.7 number) were observed in this treatment. Totally, the results showed that in all parameters examined that Sulfuric acid treatment of 98% for 20 years obtained the highest values, but two treatments of ice water and boiling water prevented the germination of Oleaster seeds.
Hadi Kalantari Khalilabad; Ali Izadi Darbandi; Ardeshir Qaderi; Seyed Ahmad Sadat Noori; Mohammadreza Labbafi; Maryam Ahvazi
Abstract
The legume family has seed dormancy, which is an evolutionary adaptation that prevents seed germination in adverse ecological conditions and it is very important in preserving plant species. In order to study the effect of various mechanical, hormonal, and physical factors on the dormancy breaking of ...
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The legume family has seed dormancy, which is an evolutionary adaptation that prevents seed germination in adverse ecological conditions and it is very important in preserving plant species. In order to study the effect of various mechanical, hormonal, and physical factors on the dormancy breaking of sophora seeds, an experiment was conducted in the form of a completely randomized design in three replications. The treatments included gibberellic acid, sulfuric acid, hot water, and cold at 4 degrees Celsius in different periods. The results showed that Compared to the very low germination of untreated seeds (0-53%), the application of 75% concentration of sulfuric acid for 15 minutes, improved the germination percentage (95.5%) and also the initial growth of the seedling. The percentage of germination (93%) in the treatment having hot water was significant compared to the control sample (56%). Compared to the very low germination of untreated seeds (0-53%), sulfuric acid (73-95.5%) and soaking in hot water (52-93%) were effective in germination. According to the dormancy failure of bitter gourd seeds in the tested treatments, it can be concluded that the dormancy of bitter gourd seeds is of a mechanical type and related to the physical properties of the seed coat. treatments of hot water and l sulfuric acid can remove seed dormancy in sophora. According to the breaking sophora seeds dormancy in the tested treatments, it can be concluded that the seed dormancy is of a mechanical type and related to the physical properties of the seed coat.
Simin Haghanifar; Marjan Diyanat; Aidin Hamidi; Fereidon Ghasemkhan ghajar; Elias Soltani
Abstract
This research was done in order to find the most effective treatment to break the hardness of Persian camelthorn (Alhagi camelorum) seeds, which is one of the major problems of its cultivation on a large scale. treatments including 98% sulfuric acid (treatments of 25, 30 and 35 minutes) and 100°C ...
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This research was done in order to find the most effective treatment to break the hardness of Persian camelthorn (Alhagi camelorum) seeds, which is one of the major problems of its cultivation on a large scale. treatments including 98% sulfuric acid (treatments of 25, 30 and 35 minutes) and 100°C hot water (treatments of 30 seconds, 1 and 3 minutes) were performed in comparison with the control. The factorial experiment was conducted in the form of a completely randomized design. The results showed that the populations had significant differences in terms of all traits and the difference between seed hardness treatments and their interaction effects for all traits was significant at the 1% level. The results of the findings show that the presence of the hard shell is a physical barrier and it acts as factors limiting germination by preventing the expansion of the embryo or by limiting water absorption and gas exchange. Therefore, applying a series of seed scratching treatments such as sulfuric acid treatment and 100°C water will improve the germination of the camelthorn seed. Because the use of treatments such as sulfuric acid involves problems such as the risk of working with acid, and also due to the cheapness and availability of water, the lack of special facilities and materials, the harmlessness and simplicity of working with it to stimulate germination and remove hardness, 100 °C water for 30 seconds and placement of seeds in 30 °C germinator is the priority for treating Iranian seeds.
ahmad zare; amin lotfi JALALABADI
Abstract
In order to investigate the effect of different treatments on dormancy breaking of Prickly scorpions weed (Scorpiurus muricatus L), three separate experiments were conducted in 2021 at Agricultural Sciences and Natural Resources University of Khuzestan with four replications. experimental treatments ...
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In order to investigate the effect of different treatments on dormancy breaking of Prickly scorpions weed (Scorpiurus muricatus L), three separate experiments were conducted in 2021 at Agricultural Sciences and Natural Resources University of Khuzestan with four replications. experimental treatments consisted of immersion in boiling water (0, 30, 60, 90, 120, 180 seconds), immersion in sulfuric acid (0, 10, 20, 30, 40, 50, 60 and 70 minutes), scarification and soaking (with scarification+ with soaking, with scarification + non soaking, without scarification +with soaking and without scarification and without soaking). The results of boiling water indicated that with increasing soaking time, germination percentage decreased and the highest germination percentage was observed in 30 seconds (85%). under sulfuric acid application conditions, 34% of seeds germinated in 10 minutes and at other times (20 -70 minutes) maximum germination was observed. The highest germination rate in sulfuric acid treatment was predicted to be 52 minutes. The results of scarification and soaking treatments showed that scarification alone led to an increase in germination percentage (92%) and germination decreased to 56% in soaking conditions with scarification. Immersing seeds in sulfuric acid for 50 minutes, application boiling water for 30 seconds and scarification as a solution to braking dormancy of Prickly can be recommended.
ahmad zare; Zeinab Porameri
Abstract
In order to knowledge the dormancy and seed germination of field dodder in response to environmental factors (sulfuric acid (physical dormancy), light, temperature, salinity and drought stress) four separate experiments were conducted at agricultural scientists and natural recourses university of Khuzestan. ...
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In order to knowledge the dormancy and seed germination of field dodder in response to environmental factors (sulfuric acid (physical dormancy), light, temperature, salinity and drought stress) four separate experiments were conducted at agricultural scientists and natural recourses university of Khuzestan. Treatments of sulfuric acid (96%) immersion (0, 10, 20, 30, 60, 90 and 120 m exposure to sulfuric acid), temperature (5, 10, 15, 20, 25, 30, 35, 40, 45°C). Light (light/dark and darkness), salinity (0, 50, 100, 150, 200, 250, 300, 350, 400 and 400 mM) and drought stress (0, -0.2,-0.4, -0.6, -0.8, -1 and -1.2 MPa) were considered. Seed immersion for 30 m increased germination up to 100% while by increasing of seed immersion in sulfuric acid to 120 minutes, germination decreased to 60%. Seed germination were at 10°C (53%), 20 (88%), 25 (100%), 30 (100%), 35 (100%) and 40°C (42%). Germination of field dodder wasn’t dependent on light. The salinity required to 50% inhibition for traits germination percentage, germination index and germination rate were predicted 154.89, 139.71 and 119.11mM respectively. From the results of drought stress indicated that for 50% inhibition of germination percentage, germination index and germination rate (logistic equation) were predicted -0.57, -0.43 and 0.52 MPa respectively.
