Ali Ebadi; Fatemeh Ahmadnia
Abstract
One of the most critical limiting factors for cowpea seed germination (Vigna unguiculata subsp. unguiculata) is drought stress. This study aimed to examine the effect of seed priming with titanium dioxide (TiO₂) nanoparticles (NPs) under drought stress conditions, using a factorial experiment in a ...
Read More
One of the most critical limiting factors for cowpea seed germination (Vigna unguiculata subsp. unguiculata) is drought stress. This study aimed to examine the effect of seed priming with titanium dioxide (TiO₂) nanoparticles (NPs) under drought stress conditions, using a factorial experiment in a completely randomized design with three replications. Treatments included seed priming with TiO₂ NPs at concentrations of 0, 25, and 50 mg L⁻¹ and drought stress levels at 0, -0.025, -0.050, -0.075, and -0.1 MPa induced by polyethylene glycol 6000. Results showed broad absorption peaks in the ranges of 800–500 cm⁻¹ and 3600–3200 cm⁻¹, corresponding to Ti-O-Ti and O-H stretching vibrations, respectively. The TiO₂ NPs exhibited a spherical shape. Increasing drought stress significantly decreased germination percentage and both length and weight indices of the seedlings. The lowest germination percentage was recorded at -0.1 MPa osmotic potential, with a 83% reduction compared to the control. Seed priming with TiO₂ NPs at 25 and 50 mg L-1 did not significantly affect germination; however, the 50 mg L-1 concentration had a negative impact on seed germination traits. Seed priming at 25 mg L⁻¹ increased seedling plumule length by 15%. Additionally, the seed vigor index increased at this concentration across all drought stress levels. Catalase enzyme activity and proline content at (-0.1 MPa) osmotic potential increased by 18% and 56%, respectively, compared to the control. These results demonstrate a concentration-dependent effect of TiO₂ NPs in enhancing germination and the length and weight indices of cowpea seedlings.
Zeinab Saboohi sabooni; Reza Tavakkol Afshari; Ghorban Ali Asadi
Abstract
This research was conducted to investigate the effect of camellia seed coating on germination characteristics under salinity stress conditions. The experiment was conducted as a factorial in a completely randomized design with three replications. Humic acid, polymer, micro elements, gibberellic acid, ...
Read More
This research was conducted to investigate the effect of camellia seed coating on germination characteristics under salinity stress conditions. The experiment was conducted as a factorial in a completely randomized design with three replications. Humic acid, polymer, micro elements, gibberellic acid, combination of humic acid with polymer, combination of humic acid and polymer and micro elements, combination of humic acid and polymer and Micro elements and gibberellic acid were used for coating. The stress levels were applied at four levels (0) control, 150, 180, 210 mM. The studied traits included seed germination percentage andseed rate , root and shoot length and dry weight of seedling. The results showed that the polymer coating, the combination of humic acid with polymer, gibberellic acid increased some of the different characteristics of germination in moderate and severe stress levels and were suitable for these stress levels. Polymer coating in salinity stress of 150 mM and 180mM increased seedling length (36.48%, 32.19%) and dry weight (80.95%, 75%) compared to control Also, the combination of polymer coating with humic acid increased seedling length (34.35%, 28.45%) and seedling dry weight (69.23%, 87.50%) and gibberellic acid coating at 210 mM salinity stress compared to the control. It caused a 17.84% increase in seedling length and a 60.62% increase in dry matter. In general, polymer coating and polymer combination with humic acid and gibberellic acid in salinity stress of 150, 180 and 210 mM increased seedling length and dry weight compared to the (0) control.
Elnaz Cheraghi Taghostani; Yousef Sohrabi; Hedieh Badakhshan
Abstract
Seed priming is a technique employed to enhance the speed and uniformity of seed germination. To investigate the effect of seed priming on the germination characteristics of Lallemantia iberica seeds, two factorial experiments based on a completely randomized design were conducted in the greenhouse of ...
Read More
Seed priming is a technique employed to enhance the speed and uniformity of seed germination. To investigate the effect of seed priming on the germination characteristics of Lallemantia iberica seeds, two factorial experiments based on a completely randomized design were conducted in the greenhouse of the Faculty of Agriculture, Kurdistan University, during 2021. The experimental factors included seed priming (priming with auxin, gibberellic acid, salicylic acid, ascorbic acid, hydrated zinc sulfate, and a control) and irrigation levels (100%, 70%, and 40% of soil field capacity). In these experiments, plants derived from primed seeds were cultivated under different irrigation regimes, and their resulting seeds were evaluated for germination-related traits. In the seeds obtained from both experimental trials, the highest germination percentage (96.67%), germination rate (14.22), and seedling dry weight (0.117 g) were observed in seeds primed with gibberellic acid under full irrigation conditions. Under water stress conditions, the germination percentage of seeds resulting from auxin and zinc sulfate priming treatments was 88.89% and 88.6% in the first experiment, respectively, and 85.4% and 85.8% in the second experiment. These treatments increased seed germination by 5.83% and 5.5% in the first experiment, and 1.3% and 1.8% in the second experiment, respectively, compared to the control. It is inferred that certain priming methods, including priming with gibberellic acid, auxin, and zinc sulfate, had a more significant impact on traits such germination percentage and speed, and seedling dry weight compared to other treatments, though environmental factors during maternal plant growth may limit seed priming effectiveness.
Haniyeh Saadat; Mohammad Sedghi
Abstract
In order to investigate The effect of gibberellin priming on physiological and biochemical characteristics of quinoa seedlings under salinity stress, an experiment was conducted based on completely randomized design arranged in factorial with three replications at University of Mohaghegh Ardabili in ...
Read More
In order to investigate The effect of gibberellin priming on physiological and biochemical characteristics of quinoa seedlings under salinity stress, an experiment was conducted based on completely randomized design arranged in factorial with three replications at University of Mohaghegh Ardabili in 2024 with 3 replications. Treatments were four salinity levels (0, 150, 300 and 450 mM Derived from sodium chloride) and four levels of gibberellin (0, 100, 150 and 200 ppm). The results showed that salinity stress reduced Germination Percentage, Germination Coefficient, Mean Daily Germination and seedling fresh weight. But priming with distilled water, different levels of gibberellin, especially the 200 ppm level, improved these traits. The highest Seedling Dry Weight (SDW, 0.430 gr), Seed Length Vigor Index (16.670) and Seed Weight Vigor Index (42.147) were observed in priming with gibberlin and without salinity. The total protein content and the amount of potassium in the treatment with gibberellin 200 ppm and without salinity compared to the control and 450 mM salinity showed an increase of about 95 and 80%, respectively. The amount of sodium in priming with gibberellin 200 ppm and without salinity compared to the the control and 450 mM salinity showed an decrease of 83%, respectively. The maximum amount of malondialdehyde (23.083 nano molg-1FW) was related to the control treatment. With increasing salinity, the amount of proline increased, but the use of gibberellin with a concentration of 200 ppm increased this trait about 53% compared to the control.
zahra karami; Ali Moradi; Hojatollah Latifmanesh; Hamidreza Balouchi
Abstract
One of the most important problems of camelina in cold regions is the interaction of seed germination stage and establishment with cold stress, the use of seed priming technology can be effective in this regard. This study aimed to investigate the effect of priming and drying methods on germination and ...
Read More
One of the most important problems of camelina in cold regions is the interaction of seed germination stage and establishment with cold stress, the use of seed priming technology can be effective in this regard. This study aimed to investigate the effect of priming and drying methods on germination and some biochemical characteristics of camelina under low temperature,, research was carried out in the Agronomy and Genetics Laboratory of the Faculty of Agriculture of Yasouj University during 2021-2022. A split factorial experiment was conducted in a completely randomized design with four replications in which the main plot consisted of low temperature at four levels (5, 10, 15 and 20 °C), a sub-factor including priming hormone using salicylic acid (0.25, 0.5, 0.75 and 1 mM) and gibberellic acid (at three levels of 50, 100 and 150 mg/L) and drying method for primed seed was done in two levels (rapid and normal method). It was observed that the drying method and priming treatment affected the biochemical and germination parameters of Camellina. In most of the studied temperatures, priming with gibberellic acid with concentrations of 100 and 150 mg/L with slow drying method had the highest proline content and could improve germination indices of Camellia seed. The most effective method was normal (slow) drying method among drying treatments. Based on the results of the experiment, it can be stated that applying priming with hormones while improving the physical characteristics of the Camellia seed, helps germination under optimum conditions and low temperature.
Mohamadreza Shahpasand; Maryam Mahmoodi; Javad Ghasemi; Hasan Alipour
Abstract
The successful implementation of technology development projects in the agricultural sector, is strongly dependent on the technology and market readiness level. Although, until now, a huge collection of knowledge and technology has been presented by the Agricultural Research, Education and Extension ...
Read More
The successful implementation of technology development projects in the agricultural sector, is strongly dependent on the technology and market readiness level. Although, until now, a huge collection of knowledge and technology has been presented by the Agricultural Research, Education and Extension Organization, as the largest custodian of research in the agriculture and natural resources sector of Iran, it has not been able to effectively direct some of its product research findings according to the needs of the market or commercialize its knowledge and technology into the market. According to the statistics provided by the Organization's Technology Affairs Office in 2019, out of about 1700 technologies produced in this organization, 190 technologies (11%), have been commercialized. Therefore, it is necessary that the status of the research achievements of this organization in terms of the degree of technology and market readiness to accept these technologies should be examined and diagnosed, and by eliminating or reducing the effect of the identified challenges, a comprehensive and strategic plan should be drawn. Therefore, the main purpose of this research is to investigate the level of technological readiness and the level of market readiness of crop seed coating (phase 1 of cereals) as one of the research achievements of the organization in the field of agricultural sciences.
