seyed abbas Mirjalili; elahe poorazizi
Abstract
Parsley, which today is classified as a vegetable, has many properties and is used in food and pharmaceutical industries. The seeds of the native populations of this plant do not have a good germination percentage and many efforts are being made to improve the growth and germination of the seeds. In ...
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Parsley, which today is classified as a vegetable, has many properties and is used in food and pharmaceutical industries. The seeds of the native populations of this plant do not have a good germination percentage and many efforts are being made to improve the growth and germination of the seeds. In order to investigate the seed germination rate of native stands and the effect of hydropriming treatment in increasing the germination power of the seeds of these stands, an experiment was conducted in the form of a completely randomized design at four time levels (12, 24, 48 and 72 hours) against the control and with four replications among 24 native stands collected from different parts of the country and two populations with foreign origin imported were carried out. The results showed that the average seed germination percentage of the stands before treatment was 56.7% (the lowest rate was 20% in curled leaf Parsley stand and the highest was 78% in Jiroft 1 stand). Also, the hydropriming treatment had a significant effect at the level of 1% on the emergence of parsley seeds, and its greatest effect was in 24 hours. Also, the highest effect of treatment on Arak, Garmsar and Pich of Tehran was 21.8, 20.9 and 20%, respectively. The least effect of hydropriming was on the population of curled leaf parsley (7.4%). Totally, it was concluded that hydropriming can increase the germination percentage and quality of parsley seeds.
mohammad mohammadi; Reza Tavakkol Afshari; Jafar Nabati; Ehsan Oskoueian
Abstract
Identification of primings that induce secondary metabolites in order to withstand cold stress can be effective in the establishment and yield of crops. This experiment was conducted in the laboratory conditions as a completely randomized design with three replications to evaluate the effect of seed ...
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Identification of primings that induce secondary metabolites in order to withstand cold stress can be effective in the establishment and yield of crops. This experiment was conducted in the laboratory conditions as a completely randomized design with three replications to evaluate the effect of seed priming on cold tolerace of three genotypes and one cultivar of chickpea during germination stage in 2020. Treatments include temperatures of 5, 10, 15 and 20 ° C, genotypes of MCC505, ILC8617, MCC495 and Saral cultivar and primings included control (non-primed), hydropriming, sodium chloride, acid salicylic, sodium nitroprusside, phosphorus and potassium soluble bacteria, Full spectrum of 20 essential amino acids, potassium nitrate, zinc sulfate. Results indicated that the treatments of sodium nitroprusside, hydropriming, acid salicylic and zinc sulfate prevented the germination activity from stopping due to the decrease in temperature and among them, sodium nitroprusside treatment was able to improve germination percentage, germination rate, hydrogen peroxide and catalase under 5 ° C compared to the control by 5.7, 19, 4 and 15%, respectively. In addition, the above treatmens under 20 ° C resulted in 2 and 4.7% improvement in alpha-amylase and hydrogen peroxide, respectively. Generally, the effect of priming on cold tolerance at the germination stage showed that cold stress reduces seed germination and germination rate and has a negative effect on germination indices, enzymatic and biochemical activity. However, the use of primings, especially sodium nitroprusside, moderated the effect of cold stress and improved seed characteristics under cold stress.
Hassan Feizi; Elham Javedanipoor
Abstract
In order to investigate Spermidine and γ-Aminobutyric Acid (Gaba) role on germination features and growth parameters of cucumber under salinity stress, an experiment was conducted as factorial layout based on the completely randomized design at university of Torbat Heydarieh, Iran in 2108 . The ...
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In order to investigate Spermidine and γ-Aminobutyric Acid (Gaba) role on germination features and growth parameters of cucumber under salinity stress, an experiment was conducted as factorial layout based on the completely randomized design at university of Torbat Heydarieh, Iran in 2108 . The first factor consists of seed priming with Gaba (5 and 10 mM), Spermidine (5 and 10 mM), the combination of them and hydropriming in distilled water, and no treatment. The second factor was three salinity levels (0, 1.8, 9.5 dS/m). Results showed that seed priming with Gaba and Spermidine positively affected the shoot and seedling fresh weight, root length, and root dry weight. The highest value of germination percent, relative germination, and germination index was seen in no salinity and 5 mM Spermidine and 10 mm Gaba application (by 19 percent more than control). Using hydropriming, Spermidine and Gaba significantly improved cucumber seedling growth under 9.5 dS/m salinity in comparison to zero salinity treatment. Salinity caused a reduction of germination percent from 84 to 17 %, but employing seed priming treatments caused an enhancement of relative germination in salinity condition. In other words employment of hydropriming and these amendments induced in the alleviation of salinity stress. In attention to application of hydropriming as an inexpensive and convenient method in comparison to other treatments it could be recommended.
F. Sharifzadeh; Arezoo Espanany; Mohammad Reza Naghavi
Abstract
In this research, the effect of different seed priming treatments was investigated on seed germination parameters of Securigera securidaca seeds in the low temperature stress conditions. Seeds first were exposed to eight temperature levels (5, 10, 15, 20, 25, 30, 35 and 40 ° C). Experimental treatments ...
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In this research, the effect of different seed priming treatments was investigated on seed germination parameters of Securigera securidaca seeds in the low temperature stress conditions. Seeds first were exposed to eight temperature levels (5, 10, 15, 20, 25, 30, 35 and 40 ° C). Experimental treatments included different priming treatments (hydropriming, osmopriming including potassium nitrate and calcium chloride and no priming). The results showed that temperature significantly reduced germination percentage and rate, seedling length and seedling dry weight, normal seedling percentage and seed vigor. 5 mM of calcium chloride treatment at 10 ° C for 20 hours had the highest germination percentage, and 1% of potassium nitrate treatment at 10 ° C for 20 hours had the maximum seedling dry weight and 0.5% of potassium nitrate at 10 ° C for 20 hours and 10 mM of calcium chloride treatments at 15 ° C for 20 hours had the highest percentage of normal seedlings. Hydropriming treatment at 15 ° C for 20 hours had the highest germination rate, seedling length and seed vigor and was also one of the best treatments in terms of normal seedling percentage. So this treatment can be introduced as a suitable treatment for this plant because it is better in most germination traits and it is easier and cheaper to do.
S. Mojarab; M. Moghadam; E. Saeedi Pooya; R. Narimani
Abstract
With attention to the native landscape design value and the using of grasses which play a crucial role in the urban landscape, we carried out two experiments in germinator condition. This investigation was conducted to explore effects of hydro and osmopriming on germination and seedling growth of Lolium ...
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With attention to the native landscape design value and the using of grasses which play a crucial role in the urban landscape, we carried out two experiments in germinator condition. This investigation was conducted to explore effects of hydro and osmopriming on germination and seedling growth of Lolium rigidum. The first experiment was carried out as completely randomized design with 4 treatments and replications. The treatments include: dry seed (control) and seed soaking in distilled water in three times 12, 24 and 48 hours, respectively. The second factorial experiment was carried out as completely randomized design with four replications. First factors included three levels of priming (seeds treated with distilled water, seeds treated with KNo3 0.2% and NaCl 45 dS/m), the second factor included three levels of time (12, 24 and 48 hours). In this research some seed germination indices such as germination percentage, germination speed, length of root and shoot, fresh and dry weight of root and shoot, mean germination time and vigor index were measured. The results of the first experiment showed that the effect of seed priming with distilled water was significant (P<0.01) than control at all times on most traits. The results of the second experiment showed that osmopriming especially KNo3 for 12 hours improved the rate and percentage of germination and growth of the seedling. Totally, osmopriming had more significant effect than control and hydropriming.
Volume 3, Issue 1 , March 2014, , Pages 97-107
Abstract
In order to evaluate the effect of different seed priming treatments on germination parameters improvement in Pisumsativum L.a factorial experiment was conducted in completely randomized design with four replications in seed science and technology laboratory of agriculture faculty, Shahrekord University ...
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In order to evaluate the effect of different seed priming treatments on germination parameters improvement in Pisumsativum L.a factorial experiment was conducted in completely randomized design with four replications in seed science and technology laboratory of agriculture faculty, Shahrekord University in 2013. The experimental factors were consisted as priming types (osmopriming, halopriming and hydropriming) and priming times (12, 24 and 36 hours). Results showedthat different priming treatments had significant effect on radicle length, shoot length, shoot dry weight, radicle dry weight, germination percentage, germination rate, relative germination, vigor indexesIn addition to,priming times had significant effect in all measured traits except germination rate Themaximum radicle length, germination percentage, relative germination and vigor index I achieved with concentration of 1.1 MPa PEG and 24 hours. The maximum shoot length and germination rate obtained with distilled water treatment, 24 hours and concentration of 0.7 MPa PEG, 24 hours, respectively. The lowest amount of all measured traits was observed in concentration 1.2 MPa KNO3 with 36 hours. In conclusion, the high doses of PEGwith 24 hoursis suitable for germination improvement of pea seeds.
