Volume 2, Issue 1 , March 2013, , Pages 55-64
Abstract
In order to study effect of seed priming on seedling emergence and vigour of wheat cultivar ,experiment was conducted in laboratory seed and field ,in seed andamp; plant certification and registration Institute in 2009. Experimental design was a factorial based on completely randomized designs with four ...
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In order to study effect of seed priming on seedling emergence and vigour of wheat cultivar ,experiment was conducted in laboratory seed and field ,in seed andamp; plant certification and registration Institute in 2009. Experimental design was a factorial based on completely randomized designs with four replication. Two cultivars (Azar-2,Sardare-101)andtimes; four priming media and control (un soaked) were used in this experiment. Seeds were primed for 12 hour and 20 ċ in four priming media , PEG 10%, KCl 2%, KH2PO4 0/5%, distilled water and control. In pot experiment seedling emergence percent, seedling leugth, primary root and shoot leuth, and sedling dry weight, primary root and shoot dry weight and mean seedling emergence rate and time and in tield experimcut seedling emergence percent and mean rate and time detemined. Result vevealed . The interaction among seed priming media andtimes;cultivar showed the significant effects on stem length , root dry weight ,stem dry weight and total dry weight (andalpha;= %1), seedling length and Mean Emergence Rate (andalpha;=5%). All of the priming media caused that seeds emergence rapidly in compare with control. In compare among seed priming, Maximum root dry weight, stem dry weight and total dry weight was obtained for seeds osmoprimed with KCl 2%.The most percent emergence, mean emergence rate and seedling length was obtained for seeds osmoprimed with PEG 10%.In field condition hydro priming improved the rate of germination . In compare among seed priming, the most percent emergence in field was obtained in PEG 10%.The interaction among seed priming , seed priming media andtimes;cultivar showed the significant effects on percent emergence. The most was observed in sardari-101andtimes; KCl 2% and PEG 10%andtimes;Azar-2.
Ahmad Afkari
Abstract
In order to investigate the effects of priming with salicylic acid and salinity stress on improvement of germination characteristics, activity of antioxidant enzymes and and membrane lipid peroxidation of wheat cultivar Mihan, an experiment was conducted as factorial in a completely randomized design ...
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In order to investigate the effects of priming with salicylic acid and salinity stress on improvement of germination characteristics, activity of antioxidant enzymes and and membrane lipid peroxidation of wheat cultivar Mihan, an experiment was conducted as factorial in a completely randomized design with three replications in the physiology lab at the Islamic Azad University of Kaleiber Branch in 2018.The treatments consisted of different concentrations of acid salicylic in four levels (0, 0.5, 1 and 1.5 mM) and salt stress was inducted by NaCl solution (0, 50 100, 150 mM). The results analysis of variance showed that the effects of salinity and salicylic acid on germination indices and activity of antioxidant enzymes was significant.Results comparison of data showed that NaCl priming by salicylic acid increased the germination percentage, root growth, root, seedling dry weight and decreasing activity of antioxidant enzymes and seed protein content in the salty environment. Salicylic acid increased the level of cell division of seedlings and roots which caused an increase in plant growth. Enzymes activity assay showed that enzyme activity was increased under salt stress conditions and SA reduced activity of antioxidant enzyme by decreasing the salinity effects. In brief, the SA treatment reduced the damaging action of salinity on seedling growth and accelerated a restoration of growth processes. It seems that Salicylic acid as a plant growth regulator under salinity condition, activated plant tolerance mechanisms to salinity condition and decrease damaging effect of salinity on seed germination and seedling growth of wheat.
Volume 4, Issue 2 , December 2015, , Pages 57-69
Abstract
In order to understand the response mechanism of corn (Zea maize 704 single cross) seed germination and seedling growth to acid rain stress, this study in a randomized complete design with six treatments were performed and then examined by nineteen adjective related to seed germination and seedling growth. ...
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In order to understand the response mechanism of corn (Zea maize 704 single cross) seed germination and seedling growth to acid rain stress, this study in a randomized complete design with six treatments were performed and then examined by nineteen adjective related to seed germination and seedling growth. Simulated acid rain at pH2, 3, 4, 5, 6 and control (distilled water-pH7) and then examined by nineteen adjective related to seed germination and seedling growth. The results indicated water absorption in all treatments was lower than control except pH4. the germination percentage (GP), germination energy (GE) and seedling vigour index (SI) was not changed by acid rain higher at pH2. However, was stopped all germination characteristics in pH2 (PIncreased acidity with a decline in pH2 reached zeroSeedling growth was affected by acid rain so that the control showed better results than other treatments. According to the results, water reduction acidity and toxicity of acid rain can inhibit seed germination, development and establishment of the corn
H. Gholami; M. Parsa; M. Khajeh-Hosseini; H.R. Khazaie
Abstract
In order to determine the effects of the foliar applicationof ureaand micro elements during growth periods of maternal plants on germination, vigor and greening of produced chickpea seeds (Kabuli), an experiment was carried out in a randomized complete block design with 12 treatments and three replications ...
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In order to determine the effects of the foliar applicationof ureaand micro elements during growth periods of maternal plants on germination, vigor and greening of produced chickpea seeds (Kabuli), an experiment was carried out in a randomized complete block design with 12 treatments and three replications at the Agricultural Faculty Research Station, Ferdowsi university of Mashhad during 2013-2014. The treatments consisted of foliar applicationat six levels: control (foliar application with water); foliar applicationof urea (2 %); foliar applicationof urea + (2%) Zinc (2 per thousand); foliar applicationof urea (2%) + Iron sulfate (3 per thousand); foliar applicationof urea (2%) + Zinc (2 per thousand) and iron (3 per thousand); foliar applicationwith urea+ complete fertilizer (3 per thousand micro-elements containing 500 ppm) and foliar applicationwith two levels, sprayed once at the beginning of flowering and sprayed twice namely, one at the beginning of flowering and one at seeding stage that include 12 treatments in total. The result showed that foliar application was not significant on germination percentage and maximum speed of germination using two times foliar application of urea + Zinc+ iron and foliar applicationwith urea+ complete fertilizer in flowering and seeding time treatments, respectively. Two times offoliar application using urea + zinc + iron had the highest impact on the vigor index.
Roksana Nazari; soheil parsa; Reza Tavakkol Afshari; sohrab mahmodi
Abstract
In order to investigate the effect of priming on the improvement of physiological indices of antioxidant enzymes in soybean seeds, a factorial experiment was conducted in a completely randomized design with three replications at the Seed Science and Technology Laboratory of Tehran University in 2017. ...
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In order to investigate the effect of priming on the improvement of physiological indices of antioxidant enzymes in soybean seeds, a factorial experiment was conducted in a completely randomized design with three replications at the Seed Science and Technology Laboratory of Tehran University in 2017. The factors studied included two levels of deterioration (48 and 72 hours), three levels of salicylic acid (0, 300, 600 μM) and three times the salicylic acid application (before decay, post-fall, before and after deterioration). The traits measured included antioxidant enzymes (glutathione redactase, superoxide dismutase, catalase, peroxidase, ascorbate peroxidase, glutathione peroxidase, membrane peroxidation or malondialdehyde). The results showed that deterioration level increasing, decrease the antioxidant enzymes activity and increase membrane peroxidation and soybean seed priming with salicylic acid hormone restore the decayed seeds and increase the activity of antioxidant enzymes. The highest activity of ascorbate peroxidase activity was observed at 72 hours with the time of salicylic acid application before and after deterioration at a concentration of 300 μm and 6.98. Reduction of malondialdehyde leakage rate when combined with 300 μM concentration of salicylic acid Was observed at 1.45. The results also showed that the priming at the same time improves the chemical properties of the seeds in the deterioration.
Behzad Gholipor; Afshin Mozaffari; Abas Maleki; Mohammad Mirzaei Heydari; Farzad Babaii
Abstract
Experiments were carried out in a completely randomized design with 3 replication factorial arrangement. Experimental treatments were including genotype factor (including 15 sea beet samples from Khuzestan, Elam, Kermanshah, Kurdistan and Azerbaiyjan provinces and two sensitive and susceptible cultivar ...
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Experiments were carried out in a completely randomized design with 3 replication factorial arrangement. Experimental treatments were including genotype factor (including 15 sea beet samples from Khuzestan, Elam, Kermanshah, Kurdistan and Azerbaiyjan provinces and two sensitive and susceptible cultivar of sugar beet) and salinity factors (concentration of 0, 50, 100 and 400 mM) and drought factors (5 levels of 0, 3, 6, 9 and 12 bar). Results showed that the effect of salinity and drought treatments on germination percentage, radicle, plumule length, radicle, and plumule weight traits were significant and in both experiments with increasing stress intensity germination percentage, radicle and plumule length, radicle and plumule weight traits decreased. In both experiments, the germination percentage trait was less and hypocotyl weight trait more affected by stresses than other traits. Alsoو in both experiments, radicle growth was less affected by stress than the plumule. Statistical estimations showed that there was a significant difference between investigated genotypes for germination percentage, radicle length, plumule length, radicle weight and plumule weight in both experiments. In salinity and drought stress conditions, at least 5 and 7 sea beet genotypes were identified from Elam, Kermanshah, Khuzestan and Azerbaiyjan provinces, which were better in terms of germination and early growth characteristics than sugar beet cultivars. Based on this, it can be concluded that sea beet has high diversity and resistance potential against salinity and drought stresses during germination and early growth stages, and can be used to produce more resistance sugar beet against salinity and drought stresses.
Seyed Keyvan Marashi; Zahra Albaji
Abstract
This research was conducted as a factorial in a completely randomized design with four replications. The studied treatments include salinity stress in the form of irrigation with normal water (0.4) and with salinity of 4 and 8 dS/m of NaCl salt and seed priming with hydrogen peroxide, including no priming ...
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This research was conducted as a factorial in a completely randomized design with four replications. The studied treatments include salinity stress in the form of irrigation with normal water (0.4) and with salinity of 4 and 8 dS/m of NaCl salt and seed priming with hydrogen peroxide, including no priming and seed priming in 25 and 50 mM solutions. In this experiment, the traits of germination percentage, germination rate, root length, stem length, root dry matter, stem dry matter and seed vigor index were investigated. In this research, the effect of salinity stress and hydrogen peroxide was significant on all investigated traits. The interaction effect of salinity stress and hydrogen peroxide on the studied traits was significant except germination rate. The maximum percentage of germination, length and dry matter of root and stem and seed vigor index was obtained under absence of stress (normal water) and application of 50 mM hydrogen peroxide and the minimum was under salinity of 8 dS/m and no application hydrogen peroxide. The maximum germination rate was obtained in the 50 mM hydrogen peroxide and no salt stress. In general, the results showed that the use of hydrogen peroxide in the presence of salinity stress was effective through the improvement of indices, and this can be considered as a strategy for better and proper seedling establishment.
Masume Hoseini Moghaddam; Amin Salehi; rasoul rezaei
Abstract
One of the most important research fields in medicinal plants is the effect of environmental stresses on quantitative and qualitative yield of these plants and finding solutions for improving tolerance to these stresses. In order to study the influence of seed biopriming with Pseudomonas fluorescent ...
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One of the most important research fields in medicinal plants is the effect of environmental stresses on quantitative and qualitative yield of these plants and finding solutions for improving tolerance to these stresses. In order to study the influence of seed biopriming with Pseudomonas fluorescent and Trichoderma harzianum fungi on some germination and seedling indices of fennel (Foeniculum vulgare L.) under drought stress an experiment was conducted as factorial based on a completely randomized design with four replications. Experimental factors included bio-inoculation in nine levels (inoculation with four strains of PF2, PF16, PF56 and CHA0 of Pseudomonas fluorescent, and T13, T36, T39 and T43 strains of T. harzianum and non-primed (control)) and three levels of drought stress (0, -3 and -6 bar imposed by PEG6000). Seed germination and seedling characteristics were evaluated. Results showed that by increasing the osmotic potential levels, germination indices were decreased. In 0 bar, the highest germination percentage, root length and seedling length vigor index were obtained from CHA0 treated seeds and in three levels of stress, the highest germination rate, shoot length, dry weight seedling and seedling weight vigor index related to seed treatments by T39. Compared to non-inoculated seeds, CHA0 increased the root growth by 46, 51 and 51%, respectively, at osmotic potential levels of 0, -3, and -6 bar, respectively. According to the obtained results, it can be concluded using fungus and bacterial treatments can be causing to increasing of germination and seedling characteristic of fennel seeds in optimum and stress condition.
Marziyeh Allahdadi
Abstract
Abstract Considering the importance of proper nutrition of mother plant in the production of seeds with high vigor, a factorial experiment was done in a completely randomized design with 3 replications to study the germination characteristics of artichoke seeds which harvested from mother plants treated ...
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Abstract Considering the importance of proper nutrition of mother plant in the production of seeds with high vigor, a factorial experiment was done in a completely randomized design with 3 replications to study the germination characteristics of artichoke seeds which harvested from mother plants treated with chemical and biological fertilizers, in 2013. Chemical fertilizer treatments consisted of three levels (100% chemical fertilizer, 50% chemical fertilizer and control), and bio-fertilizer consisted of 4 levels (control, inoculation with Nitroxin, inoculation with Barvar 2 and inoculation with both bio-fertilizer). The use of chemical and biological fertilizers in the maternal plant had a positive and significant effect on germination and seedlings growth of artichoke. The results showed that among different levels of chemical fertilizer, the highest 1000 seed weight, germination percent, germination rate, vigor Index, plumule dry weight, radicle dry weight, seedling dry weight, radicle length, plumule length, seedling length was obtained in the residual effects of 100% chemical fertilizer + 100 kg nitrogen per hectare. Seed inoculation with both bio-fertilizer had the maximum amount of mentioned attributes. The control level had the highest mean of germination time. It councluded that application of chemical fertilizers along with biological fertilizers can lead to improvement of most germination indices in artichoke plants by increasing the absorption of nutrients such as nitrogen and phosphorus.
Ali Ebadi; ghasem parmoon; Fatme Ahmadnia; Mohamad Godarzy; S. Ghahremani
Abstract
In order to quantifying cardinal temperature and hydro time germination of Cuminum cyminum seeds, an experiment was conducted as completely randomized design with three replications in laboratory of Faculty of Agriculture and Natural Resources of University of Mohaghegh Ardabili in 2017. Experimental ...
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In order to quantifying cardinal temperature and hydro time germination of Cuminum cyminum seeds, an experiment was conducted as completely randomized design with three replications in laboratory of Faculty of Agriculture and Natural Resources of University of Mohaghegh Ardabili in 2017. Experimental treatments were included: temperatures as, 0, 5, 10, 15, 20, 25, 30, 35 and 40 ˚C and osmotic potential as 0, -0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa. Quantifying of cardinal temperature for germination fraction of 10, 50 and 90 % were evaluated from four models as: beta, modified beta, dent-like and segmented. In this study, RMSE and R2 and AICc were used for comparison between models. Result indicted that beta model showed better responses description for germination rate of Cuminum cyminum to temperature compared with others models. However basic temperature of Cuminum cyminum was between 0.7 to 0.9 ˚C, optimum temperature about 20 to 21 ˚C and maximum temperature was 35 ˚C. In addition based on hydro time models results, θH and Ψb(50) of Cuminum cyminum were estimated 97.5 and -0.46 MPa respectively.
Mohsen Malek; Farshid Hassani; Enayat Rezvani; Vahidreza Mahmoodi; Masoud Khosravi
Abstract
Ferula assa-foetida is one of the important medicinal plants of Apiaceae that has been exposed to extinction with repeated withdrawals from its natural habitat. Study of seed germination behavior of this species can lead to the development of cultivation and protection of its natural habitat. In order ...
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Ferula assa-foetida is one of the important medicinal plants of Apiaceae that has been exposed to extinction with repeated withdrawals from its natural habitat. Study of seed germination behavior of this species can lead to the development of cultivation and protection of its natural habitat. In order to optimal conditions determine for the standard germination test of Ferula assa-foetida seeds (which belongs to the heights of Yasuj city located in Kohgiluyeh and boyer-ahmad provinces), this experiment was designed as factorial in a completely randomized design in six treatments with different levels, with control treatment and in three replications. The experiment was carried out in 2021-2022 in the seed quality analysis laboratory of the Seed and Plant Registration and Certification Research Institute of Karaj, this factorial experiment was conducted based on a completely randomized design. For this purpose, Ferula assa-foetida seeds were evaluated under different temperature regimes (including 10, 15, and 20 °C) and different germination substrates (top of the paper (TP), between paper (BP), and sand (S)). Various pretreatments in the standard germination test process include stratification (for 14 and 35 days at 7 °C) and treatment with different substances (including gibberellic acid, kinetin, and potassium nitrate) as well as the seeds leaching for 24 hours. According to the results, kinetin pre-treatment (250 ppm) and TP seed germination substrate at 10 °C; optimal germination conditions of Ferula assa-foetida seeds were proposed for evaluation of different seed samples.
Leila Yari; Mohammad Reza Jazayeri; Saeed Amini
Abstract
Tomato (Solanum lycopersicum L.) is one of the most important and popular fruit vegetables, to enter a new variety of tomato in the national list of plant varieties of Iran or to obtain the right of a breeder, it is a legal requirement to perform a Distinctness, Uniformity and Stability examination. ...
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Tomato (Solanum lycopersicum L.) is one of the most important and popular fruit vegetables, to enter a new variety of tomato in the national list of plant varieties of Iran or to obtain the right of a breeder, it is a legal requirement to perform a Distinctness, Uniformity and Stability examination. In order to provide morphological description and evaluation of Distinctness and Uniformity19 tomato varieties (15newvarieties and 4check varieties) were examined under greenhouse conditions in 2021and 2022.The experiment was carried out using a completely randomized design with two replications. Varieties were distinguished based on qualitative, pseudo qualitative and quantitative traits such as green shoulder in fruit, fruit shape in longitudinal section, fruit firmness ,Inflorescence type, ribbing at peduncle end in fruit, blistering of leaf, size of blossom scar, size of peduncle scar, depression at peduncle end in fruit, anthocyanin coloration in the upper part of the stem, leaf attitude, intensity of green color in leaf, intensity of green color excluding shoulder (before maturity)in fruit and number of locules in fruit, But Sumurai variety was not distinguished based on qualitative, pseudo qualitative and quantitative traits with compared of Lisa (check) variety. Analysis of variance quantitative traits indicated that evaluated traits such as fruit length and diameter, length to diameter of fruit, pericarp thickness, total diameter of fruit, diameter of core and fruit weight were significantly different at the α=1 % probability level. Also length of leaflets, width of leaflets, width of leaf, diameter of core in cross section in relation to total diameter and peduncle length were significantly different at the α=5 % probability level. These results showed that new varieties had essential uniformity according to standard of International Union for the Protection Of new Varieties of plants.
Ali Shayanfar; Samad Mobasser; Bita Oskouei; Leila Zare
Abstract
Camelina Cv. Soheil seed storability was assessed to simulate after-harvest condition till the following growing season. Seven seed samples were collected from Shirvan, Fasa, Marvdasht, Kermanshah, Hamedan, Sabzevar, and Ilam regions and saved for six months in two storage condition (with two temperatures ...
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Camelina Cv. Soheil seed storability was assessed to simulate after-harvest condition till the following growing season. Seven seed samples were collected from Shirvan, Fasa, Marvdasht, Kermanshah, Hamedan, Sabzevar, and Ilam regions and saved for six months in two storage condition (with two temperatures of 10 and 25ºC). Then, they were drow out monthly from storage condition to evaluate different seed germination index and vigour. Moisture seed content did not acced more than 10 percent in all treatments. Germination percentage and normal seedlings were more than 94% after 6 months of storage in all seed samples and two temperatures. Weight seedling vigour showed no significant differences in all samples, except the Sabzevar sample. The effects of three factors (seed samples, temperature and storage time) on rate germination index were difference. Seed physiological responses (in terms of rate germination) to 10 and 25ºC temperatures were similar until the fourth months in more samples. However, a declining process was observed from the fourth month at 25ºC and from the fifth month at 10ºC for these responses and accend minimum in six months. Two seed samples of Hamedan and Kermanshah showed higher rate of germination. In total, Camelina seeds showed high storage potential due to high germination percentage was recorded after six months of storage. In addition, if seeds stored for more than 4 months, plants in field condition lower germination rate will observe.
Masoomeh Amerian; Mahmoud Khoramivafa; Barakat Alah Rabani
Abstract
in this study, the effect of silver nanoparticles and humic acid on some morphological characteristics of quinoa seedlings under drought stress was investigated. The experiment was performed as a factorial experiment in a completely randomized design with three replications. The experiment consisted ...
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in this study, the effect of silver nanoparticles and humic acid on some morphological characteristics of quinoa seedlings under drought stress was investigated. The experiment was performed as a factorial experiment in a completely randomized design with three replications. The experiment consisted of three levels of silver nanoparticles (0, 10 and 20 mg L-1 AgNPs), three levels of humic acid (0, 100 and 300 mg L-1) and three levels of drought stress (0, -6 and -12 bar). In this study, Titicaca cultivar was used. The highest amount of seed vigor and seed germination rate were observed in the highest level of AgNPs and humic acid, which indicates the positive effect of AgNPs and humic acid on germination percentage, germination rate and quinoa seed vigor. According to the obtained results, drought stress led to a decrease in germination percentage and growth characteristics of quinoa seeds. AgNPs and humic acid had a positive effect on germination and growth characteristics of quinoa seedlings under drought stress conditions compared to control treatment. With increasing the concentration of AgNPs and humic acid, the amount of proline, soluble sugars, total phenol, flavonoids and catalase activity under drought stress increased, indicating the positive role of AgNPs and humic acid to increase drought tolerance in quinoa. Therefore, the use of humic acid at a concentration of 300 mg L-1 along with 20 mg L-1 AgNPs is recommended to improve germination and seed growth of quinoa under drought stress conditions
Nasrin Teimoori; Mokhtar Ghobadi; Danial Kahrizi
Abstract
Camelina oilseed has a lot of ability to be placed in the cultivation pattern of Iran's drylands. The seed germination and seedling establishment in dryland agriculture are usually exposed to drought stress. The aim of this study is to investigate the application effect of silicon concentrations in improving ...
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Camelina oilseed has a lot of ability to be placed in the cultivation pattern of Iran's drylands. The seed germination and seedling establishment in dryland agriculture are usually exposed to drought stress. The aim of this study is to investigate the application effect of silicon concentrations in improving the seed germination characteristics and seedling growth of camelina under drought-stress conditions. The experiment was conducted as a factorial based on CRD with three replications at the seed laboratory of Razi University. The factors include camelina genotypes (Sohail and Line-84), drought stress (0, -3, -6, -9 bar using PEG-6000) and silicon (0, 2, 4, 6 and 8 mM using sodium silicate). According to the results, increasing the drought stress decreased the seed germination characteristics and the seedling growth. However, germination percentage, germination rate, seedling length, seedling dry weight, seedling vigor indices and allometric coefficient of plumule to radicle weight were increased by silicon. To increase the measured traits, silicon 6 and 8 mM were better than other concentrations. In general, silicon was effective in mitigating the effects of drought stress on the seedling growth of camelina by improving the seed germination characteristics and seedling growth. Therefore, it seems that the silicon is an effective factor in such studies and its usability in camelina seed technology and seed coating for dryland areas.
Haniyeh Saadat; Mohammad Sedghi
Abstract
In order to investigate the effect of hydropriming and hormone priming on some physiological and biochemical characteristics in chickpea under salinity stress a factorial experiment was conducted based on completely randomized design at the University of Mohaghegh Ardabili in 2023 with 3 replications. ...
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In order to investigate the effect of hydropriming and hormone priming on some physiological and biochemical characteristics in chickpea under salinity stress a factorial experiment was conducted based on completely randomized design at the University of Mohaghegh Ardabili in 2023 with 3 replications. treatments included four salinity levels (0, 50, 75 and 100 mM) and four levels of priming (control, hydropriming, priming with gibberellin (50 ppm) and salicylic acid (100 ppm)). The results showed that salinity stress reduced germination percentage (GP), germination rate (GR), radicle and Seedling length (RL and SL) But, seed priming improved these traits. Salinity increased the allometric coefficient (AC), So that the highest was observed at (0.860) salinity of 100 Mm. The highest mean daily germination (MDG), plumule length (PL) and total seed protein content were observed in priming with gibberellin and control (without salinity). The maximum DGS (0.144) and MDA (0.0137 mmol/g FW) were related to the treatment with without priming and salinity of 100 mM. The amount of soluble sugars in gibberellin treatment and salinity of 100 mM compared to the control showed an increase about 56%. Also, the use of gibberellin increased amount of proline by about 40% compared to the control (without priming). In general, seed hydropriming, salicylic acid, especially gibberellin
Masoomeh Amerian; Ali Reza Khosravi
Abstract
In order investigate the effect of salinity and selenium on seed germination of three medicinal plants dragons head, alyssum and chicory, this study was performed as a factorial experiment based on a complete randomized design with two factors including different levels of salinity and selenium in three ...
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In order investigate the effect of salinity and selenium on seed germination of three medicinal plants dragons head, alyssum and chicory, this study was performed as a factorial experiment based on a complete randomized design with two factors including different levels of salinity and selenium in three replications. The first factor included 0, 2, 4, and 8 mM NaCl and the second factor was 0, 5, 10, and 20 mg L-1 sodium selenate levels. Unlike selenium, salinity reduced germination percentage, germination characteristics and initial growth in all three medicinal plants. The germination percentage of chicory was 40%, alyssum was 49.1% and dragons head was 52.5%, which indicates that chicory is more sensitive to salinity stress, while dragons head showed more tolerance to salinity stress. With increasing selenium concentration, seedling length in all three medicinal plants increased compared to the control. The highest seedling length (20 mm) was observed in treatment 20 mg L-1 sodium selenate with a concentration of 8 mM NaCl in alyssum. The lowest seedling length was in chicory (6.2 mm) and in 0 mg L-1 sodium selenate treatment with 8 mM NaCl. The use of selenium can improve germination characteristics and to some extent reduce the effects of salinity stress. In general, it can be concluded that selenium (at the level of 20 mg L-1 of sodium selenate) can increase seed germination and seedling growth of all three medicinal plants under salinity stress.
Parvin Salehi; Hamideh Javadi; Leila Rasoulzadeh; Leila Falah Hoseini
Abstract
In this study, the effect of short-term storage conditions in one season on the characteristics of seed germination of 3 species of Nepeta was studied. A factorial experiment was conducted. Treatments included 1) Storage period (in five levels 0, 1, 2, 3 and 4 months), 2) storage temperature (at three ...
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In this study, the effect of short-term storage conditions in one season on the characteristics of seed germination of 3 species of Nepeta was studied. A factorial experiment was conducted. Treatments included 1) Storage period (in five levels 0, 1, 2, 3 and 4 months), 2) storage temperature (at three levels of the laboratory environment, cold storage +4 and -18 °C), and 3) germination treatment (at two levels of control and gibberellin 250 ppm). The results showed that the germination characteristics of different species are different at the time of harvest, So that at the time of harvesting, N. glomerulosa with 29% showed lower germination compared to two species, N. haussknechtii and N. pogonosperma, with 87 and 89% germination. Storage for 3 to 4 months increased the germination percentage of N. glomerulosa about 53% and N. haussknechtii and N. pogonosperma about 10%. It can be concluded that N. glomerulosa has primary dormancy, and by keeping it for four months, the post-harvesting demands of this species are released. While the species N. haussknechtii and N. pogonosperma did not have primary dormancy. The study of seed storage at +25, +4 and -18 °C showed that the best temperature for short-term seed storage, until the next cropping season, for N. glomerulosa subsp. Staffina is temperature +4 °C and for N. haussknechtii and N. pogonosperma is -18 °C. The germination behavior of N. haussknechtii and N. pogonosperma are very similar and is completely different from N. glomerulosa subsp. Staffina.
Reza Taherdoost; Mahmood Dejam; Mehdi Madandoust; Farhad Mohajeri
Abstract
The use of sulfur (S) is of special interest in arid and semi-arid Iran since most soils are calcareous. In order to improve germination, seedling growth, and quality of Nigella sativa L. seeds obtained from mother plants grown under drought stress conditions, this investigation was performed in split ...
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The use of sulfur (S) is of special interest in arid and semi-arid Iran since most soils are calcareous. In order to improve germination, seedling growth, and quality of Nigella sativa L. seeds obtained from mother plants grown under drought stress conditions, this investigation was performed in split plots with a completely randomized block design with three replications in research farm Fasa City in 2022. The main factor was irrigation after 25, 50 and 75 percent of soil moisture depletion and the subplots were fertilizer in 8 levels including 100 % S, 50% S + thiobacillus, 50% S + mycorrhiza, 50% S+ thiobacillus+ mycorrhiza, thiobacillus, mycorrhiza, thiobacillus+ mycorrhiza and control. The results showed that in irrigation with 75 percent soil moisture depletion, the integration of 50% S+ thiobacillus+ mycorrhiza decreased the seed membrane stability by 23 percent compared to the control. In an irrigation regime with 75 percent moisture depletion, the integration of 50% S+ thiobacillus+ mycorrhiza and 50% S+ mycorrhiza caused a 31 percent increase in amylase activity in seeds endosperm about control. The highest germination percent and rate are also observed in the integration of 50% S+ thiobacillus+ mycorrhiza. Moreover in the treatment with 75 percent soil moisture depletion, the 50% S+ thiobacillus+ mycorrhiza increased the seed vigor to 46 percent. With regards to the positive effects of sulfur integration with Thiobacillus and mycorrhiza in the improvement of the quality of seeds derived from black cumin under drought stress, the use of these biological compounds should be recommended.
Abbas Hashemi; F. Sharifzadeh; Reza Maali Amiri; Reza Tavakkol Afshari
Abstract
Safflower (Carthamus tinctorius L.) is an important industrial plant, which classified in the category of oil plants. The tolerance of plants to drought is different, as well as Plants have different temperature and water requirements, and understanding this requirement helps them survive and reproduce. ...
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Safflower (Carthamus tinctorius L.) is an important industrial plant, which classified in the category of oil plants. The tolerance of plants to drought is different, as well as Plants have different temperature and water requirements, and understanding this requirement helps them survive and reproduce. Therefore, the purpose of this study was to evaluate the germination characteristics of safflower seeds at different temperatures and humidity and the adaptation power of this plant under these conditions. For this purpose, germination of safflower seed (Faraman cultivar) was investigated in incubator at constant temperatures of 5, 10, 15, 20, 25, 30, 35 and 40 ° C. in this study, 3 regression model including, Beta model, Dent like model and segmented model were used to determine cardinal safflower temperatures. Then, to investigate germination and seedling growth response of Carthamus tinctorius toward different levels of Water Deficite Stress at an optimum temperature, another test was conducted. in this experiment, seed germination was assessed in six levels of Water Deficite Stress with the osmotic potential of 0, -3, - 5, -7 and -9 bar (in temperatures of 20 ° C). Based on Beta model, Dent like model and segmented model, the cardinal temperatures of Carthamus tinctorius seeds germination including, (Tbase, Topt and Tmax) were: (4.6, 4.1, 4.1), (22.02, 20 – 24.3, 22.5) and (43.3, 50.3, 50.3) °C, respectively.
Mohammad Reza Mirzaei; Babak Babaee
Abstract
In this experiment, physical and chemical characteristics of sugar beet seed and its relationship with germination traits was studied. This traits were evaluated on 10 sugar beet singles crosses that obtained from three locations including Ardabil, Firuzkuh, and Karaj. Results showed that bulk density, ...
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In this experiment, physical and chemical characteristics of sugar beet seed and its relationship with germination traits was studied. This traits were evaluated on 10 sugar beet singles crosses that obtained from three locations including Ardabil, Firuzkuh, and Karaj. Results showed that bulk density, true density and electrical conductivity are influenced by environment and genotype. Percentage of solids soluble in sugar beet pericarp (germination inhibitors) it was only affected by the seed production environment. Both genetics and environmental conditions on the maternal plant during seed development and maturing were effective on germination percentage, germination velocity and mean germination time. But the germination uniformity of sugar beet seeds was only affected by genotype. On the other, the correlation between bulk density, true density, electrical conductivity, porosity and percentage of solids in pericarp solution of sugar beet seeds with some germination traits was significant. But, the germination uniformity had no correlation with the physical and chemical properties of seed. Increased density of the seed pericarp caused decrease of seed quality factors including electrical conductivity and percentage of solids solution on pericarp. Therefore, germination uniformity, which is less affected by the environment, can be used in breeding programs as indicator of seed quality selection. Physical and chemical traits that was a significant correlation with germination traits, in the management of sugar beet seed production with the aim of increasing the extraction coefficient and quality of sugar beet seeds are recommended.
Ramin Soltani; Jafar Asghari; Enayat Rezvani; Babak Rabiei
Abstract
Considering the questions about the reasons for the decline in the quality of corn seeds in Moghan, especially regarding the management of corn cob dryers, this experiment was conducted in order to diagnose the effect of the dryer function on seed quality. For this purpose, 24 samples of corn seed variety ...
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Considering the questions about the reasons for the decline in the quality of corn seeds in Moghan, especially regarding the management of corn cob dryers, this experiment was conducted in order to diagnose the effect of the dryer function on seed quality. For this purpose, 24 samples of corn seed variety 704 were prepared in two stages from nine seed processing stations in 2018. 12 cobs from the shipment were transported from the field and before entering the dryer and 12 dried cobs of the same shipment were randomly registered and tested in the National Seed Quality Laboratory. In addition to laboratory tests, each sample was cultivated in the field in the form of a RCBD in three replications. According to the results there is no significant difference between the sampling time before and after drying. The interaction of processing station and sampling time, except in two stations, did not show any significant difference on seed quality indicators. Based on the results, in the stations with higher output seed quality, the cobs were harvested with a moisture content of 25-29% and aerated at a temperature of 32-35℃ and after reaching the average moisture content of the mass about 20%, the temperature increased to 38℃. According to the results, the dryers function has a minor role in causing damage to seeds and reducing seed quality, and due to the low germination power of seeds produced in farms, other factors including farm management are effective in reducing the quality of corn seeds.
Volume 1, Issue 2 , December 2012, , Pages 147-160
Abstract
To study the effects of mother plant delayed sowing date on seed germination and seed vigor of 10 spring rapeseed cultivars, an experiment was conducted in two years (2006-2007). In the first year, 10 cultivars of spring rapeseed were planted in research field of seed and Plant Improvement Institute, ...
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To study the effects of mother plant delayed sowing date on seed germination and seed vigor of 10 spring rapeseed cultivars, an experiment was conducted in two years (2006-2007). In the first year, 10 cultivars of spring rapeseed were planted in research field of seed and Plant Improvement Institute, Karaj, Iran, in two dates: 7th October (on time sowing) and 6th November (delayed sowing date). In the second year, standard germination test and electrical conductivity test were conducted to study seed performance grown in first year experiment. A factorial experiment in randomized complete block design was used. According to the results, the seeds of two Sowing dates were significantly different on the point of 1000 seed weight, seed density, length and dry weight of seedling, radical and plumule, germination percentage, germination rate index, seedling vigor index and electrical conductivity. In addition, the effect of cultivar was significant on seed density, dry weight of plumule and seedling, seedling vigor index and electrical conductivity. The seeds of on time planting date had higher seed vigor than delayed sowing date. Elite cv had high seed weight than other cultivar. The seed weight could be used as a valuable index to determine seed vigor
Volume 2, Issue 2 , December 2013, , Pages 173-184
Abstract
In order to evaluate the role of seed osmopriming on the emergence, seedling establishment, grain yield and yield components of three soybean cultivars a factorial experiment was conducted on the basis of randomized complete blocks design with three replications at research farm of Tarbiat Modares University ...
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In order to evaluate the role of seed osmopriming on the emergence, seedling establishment, grain yield and yield components of three soybean cultivars a factorial experiment was conducted on the basis of randomized complete blocks design with three replications at research farm of Tarbiat Modares University on summer 2010. Experimental materials were threesoybeancultivars (Telar, DPX and 032) producedunderdifferent levels ofwaterdeficit (irrigation after 50, 100 and 150 mm evaporation from evaporation pan class A) in the field of Seed and Plant Improvement Institute, Karaj in previous years. Seed osmopriming in five levels includes osmotic potentials -5, -10, -15 and -20 bar created by PEG6000 andnonpriming(control). Results showed that water deficit stress on mother plant decreased field emergence percentage and field emergence rate. However seed osmopriming improved emergence percentage, emergence rate and grain yield of seeds produced in diffrent irrigation conditions so that in seeds exposed to mild and sever stress condition, osmopriming with solution -20 bar increased the traitsmeasured incomparisonwithcontrol. The most grain yield and pod number.plant-1 was observed in seed osmopriming by -15 bar potential. It seems that the use of osmopriming is appropriate for compensation water deficit stress and improvement field emergence and grain yield
Volume 3, Issue 2 , December 2014, , Pages 189-200
Abstract
In order to evaluate cardinal temperatures of milk thistle (Silybum marianum)germination an experiment was carried out in the laboratory of Plant Production College, Gorgan University Agricultural Science and natural resources. Seven temperatures in a completelyrandomized design with four replications ...
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In order to evaluate cardinal temperatures of milk thistle (Silybum marianum)germination an experiment was carried out in the laboratory of Plant Production College, Gorgan University Agricultural Science and natural resources. Seven temperatures in a completelyrandomized design with four replications was used. Temperatures were 5 to 35ºC by 5ºC intervals. The seeds with 2 mm radicles were counted as germinated seeds.The germination rate percentage and cumulative seed germination percentage were calculated for each given temperatures.Cardinal temperatures (T-base, T-optimum and T-ceiling), also, were estimated using eight non linear regression models. The effect of temperature on total germination percentage, time to 50% germination (D50) and germination rate based on 1/D50 and mean germination time inverse (1/MGT) was significant at 1% of probability level. Results indicated that by increasing temperature up to 15ºC germination increased and after that declined. Based on the highest R² and the lowest MAE and RMSE segmented model was determined as the superior model. Thus, Tb, To and Tc for D50 (time to %50 germination) were estimated as 2.75, 31.51 and 38 using segmented model.To calculate germinationrate 1/D50 index was better than 1/MGT due to higher regression coefficient and less RMSE.
