Davoud Kartoolinejad; Derakhshan Rahimi; Kazem Nourmohammadi; Reza Naghdi
Abstract
Current research aimed to evaluate the effect of nano priming using multi-walled carbon nanotubes on drought tolerance of Caucasian alder. This study was employed a factorial experiment in a completely randomized design with four replications. Drought stress was applied in the laboratory, using a solution ...
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Current research aimed to evaluate the effect of nano priming using multi-walled carbon nanotubes on drought tolerance of Caucasian alder. This study was employed a factorial experiment in a completely randomized design with four replications. Drought stress was applied in the laboratory, using a solution of polyethylene glycol 6000 at 0, -2, -4, -6, and -8 bar on the primed seeds with concentrations of 0, 10, 30, 50 and 100 mg l-1 of carbon nanotubes. The results showed significant effect of nano priming and drought stress on germination factors such as germination rate and percentage, root fresh weight, shoot fresh weight and root to shoot fresh weight at the probability of 99%. The highest germination rate and percentage at all levels of drought stress, was related to100 mg l-1 of nano carbon treatment. The highest fresh weight of root and shoot at all levels of drought stress was related to 30 mg l-1 of nano carbon treatment. According to the results of this experiment it could be concluded that nano-priming improve seed germination characteristics of alder tree under drought stress.
marzeyh Rezai; Naeges Palashi; Farzin Abdolahi; Hamid Moslemi
Abstract
Moringa peregrina) Forssk( Fiori Is one of the valuable forest species of tropical regions which has been endangered for many years due to its special vegetative characteristics as well as improper seed harvesting and regeneration. Investigation of the effect of some pre-treatments on seed germination ...
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Moringa peregrina) Forssk( Fiori Is one of the valuable forest species of tropical regions which has been endangered for many years due to its special vegetative characteristics as well as improper seed harvesting and regeneration. Investigation of the effect of some pre-treatments on seed germination seems to be necessary to increase germination rate and its growth and development. This study was down with factoriel by random total project and three repite in Bashagerd Hormozgan with this goal: investigating of priming affective on seed germination characteristic. Experiment threatment are giberlic acid (0,200,400,600 ppm) and kno3 (0,1,2,3%) for 24 houres. Data varianse Analysis results show that giberlicacid has affect on germination percentage index, weight index, germination daily mean, germination value in level 5% and it hasn’t affect on germination speade, hight index and aliving percentage. In addition to both giberlic acid and kNo3 has affect on germination mean max and germination time mean in 5% level. Finaly we found that giberlic acid with 200 ppm and KNo3 concentration had the most affect on seed germination Moringa prigrina and cause to increase more than twoice growth.
Mahmood Abadeh; Malihe Sadeghi Bahmani; hamed hasanzadeh khankahdani; Maryam yektankhodaei
Abstract
This experiment was conducted as a factorial based on a completely randomized design with four replications and the first factor was Culture medium with two levels: laboratory and Greenhouse, and the second factor was seed pre-treatment with five levels: Control, Leaching for 12 hours, Leaching for 12 ...
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This experiment was conducted as a factorial based on a completely randomized design with four replications and the first factor was Culture medium with two levels: laboratory and Greenhouse, and the second factor was seed pre-treatment with five levels: Control, Leaching for 12 hours, Leaching for 12 hours and Soaking in gibberellic acid for 12 hours, Scarification with sandpaper and Scarification with sandpaper and Soaking in gibberellic acid for 12 hours. The results showed that in Greenhouse vegetative traits of plumule length (78.6 mm), radicle length (109.34 mm), seedling dry weight (102.7 mg), allometric coefficient (0.72) and seedling vigour (95) were higher than the laboratory (p<0.05). The results also showed that leaching and soaking in gibberellic acid pre-treatment increased indices and traits germination rate (5.56), mean daily germination (1.9), peak value (2.48), germination value (6.1), plumule length (61.9 mm), radicle length (86.1 mm), seedling dry weight (82.2 mg) and seedling vigour (94.3) (p<0.05). This pre-treatment also reduced day to beginning germination index (5.6) (p<0.05). The results of mean comparison of the interaction effect of Culture medium and Pre-treatment showed that in Greenhouse leaching and soaking in gibberellic acid pre-treatment reduced day to beginning germination index (4.2) and increased vegetative traits of plumule length (93 mm), radicle length (129.2mm), seedling dry weight (120.8 mg) and seedling vigour (124.9) (p<0.05).
Esmaeil Ebrahimi; Seyed Amir Moosavi; seyed ata Siadat; Nooralah Moallemi; Mohammad Sabaeian
Abstract
Seed germination is one of the most important and basic stages of plant growth and development so it has great importance and effect on other stages of its growth. Cassia is a plant from the legume family and has many medicinal properties. Cassia propagation is done by seeds, but no study and report ...
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Seed germination is one of the most important and basic stages of plant growth and development so it has great importance and effect on other stages of its growth. Cassia is a plant from the legume family and has many medicinal properties. Cassia propagation is done by seeds, but no study and report on the tolerance of these seeds to salinity stress in the country have been presented yet. Two factorial experiments were performed in a completely randomized design at the Seed Technology Laboratory of Agricultural Sciences and Natural Resources University of Khuzestan. In the first experiment, the effect of hormone priming treatment with gibberellin, halopriming with potassium nitrate, and hydro priming on Cassia seed germination was investigated. The results of this experiment showed that the highest seed vigor was obtained in the treatment of 50 mg/l gibberellin for 12 hours of priming. After selecting the best treatment (gibberellin 50 mg/l for 12 hours), germination characteristics of primed seeds compared with no primed seeds under salinity stress (0, 4, 8, 14, 16, and 20 dS/m). The results showed that seed tolerance to salinity stress at the germination stage increased significantly with seed priming. The highest seed vigor was observed in priming treatment at no salinity stress condition (339.89) while the lowest seed vigor of primed treatment was observed in 20 dS/m. Unprimed seeds could not withstand salinity stress beyond 4 dS/m.
Mohammad Reza Pahlevani; Mohammadali Alizadeh; Mohammad Nabi Ilkaee; Ali Ashraf Jafari; Seyed Esmaiel Seyedian
Abstract
Yarrow (Achillea) is one of the most important species of medicinal plants that has many applications in the pharmaceutical, cosmetic and health industries. In order to investigate the effect of seed priming on the germination characteristics of degenerate seeds,, A factorial As the form of completely ...
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Yarrow (Achillea) is one of the most important species of medicinal plants that has many applications in the pharmaceutical, cosmetic and health industries. In order to investigate the effect of seed priming on the germination characteristics of degenerate seeds,, A factorial As the form of completely randomized design with 3 replications carried in the greenhouse of the Natural Resources Gene Bank of Research Institute Forests and Rangeland in 2022.. I, three yarrow species, Achillea.nobolis, A.millifolium and A.tenufolia, were artificially senesced by applying a temperature of 40 degrees Celsius and a relative humidity of 100% (for 0, 48 hours, 72 hours), seed priming at 3 levels, including hydropriming (soaking for 24 hours in distilled water), gibberellic acid, 250 and 500 ppm. The analysis of variance showed that there were main and interaction effects of species, seed priming and seed deterioration for all the traits of emergence Characteristics were significant at P≤ 1% . Comparison of the species showed , that of A. nobolis species higher values of all traits except for dry matter compare with two other species.The species of A. millifolium was ranked as second level. The highest emergence rate was obtained in non- deteriorated (hydro) seeds. Three species have high average mean values with gibberellic acid 250 ppm for all traits except the ratio of root/stem and percentage of dry matter. . The highest root length /Shoot were obtained with gibberellic acid 250 ppm, which indicates that the aged seeds inside Pots have more rooting improvement for their survival
Azam Khaleghi; Alireza Dadkhah; Reza Rezvani
Abstract
This research was conducted in order to investigate the effect of aqueous extract of different organs of Artemisia aucheri on the growth and germination traits of Brassica napus and Goldbachia laevigata in two separate experiments including the laboratory and the greenhouse conditions, respectively. ...
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This research was conducted in order to investigate the effect of aqueous extract of different organs of Artemisia aucheri on the growth and germination traits of Brassica napus and Goldbachia laevigata in two separate experiments including the laboratory and the greenhouse conditions, respectively. The experiments were exerted based on a completely randomized design with three replications and randomized complete block design with four replications, respectively. The test treatments included aqueous extracts of Artemisia in concentrations of 5, 10 and 15% of roots, 5, 10 and 15% of aerial organs and control (distilled water). The results showed that with increasing extract concentration, the germination and growth traits and total chlorophyll of both investigated plants significantly decreased. In such a way that the highest and lowest inhibition rates were associated with 15% root extract and 5% aerial organs extract, respectively. The level of 15% Artemisia root extract in Brassica decreased the germination percentage by 37.1% and in Goldbachia by 48.5% compared to the control. Increasing of extract concentration from zero to 15% of arial parts decreased stem length decreased by 30.3% in Brassica and 56.3% in Goldbachia compared to the control. Most of the examined traits in Goldbachia weed, were more sensitive to the allelopathic effects of Artemisia extract compared to Brassica. in general, root extract of Artemisia were more capable of dealing with germination and seedling growth than the aerial organs. Therefore, 15% aqueous extract of Artemisia root can be suggested to reduce the growth and weakening of the weed Goldbachia.
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.
Volume 1, Issue 1 , March 2012, , Pages 19-27
Abstract
Among the production factors, seed as the primary production factor plays an important role in the transfer and exploitation of genetic characteristics seeds aiming to increase qualitative and quantities of the yield. Among growth stages of plants, seed germination and emergence stages are the most critical ...
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Among the production factors, seed as the primary production factor plays an important role in the transfer and exploitation of genetic characteristics seeds aiming to increase qualitative and quantities of the yield. Among growth stages of plants, seed germination and emergence stages are the most critical growth stages and play a pivotal role in plant establishment in fields. In order to investigate the impacts of seed diameter size on characteristics of germination in three wheat )Triticum aestivum L.( cultivars, this study was conducted in 2008 in a research station of seed and plant certification and registration research institute, Karaj, Iran. The experimental factors were five seed diameters ) 2-2.2, 2.2-2.5, 2.5-2.8, 2.8-3 ,andgt;3 mm ( and three wheat cultivars )Mahdavi, Pishtaz and Bahar(. In laboratory, seeds from different size class from cultivars were planted in a completely randomized design with 3 replicates. Germination percentage, germination speed , seedling-length, radicle-length, plumule-length, seedling dry weights, radicle dry weights and plumule dry weights were measured. Data analysis showed that seed size had a significant impact on speed of germinations, radicle dry weights, plumule dry weights and seedling dry weights. Results indicated that germination speed significantly decrease with increasing seed size. The other traits showed significant increases with increasing seed size. Cultivar had significant impact on germination characteristics but germination percentage and germination speed were similar between cultivars. Mahdavi cultivarandrsquo;s seedling length and dry weight was dependent on 1000 number of seed weights, especially influenced by 2.5-2.8, 2.8-3 and andgt;3 mm seed diameter, Seed size may be equivalent to the amount of nutrients saved in seeds. Therefore larger seeds may produce vigorous seedlings. Significant interaction was observed for radicle-length, plumule-length and seedling dry weight. This study suggested that the wheat genotypes did not have similar performance regarding to the variation in seed sizes .
Sajad Alipour; Ali Tehranifar; Mahmoud Shoor; Leila Samiei; Homayoun Farahmand
Abstract
Fritillaria raddeana Regel is one of the Iranian-native bulbous plants well known for its medicinal and ornamental values. As regards germination and establishment are two key points in order to protect the natural populations of this species, it is important to study about propagation and domestication ...
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Fritillaria raddeana Regel is one of the Iranian-native bulbous plants well known for its medicinal and ornamental values. As regards germination and establishment are two key points in order to protect the natural populations of this species, it is important to study about propagation and domestication of F.raddeana. An experiment was conducted to study the status of seed dormancy to break it in a randomized completely design including 5 priming treatment with 7 replicate in 2015- 2016. Priming treatments were arginine; in concentrations of 5 and 10 mM), gibberellic acid; concentration of 250 and 500 mg per liter, and control (without priming). All events throughout germination process seed was recorded graphically for an image. The results showed that seed priming with arginine and gibberellic acid improved germination properties. Among all treatments, arginine 5 mM has greatest impact on the rate and percentage of germination as far as it increased percentage and rate germination by 1.5 and 2.5 fold in companion with control, respectively. However, there is no significant different between arginine 10 mM and two concentration of gibberellic acid in germination results. The study on the growth of the embryo showed that F.raddeana seeds have after-ripening, so that embryo size is third of its actual size in natural habitat that gradually developed with receiving cold treatment.
Tayyebeh Saadat; Mohammad Sedghi; Abdolghayyoum Gholipouri; Raouf Seyed Sharifi; Roghayyeh Sheikhbaglou
Abstract
To examine the effect of priming and deterioration on the activity of antioxidant enzymes, mobility of seed reserves in French bean, a factorial experiment was performed in a completely randomized design with three replications. Treatments included deterioration (control without deterioration, 88% and ...
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To examine the effect of priming and deterioration on the activity of antioxidant enzymes, mobility of seed reserves in French bean, a factorial experiment was performed in a completely randomized design with three replications. Treatments included deterioration (control without deterioration, 88% and 78% of germination of control) and priming (control, hydro-priming, priming by gibberellin and salicylic acid). The results showed that deterioration reduced germination percentage. Priming reduced the effect of deterioration and improved germination percentage. By increasing deterioration, seed reserves use efficiency (SRUE), seed reserves remobilization efficiency (SRRE) and fraction of used seed reserves (FUSR) were reduced, but respiration index (SR) and residual seed dry weight (RSDW) were increased. SRUE reduction was about 30% compared to the control treatment of deterioration and seed respiration index in gibberellin pre-treatment was higher about 24% compared to the control treatment without priming. The total seed protein content in gibberellin pretreatment and without deterioration was increased about 32 percent. The peroxidase activity in gibberellin treatment and deterioration 88% compared to the control showed an increase about 57%. The most superoxide dismutase activity (SOD, 175.2 unit mg-1 protein) was observed in priming with salicylic acid and deterioration 88%. The maximum amount of malondialdehyde (MDA, 1.46 mmol g-1 FW) was related to the treatment with no priming and deterioration 78%. In general, using gibberellin pretreatment strengthened weak bean seeds physiologically and the treatment can be used to increase weak seed vigor.
Ali Hoseinipoor; Alireza Yadavi; Hamidreza Balouchi; َAli Moradi
Abstract
Germination is one of the most sensitive stages of plant life, which is affected by various environmental factors such as temperature and humidity. Because seed standard germination test alone cannot accurately describe seedling emergence in field conditions, seed strain tests such as accelerated aging ...
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Germination is one of the most sensitive stages of plant life, which is affected by various environmental factors such as temperature and humidity. Because seed standard germination test alone cannot accurately describe seedling emergence in field conditions, seed strain tests such as accelerated aging test (seed deterioration) are used. In this research, germination and biochemical indices of linseed (Linum usitatissimum Var. Norman) in moisture potential of 0, -0.2, -0.4, -0.6, -0.8, -1.2 and -1.2 MPa under accelerated aging conditions at temperatures 10, 15, 20, 25, 30 and 35°c were evaluated. The results showed that the percentage and rate of germination and seedling vigor index in accelerated aging and non-accelerated aging respectively were increased by increasing temperature up to 20 and 25 ° C, , then decreasing to 35 ° C. And with decreasing potential water, in terms of accelerated aging, showed its lowest level at any temperature. The amount of soluble protein, catalase activity and proline content of seeds increased with decreasing water potential and accelerated aging effects at each temperature. Also, with increasing temperature, protein content and catalase enzyme activity of Linum usitatissimum seed are increased; proline content of the seed decreased.The results of this study showed that Linum usitatissimumis resistant to high and low temperatures in the early stages of germination under favorable temperature conditions of plants resistant to dehydration and under stress-free conditions.
mohammad behzad amiri; Parviz Rezvani Moghaddam; Mohsen Jahan
Abstract
An experiment based on CRD design with three replications was conducted in 2014 year, in Ferdowsi University of Mashhad, Iran. The experimental treatments included 7 types of eco-friendly inputs: Humic acid, Fulvic acid, Nitroxin (contains Azotobacter spp. And Azospirillum spp. Bacterias), Biophosphorous ...
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An experiment based on CRD design with three replications was conducted in 2014 year, in Ferdowsi University of Mashhad, Iran. The experimental treatments included 7 types of eco-friendly inputs: Humic acid, Fulvic acid, Nitroxin (contains Azotobacter spp. And Azospirillum spp. Bacterias), Biophosphorous (contains Bacillus sp. And Pseudomonas sp. bacterias), Biosulfur (contains Thiobacillus spp. Bacteria), Glomus mosseae, Glomus intraradices, and control. The results showed that organic acids of humic and fulvic increased germination percentage 25 and 20% and germination rate 58 and 33% compared to control, respectively. Germination percentage was 20, 25, and 24% more in biofertilizers of nitroxin, biophosphorous and biosulfur compared to control, respectively and germination rate under application of this fertilizers added 59, 24, and 50% compared to control, respectively. Humic acid, fulvic acid, nitroxin, biophosphorous, biosulfur, Glomus mosseae and Glomus intraradices reduced mean germination time 33, 35, 38, 19, 36, 36, and 16% compared to control, respectively. The highest radicle and plumule length obtained in treatment of humic acid and the highest radicle to plumule length observed in treatment of biosulfur. Fulvic acid increased radicle and plumule dry weight 51 and 38% compared to control, respectively. The highest and the lowest radicle to plumule dry weight obtained in treatments of Glomus intraradices (0.199) and control (0.124), respectively.
Mahrokh Bolandi; Parisa Sheikhzadeh; Saeed Khomari; Nasser Zare; Jaber Sharifi
Abstract
To investigate the effect of the maternal plant's growth environment on qualitative characteristics and germination of borage seeds after storage, an experiment was carried out in a randomized complete block design with three replications at the University of Mohaghegh Ardabili. The treatments included ...
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To investigate the effect of the maternal plant's growth environment on qualitative characteristics and germination of borage seeds after storage, an experiment was carried out in a randomized complete block design with three replications at the University of Mohaghegh Ardabili. The treatments included seeds resulting from maternal plants sprayed with humic acid (0.5 g L-1), chitosan (1 g L-1), and the combination of humic acid and chitosan (0.5 g L-1 + 1 g L-1), salicylic acid. (4 mM), ascorbic acid (0.85 mM), potassium nitrate (20 mM) and control.The results showed that under non-storage conditions, the seeds that resulted from the maternal plants treated with bio-stimulants and growth regulators exhibited higher seed germination and seedling growth than those from the control plants. In this condition, foliar application of the maternal plants with humic acid+chitosan had the highest effect on the seed germination and seedling growth characteristics by increasing the germination percentage and rate, vigor index, seedlings dry weight and length. Although five years of dry seed storage reduced the seed viability and vigor, foliar application of maternal plants reduced the negative effects of storage on germination and enhanced the seed germination percentage and seedlings length, and dry weight by increasing the seed viability and seed vigor index. In general, among the foliar spraying treatments of the maternal plants, the combined foliar application of humic acid+chitosan, maybe due to the synergistic effects, can be considered the best treatment to improve the borage seed longevity, germination characteristics, and seedling growth.
Ali Ebadi; Fatemeh Ahmadnia; ghasem parmoon
Abstract
In order to study the effect of different levels of drought stress and temperature on seed germination of buckwheat, a factorial experiment was conducted as completely randomized design with three replications. Experimental treatments were included different levels of drought stress (0, -0.2, -0.4, -0.6 ...
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In order to study the effect of different levels of drought stress and temperature on seed germination of buckwheat, a factorial experiment was conducted as completely randomized design with three replications. Experimental treatments were included different levels of drought stress (0, -0.2, -0.4, -0.6 and -0.8 MPa) and different temperatures (8, 12, 16, 20, 25, 30, 35 and 40 oC). Results indicated that all models of thermal time, hydro time, and hydrothermal time could predict the germination of buckwheat in temperature and osmotic potential. Basic temperature (Tb) was estimated from -0.98 to 11 oC, optimum temperature (To) from 21.7 to 24.7 oC, and maximum temperature (Tc) from 30 to 41.5 oC, which osmotic potential increased Tb and decrease To and Tc in Buckwheat. Also, increasing temperature enhanced germination rate (decrease θHT from 18 MPa day at 8 oC to 3 MPa day at 35 oC), and decreased stress tolerance due to increasing basic potential (increase ψ50 from -0.927 MPa to 0.043 MPa). According to the hydrothermal time model output, Tb in this plant was about 1.93 oC and at 92 MPa oC day, highest germination rate was recorded and ψTb in this plant in Tb was about -1.31 MPa. Also it was defined that, each of these three models predicted buckwheat seed germination under different temperature and water potential, but hydrothermal time was a general model and we can suggested it.
Saeed Saeedipour
Abstract
This experiment was conducted in order to evaluate the effects of osmo-priming on the characteristics of germination, seedling and some physiological characteristics of two cultivars of rapeseed (Brassica napus L.) under saline conditions. The seeds of two spring rape varieties were pretreated with 29.5 ...
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This experiment was conducted in order to evaluate the effects of osmo-priming on the characteristics of germination, seedling and some physiological characteristics of two cultivars of rapeseed (Brassica napus L.) under saline conditions. The seeds of two spring rape varieties were pretreated with 29.5 mM potassium nitrate (KNO3) for 12 hours at 30 degrees Celsius. In the first experiment after priming, 25 primed and unprimed seeds were placed in petri dishes with 4 levels of salinity (0, 50, 100 and 150 mM of NaCl) in a completely randomized design in four replications. The results showed that the germination percentage of primed seeds was higher than non-primed seeds.In the second experiment, 20 primed and unprimed seeds were planted in pots filled with perlite and peat at a ratio of 3:1. The pots were kept for three weeks in the greenhouse with a temperature of 26/16 degrees Celsius . The pots were watered every day with saline solutions (0, 50, 100 and 150 mM of NaCl). The results of multi-way interaction also showed that, primed seeds had higher antioxidant enzyme activity and higher content of soluble sugars and proline, at the same time, cell membrane damage in them was lower due to lower concentration of malondialdehyde compared to non-primed seeds. Under salinity conditions of 150 mM, the highest dry weight, antioxidant activity, and accumulation of soluble sugars and lower concentration of malondialdehyde were observed in Hyola 401 variety. This research showed that priming with KNO3 improves canola seed germination under stress conditions.
Volume 4, Issue 2 , December 2015, , Pages 27-40
Abstract
In order to study the yield and size distribution of potato seed tubers under different methods of phosphorus (P) nutrition, a factorial experiment based on RCBD (Randomized Complete Block Design) with four replications was conducted in the spring 1391. Treatments included the amount of P fertilizer, ...
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In order to study the yield and size distribution of potato seed tubers under different methods of phosphorus (P) nutrition, a factorial experiment based on RCBD (Randomized Complete Block Design) with four replications was conducted in the spring 1391. Treatments included the amount of P fertilizer, source of P fertilizer and time of P application. Variables such as yield and its components, phonological, morphological and physiological traits were evaluated in potato plants. Results showed that strip application of P at planting stage caused an increase in Leaf Area Index (LAI). Petiole P concentration in potato plants was affected significantly by the interaction of source×amount×application time. The highest level of leaf nitrogen was shown in planting time use of en masse DAP. The minimum level of P fertilizer (37 kg/h net P) caused tuber number to significantly increase from 64.25 to 92.29. Seed tuber number (28-65) and seed tuber size in DAP treatment were significantly higher than two other fertilizer treatments. No-application (Control) treatment resulted in the lowest seed tuber in size and number.
sholeh bahrami; Mehdi Tajbakhsh; Esmaeil Rezaei-chiyaneh
Abstract
In order to evaluate germination characteristics and shelf life of alfalfa seeds stored in different storage conditions, a factorial experiment was conducted in a completely randomized design in a graduate laboratory of Urmia University of Agriculture. The experiments included relative humidity in six ...
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In order to evaluate germination characteristics and shelf life of alfalfa seeds stored in different storage conditions, a factorial experiment was conducted in a completely randomized design in a graduate laboratory of Urmia University of Agriculture. The experiments included relative humidity in six levels (50, 60, 70, 80 and 90 %) and control (room humidity) and storage duration (0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 months) with three replications. The studied traits included germination indices, seedling growth indices, and seed vigor and storage capability of seeds. The results showed that all germination indices were affected by relative humidity and storage duration. The interaction between moisture and storage duration was significant except for germination uniformity on all indices. The highest germination percentage was obtained in the control conditions (96.9 %), which reached 79.4 after 10 months of storage. Increasing the moisture content of the storage caused a significant decrease in the coefficient and uniformity of germination. The germination rate was the highest in the first month with the average of 0.071 per day, which had the lowest in 90 % relative humidity in the 10 months after storage to the average of 0.018 germs per day.
Volume 2, Issue 2 , December 2013, , Pages 135-146
Abstract
In order to study the effects of osmopriming on the germination of silage corn seeds (K.SC 704), a factorial experiment in a randomized completely block design with three replications was carried out in Qaemshahr faculty of agricultures lab in 2009. Factors included PEG with the density of 5 and 10%, ...
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In order to study the effects of osmopriming on the germination of silage corn seeds (K.SC 704), a factorial experiment in a randomized completely block design with three replications was carried out in Qaemshahr faculty of agricultures lab in 2009. Factors included PEG with the density of 5 and 10%, KNO3 with the density of 1 and 2% and KCl 2 and 4% in the periods of 8, 16 and 24 hours. Primary root and length (mm), germination rate (Seed/day number), primary root and shoot tresh weight (gr), primary t root dry (gr) weight, primary root/ primary shoot length proportion (R/S), primary root/ primary shoot tresh weight proportion (R/S), primary root/ primary shoot dry weight proportion (R/S) and normal seedlings number were measured. The results indicated that the maximum length of root is obtained (R/S) under factors of time and priming PEG with the density of 5% and time of 16 hours, but the highest amount of length of roots and stems and wet weight (R/S) with prime by PEG and KNO3 with the density of 5 and 2% in the period of 24 hours was recorded. The highest rate of germination and wet weight of root with priming PEG and KNO3 was obtained with the density of 5 and 2%.
Volume 3, Issue 2 , December 2014, , Pages 153-161
Abstract
In order to survey the effects of dormancy-breaking methods on Kelussia odoratissmaseeds a completely randomized design was implemented at five replications in Research Institute of Forest and Rangelands, 2010. Treatments were: seed stratification (4°C for 4, 6, 8 and 10 weeks), socking in gibberllic ...
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In order to survey the effects of dormancy-breaking methods on Kelussia odoratissmaseeds a completely randomized design was implemented at five replications in Research Institute of Forest and Rangelands, 2010. Treatments were: seed stratification (4°C for 4, 6, 8 and 10 weeks), socking in gibberllic acid (250, 500 and 1000 ppm solutionfor 12 hr) and seed stratification and gibberllic acid combination (500 ppm +4°C for 4,6,8 and 10 weeks). Results showed significant differences among treatments (pKelussia odoratissma α-amylase activity obtained of 500 ppm +4°C for 8 and 10weeks (14.2 and 13.8 nm seed-1 min-2). Results indicated Kelussia odoratissma seed treatment with 500 ppm +4°C for 8 and 10weeks was the best treatment for induction Kelussia odoratissma seed germination
Volume 1, Issue 2 , December 2012, , Pages 185-192
Abstract
In order to study on effect of Salicylic acid (SA) and Methyl Jasmonate on germination and seedling growth of canola Hyola401 cultivar, this research in laboratory and greenhouse were conducted based on completely randomized design (CRD) by four replications. Salicylic acid (SA) and Methyl Jasmonate ...
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In order to study on effect of Salicylic acid (SA) and Methyl Jasmonate on germination and seedling growth of canola Hyola401 cultivar, this research in laboratory and greenhouse were conducted based on completely randomized design (CRD) by four replications. Salicylic acid (SA) and Methyl Jasmonate concentration levels respectively were 0, 0.05, 0.1, 0.5, 1, 1.5 mM and 1, 3, 5, 10 and 12 andmicro;m and effects of those on germination percent, days number to 50% germination (G50), primary shoot and root length in laboratory and seedlings final emergence percent, days number to seedlings 50% emergence (E50), days number between seedlings 10 to 90% emergence (E10-90), seedlings chlorophyll content and remind seedlings number at end of experiment (seedling survival) were determined. Results showed that Salicylic acid (SA) and Methyl Jasmonate significantly improves germination percent, days number to 50% germination (G50), primary shoot and root lengthin canola seed compared with control. Also Salicylic acid (SA) and Methyl Jasmonate also increase chlorophyll content and seedling survival compared with control and among variousstudied Salicylic acid (SA) concentration levels 0.1 mM and 5 andmicro;m Methyl Jasmonate caused most improved germinatin characters.
Mahboobe Bahrami; Mohamad Rahim Owji; farhad mohajeri; Mahmood Dejam
Abstract
Salinity stress reduces seed quality, but suitable concentrations of silicon and nickel can improve germination indices in the produced seeds. This study was conducted in a factorial arrangement based on randomized complete block design (RCBD) in 2018 in Haji Abad city, Hormozgan, Iran. The experimental ...
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Salinity stress reduces seed quality, but suitable concentrations of silicon and nickel can improve germination indices in the produced seeds. This study was conducted in a factorial arrangement based on randomized complete block design (RCBD) in 2018 in Haji Abad city, Hormozgan, Iran. The experimental treatments consisted of four safflower varieties as the first factor, including Soffeh, Local Isfahan, Padideh, and Golmehr; and seven spraying levels, including nickel (100, 200 and 300 mg L-1) and silicon (100, 150, and 200 mg L-1) as the second factor. The results demonstrated that the foliar application of 100 mg/l Nickle and 200 mg/l silicon increased potassium by 10% and 18%, respectively. The foliar application of 200 mg/l silicon increased the activity of alpha and beta amylase enzymes by 17% and 12%, respectively. In addition, Golmehr and Safe varieties obtained from a mother plant recorded higher germination and rate percentage, as well as seed vigor, while Padideh variety showed the lowest values of the same traits. The foliar application of 200 mg/l silicon, compared to the control, increased the seed vigor as well as Soffeh and Golmehr cultivars by 23% and 25%, respectively; however, the Nickle concentration of 300 mg/l resulted in a decrease of 24% and 19% in these cultivars.On the other, this trait decreased with increasing nickel concentration significantly. Generally, foliar application of silicon at concentrations of 150 and 200 mg L-1 was found to improve seed quality of different safflower varieties under salinity stress.
Shabnam Rezaei; Barat Ghobadian; Mohammad-Taghi Ebadi; Hamidreza Ghomi
Abstract
In this research, the effect of cold plasma treatment on the germination characteristics of Camelina sativa, Kelussia odoratissima, and Heracleum persicum seeds were investigated. An experiment based on completely randomized design with in three replications was conducted. The treatments were three cold ...
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In this research, the effect of cold plasma treatment on the germination characteristics of Camelina sativa, Kelussia odoratissima, and Heracleum persicum seeds were investigated. An experiment based on completely randomized design with in three replications was conducted. The treatments were three cold plasma power of 40, 60 and 80 W applied on the seeds for 2 minutes and untreated sample was also evaluated as control treatment. The measured traits were: germination percentage and rate, plumule and radicle length. The results showed that cold plasma treatment had a significant effect on germination percentage, germination rate, and radicle length. The cold plasma at 80 kV and 2 minutes improved the germination percentage with increasing it by 10.6%, increasing germination rate by 2.35%, and 3.6 centimeters in radicle length in compared with the control sample. Based on the results obtained from K. odoratissima and H. persicum seeds, cold plasma couldn’t break the dormancy of these seeds, despite the improved hydrophilicity and disinfection of the seeds.
H.R. Eisvand; A. Sharafi
Volume 5, Issue 2 , January 2016, , Pages 23-35
Abstract
Various species of Satureja genus are growing in different regions of Iran. The drought stress is one of the most unfavorable factors for plant establishment and growth in main parts of the Iran. Germination and emergence of the most plants is affected by environmental stresses including drought and ...
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Various species of Satureja genus are growing in different regions of Iran. The drought stress is one of the most unfavorable factors for plant establishment and growth in main parts of the Iran. Germination and emergence of the most plants is affected by environmental stresses including drought and disturbed evnironments. One way to improve seeds and seedlings to cope with stress is seed priming. This research was conducted in order to study the effects of osmo and hydro priming at different temperatures on improving seed and seedling performance of Satureja khuzestanica Jamzad under drought stress conditions. A greenhouse research was carried out as a factorial experiment on the base of a randomized completely block design with three factors and four replications. The factors were including drought stress (50% and 25% of field capacity) with control (75% of FC), osmotic potential of priming (0, -4, -8 bar using PEG 6000) and priming temperatures (15 and 25 ºC). The percentage and rate of emergence, seedling fresh and dry weights, seedling height, vigor index, and leaf area decreased by increasing drought stress but the essential oil content and root length increased. The highest percentage of essential oil observed under 25% FC. Interaction of drought stress and osmotic potential of priming solution was significant on percentage and rate of emergence and vigor index. The interaction of priming temperatures and osmotic potential of priming was significant on the percentage and rate of emergence, vigor index, and shoot dry weight. Hydro-priming at 15 ºC had the most positive effect on the percentage and rate of emergence, fresh and dry weight of seedling, root length, plant height, leaf area, and vigor index. Overall, seed quality was better when priming temperature was lower (15 ºC).
M.Sh. Daneshmandi; R. Tavakkol Afshari; R. Sadrabadi Haghighi
Abstract
In this study the identification of chemical and biochemical characteristics of balangu seed oil (Lallemanthia royleana) and their parameters were investigated under accelerated aging conditions at 24 h, 48 h and 72 h at 41°C and 100% RH in a completely randomized design. The results showed that ...
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In this study the identification of chemical and biochemical characteristics of balangu seed oil (Lallemanthia royleana) and their parameters were investigated under accelerated aging conditions at 24 h, 48 h and 72 h at 41°C and 100% RH in a completely randomized design. The results showed that balangu seed oil content was 19.26%.Fatty acid profiles were 90.71% of unsaturated fatty acids (USFA) and 9.29% of saturated fatty acids (SFA), also the linolenic acid (C18:3), oleic acid (C18:1) and palmitic acid (C16:0) were important of PUSFA, MUSFA and SFA oil seeds, respectively.The antioxidants of oil seeds include 427.8 ppm tocopherols and 210 ml.l-1 of polyphenols. The results showed that 15.2% reduction in oil seed under accelerated aging treatment, also this treatments was the cause of increase of SFA compared to USFA. The oxidation and peroxide production peak was between control and 24 h of accelerated aging treatment. Oil resistance (rancimat) in the 72 h of aging treatment was 1.5 times less than to the control. The germination value (GV) was 1.6, 2.5 and 4.5 higher than the accelerated aging treatments, respectively. In general, it is likely that the changes of chemical and biochemical characteristics of seed oil is happened by oxidative enzymes and this condition is quicker in deteriorated balangu seeds
Volume 2, Issue 1 , March 2013, , Pages 25-38
Abstract
This study did with the aim of investigating osmopriming effect on phonological characteristics and some germination features in hybrid Maize (Zea mays L. CV. Single cross 704 and 640). This was carried out with a factorial experiment in randomized completely block design with tree on four replications, ...
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This study did with the aim of investigating osmopriming effect on phonological characteristics and some germination features in hybrid Maize (Zea mays L. CV. Single cross 704 and 640). This was carried out with a factorial experiment in randomized completely block design with tree on four replications, in seeds field and lab research which performed in Mazandaran naturon resources and cultivation, modification plants group, 2010-2011 mordad, respectively. Treatments included seed of two kind maize (640 and 704) and seven polyethilen glycol solution with 5 and 10 percent densities, potassium nitrat with 0.5 and 1 percent densities and choloride potassium with 1 and 2 densities, water and control (with out priming). Seedling emergence percent, Seedling emergence rate , Established seedlings, Day number sowing to rise coleoptiles, Day number sowing to stage 4 and 8 leaf, Day number to emergence tasel, Day number to the end of milk stage achieved, Germination percent, Germination rate, Normal seedlings number, Mean daily germination,Germination rate indx, Mean time to germination and Vigor 2 index.However, none of characteristics from statistican point under numbers in fluence showed meaningful difference, but results indicated that more percent and maize dermination rate achieved respectively with priming by polyethilen glycol solution with 5 and 10 percent densities. Which, most established seedlings to rise coleoptile, days number sowing to stage 4 and 8 leaf, days number to emergence tasel resulted with priming by control (with out priming) and their lowest was for polyethilen glycol with 5 and 10 percent respectively. Also, most of days number to the end of milk stage achieved with priming by potassium nitrate and choloride with 0.5 1 and 2 percent respectively. Most percend and germination rate for hydropriming and control (with out priming) and most normal seedling number and mean daily germination for water and control were obtained. Maximum of germination rate index and mean daily germination for control prime (with out priming) and minimum of mean germination time with priming by potassium nitrat and choloride with 0.5 and 4 percent obtained and also maximum of vigour 2 index for hydropriming and it ,s minimum was achieved for potassium nitrate and cholorid priming solution with0.5 and 4 percent resulted. Hence, both field and lab situations statistically were not under interaction effect on variety andtimes; priming and they havenandrsquo;t meaningful difference.
