mahmood reza Bahrami; Mohammad Khajeh-Hosseini
Abstract
It seems mucilaginous seed coat is an aspect of plants evolutionary adaptation to desert environments. Because of mucilage production, seed coat of Balangu Shirazi (Lallemantia royleana) absorbs water multiple times more than of its initial weight. To determine the possible role of mucilaginous seed ...
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It seems mucilaginous seed coat is an aspect of plants evolutionary adaptation to desert environments. Because of mucilage production, seed coat of Balangu Shirazi (Lallemantia royleana) absorbs water multiple times more than of its initial weight. To determine the possible role of mucilaginous seed coat, two mucilaginous (M) and demucilaged (DM) seeds were examined in two separate experiments of drought with six levels (0 as control, -0.1, -0.2, -0.3, -0.4,and -0.5 MPa) and salinity with six levels (0 as control, 2, 4, 6, 8, and 10 ds.m-1) through factorial experiment as completely randomized design with three replications of 25 seeds. Germination of demucilaged seeds significantly was higher than mucilaginous seed in drought trial; though in salinity stress, there was no significant difference between germination of mucilaginous and demucilaged seeds. Mean germination time (MGT) in mucilaginous seeds was higher than the demucilaged seeds in both salinity and drought stresses. In salinity experiment, length of root, stem and stem/root length ratio in mucilaginous seed was higher than the demucilaged seed significantly; while there was no any differences in drought stress. Interaction of seed with drought was not significant but there was significant interaction between seed and salinity.
parisa mahmoodi; Mohammad Khajeh-Hosseini; Mohammad Rashed-Mohassel; Yousef Emamipoor
Abstract
To study the effect of gibberellic acid and potassium nitrate treatments on germination and seed dormancy of 14 medicinal plant species from the Lamiaceae, that were collected in the spring and summer of 1392 from their natural habitates in Kerman province, two separate laboratory experiments were conducted ...
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To study the effect of gibberellic acid and potassium nitrate treatments on germination and seed dormancy of 14 medicinal plant species from the Lamiaceae, that were collected in the spring and summer of 1392 from their natural habitates in Kerman province, two separate laboratory experiments were conducted at 20-24 centigrade degree, based on completely randomized design with 4 replications of 25 seeds. In the first experiment, seed germination was considered in H2O. The results indicated that the highest germination percentages were observed in Ocimum basilicum (%96) and Salvia macrosiphon (%95) while the lowest germination were obtained in Marrubium crassidens (%5) and Nepeta bracteata (%0). In the second experiment, the effect of seed dormancy breaking treatments such as gibberellic acid (GA3) with 3 concentrations (250, 500 and 1000 ppm) and potassium nitrate with 2 concentrations (500 and 1000 ppm) were practiced on the germination of 10 plant species with low germination (below %80) in H2O. Dormancy breaking treatments were effective on 9 species (i.e. Marrubium crassidens and Ocimum santum) out of 10 species. In most studied species, dormancy breaking treatments increased germination percentage and Mean Germination Time were reduced. Therefore, based on their reactions to the treatments, it was found that these 9 species have physiological dormancy.
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.
A.J. Yanegh; M. Khajeh-hosseini; M. Kafi
Abstract
In order to evaluate of seed lots germination in early stages of germination test beginning as a rapid method to evaluate the seed vigour, seed samples from twenty seed lots of oilseed rape, from four varieties (Okapy, Hyola 401, Opera and Licord) produced in 1386 to 1390 was provided. Standard ...
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In order to evaluate of seed lots germination in early stages of germination test beginning as a rapid method to evaluate the seed vigour, seed samples from twenty seed lots of oilseed rape, from four varieties (Okapy, Hyola 401, Opera and Licord) produced in 1386 to 1390 was provided. Standard germination test carried out in Seed Research Laboratory and soil emergence of seed lots examined in the Research Greenhouse of the Ferdowsi University of Mashhad, Iran. The results showed that the percentages of final germination and normal seedlings and mean germination time had a high correlation (r = 0.84, 0.89 and 0.82, respectively) with the soil emergence of the lots. Germinated percentages in the early days of the test had significant correlation with characteristics of germination and soil emergence of the seedlots. So that, the percentages of germinated seeds on days two and three, correlated with mean germination time (r= 0.97 and 0.92) and with normal seedlings (r = 0.88 and 0.81) and with soil emergence (r = 0.83 and 0.83) respectively. Therefore, the percentages of germinated seeds in the early stages of germination can be used as an alternative and rapid method to assess the final germination, normal seedlings, mean germination time hence seed vigour of oilseed rape.
A.R. Rabiei; A. Nezami; M. Goldani; M. Khajeh-Hosseini; M. Nassiri Mahallati
Abstract
Harvesting of medicinal plants from their natural habitats, put them in danger, hence their domestication is needed. In this context, knowledge of the properties of these plants, including the cardinal germination temperatures are necessary. In order to determine the cardinal temperatures and the effect ...
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Harvesting of medicinal plants from their natural habitats, put them in danger, hence their domestication is needed. In this context, knowledge of the properties of these plants, including the cardinal germination temperatures are necessary. In order to determine the cardinal temperatures and the effect of temperature on the percentage and rate of germination in Plantago major ecotypes (Birjand, Ghaen, Torbathydarieh, Mashhad, Kalat and Bojnord) an experiment was conducted based on factorial in a completely randomized design with 9 temperature levels (5, 10, 15, 20, 25, 30, 35, 40 and 45 °C) and four replications in Crop Physiology Laboratory, Ferdowsi University of Mashhad in 2013. To determine the cardinal temperatures Intersected-Lines Model and Five-Parameters Beta Model were used. Results showed that maximum germination percentage was obtained at 30 °C while maximum germination speed achieved at 35 °C in Bojnourd and Birjand ecotypes, respectively. The highest germination percentage was observed in Birjand ecotype at the temperature range of 20 to 35 °C. Based on models fitted depending on the ecotype, cardinal temperatures (minimum, optimum and maximum) germination were determined (6.3 to 9.8, 1.8 to 5°C) ,(31.1 to 35.9, 28.6 to 35.2°C) and (43.3 to 45.1, 45 to 45.6 °C) of Intersected-lines and Five-Parameters Beta Model, respectively. Diversity in cardinal temperature of plantago major ecotypes could be due to different environmental conditions where they were evolved and adapted
M. Khajeh-Hosseini; M. Alinaghizadeh; S.A. Hosseini; M.H. Rashed Mohasel
Volume 5, Issue 2 , January 2016, , Pages 199-213
Abstract
In order to study the seed germination and dormancy of 3 weed species (Prosopis farcta, Launaea acanthodes and Cressa cretica) of pistachio orchards in Rafsanjan, Iran, three factorial experiments were conducted based on completely randomized design with four replications, at the faculty of agriculture, ...
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In order to study the seed germination and dormancy of 3 weed species (Prosopis farcta, Launaea acanthodes and Cressa cretica) of pistachio orchards in Rafsanjan, Iran, three factorial experiments were conducted based on completely randomized design with four replications, at the faculty of agriculture, Vali-E-Asr university of Rafsanjan, Iran, in 2014. Weed seeds were collected from five different regions of Rafsanjan, including Markazi, Anar, Koshkoiyeh and Nogh. Dormancy breaking treatments for P. farcta included scarification by scalpel and sandpaper, chemical scarification by sulfuric acid (30 and 40 min), and distilled water as control. Treatments for L. acanthodes included gibbereilic acid (250, 500 and 1000 ppm), KNO3 (500 and 1000 ppm), cold stratification (for 1, 3 and 5 weeks). Treatments for C. cretica included scarification by scalpel and sandpaper, sulfuric acid (5 and 10 minute), boiling water (for 15 and 30 min) and distilled water as control. Results showed that seed germination percentage (SGP) and mean germination time (MGT) was significantly different among different weed populations and dormancy breaking methods. Seed scarification by scalpel and sulfuric acid resulted in highest SGP in P. farcta and C. cretica. For all L. acanthodes populations, cold stratification for 5 weeks increased SGP, especially in Anar (94 %). Using KNO3 at 500 ppm, and 250 ppm gibbereilic acid, significantly increased germination percentage of L. acanthodes seeds (79 and 74.8 %, respectively), but higher concentration of KNO3 and gibbereilic acid, reduced germination percentage.
Volume 4, Issue 1 , March 2015, , Pages 27-38
Abstract
In order to investigate the effects of increasing soluble phosphorus (P) on seed production and quality of black seed (Nigellasativa L.) in a calcareous soil, a field experiment was conducted at Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. Field experiment was conducted as factorial ...
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In order to investigate the effects of increasing soluble phosphorus (P) on seed production and quality of black seed (Nigellasativa L.) in a calcareous soil, a field experiment was conducted at Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. Field experiment was conducted as factorial layout based on a complete randomized block design with four replications. The fertilizer resources (vermicimpost (V) + Tiobacilus (T), Sulfur (S) + T, V+S+T and control) and three levels of P (0, 30 and 60 kg.ha-1) were the first and second experimental factors, respectively. Seed vigor was also assessed by radicle emergence (RE) test for further evaluation of the effects of P on mother plant on the quality of producing seeds. A germination percentage at day 4 was used as seed vigor test. The resources of soil amendment (V+T, S+T and V+S+T) significantly decreased the P concentration in coat, P percentage of coat to seed and mean germination time. For instance, by applying V+S+T, P concentration in coat and mean germination time were decreased by 18 and 10%, as compared to control treatment.However, 1000 seed weight, seed vigor, P concentration in embryo and seed were significantly increased by applying the resources of soil amendment. There was a significant negative relationship between 1000 seed weight and P concentration in coat (R2= 0.66 **). It seems that under P-deficient conditions in soil, mother plant prefer to produce more longevity seeds, instead to increase theseed vigor, by increasing the P allocation to seed coat
S.M. Seyyedi; P. Rezvani Moghaddam; M. Khajeh Hosseini; H. Shahandeh
Volume 5, Issue 1 , March 2015, , Pages 93-105
Abstract
In order to investigate the role of quality yield characteristics and fatty acids composition on seed quality of black seed (Nigella sativa L.) in a calcareous soil, a field experiment was conducted at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. A complete randomized block ...
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In order to investigate the role of quality yield characteristics and fatty acids composition on seed quality of black seed (Nigella sativa L.) in a calcareous soil, a field experiment was conducted at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. A complete randomized block design was used based on factorial arrangement. In the field experiment, the fertilizer resources (vermicimpost (V) (10 ton ha-1) + Tiobacilus (T), Sulfur (S) (20 ton ha-1) + T, V+S+T and control) and three levels of P (0, 30 and 60 kg.ha-1) were the first and second experimental factors, respectively. Based on proximate analysis of black seeds, V+S+T had a highest significant effect on increasing crude protein, essential (volatile) oil and fixed oil, as compared to control treatment. The applying V+T, S+T and V+S+T had significant decreasing effects on linolenic acid (by 53, 42 and 63%, respectively), as compared to control. The highest linoleic acid (cis) was observed significantly by applying V+S+T. There was the highest significant relationship between linolenic acid and seed vigor (R2=0.69**). Based on our results, vermicompost, especially in combination with sulfur application treatment, can be suitable approach to increasing the fixed oil quality of black seed
Volume 3, Issue 2 , December 2014, , Pages 211-222
Abstract
To investigate the role of mucilage in germination of medicinal plants in drought stress conditions, germination test conducted on 4 replications of 25 seeds of 13 species of medicinal plants with mucilage from the families of Lamiaceae, Brassicaceae, Fabaceae, Linaceae and Plantaginaceae in 9 cm diameter ...
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To investigate the role of mucilage in germination of medicinal plants in drought stress conditions, germination test conducted on 4 replications of 25 seeds of 13 species of medicinal plants with mucilage from the families of Lamiaceae, Brassicaceae, Fabaceae, Linaceae and Plantaginaceae in 9 cm diameter petridishes with filter paper premoistined with distilled water in the Seed Laboratory, Faculty of Agriculture, Ferdowsi University of Mashhad in 2012. Different levels of waterpotential (0, -0.1, -0.2, -0.3, -0.4 MPa) using PEG applied and germination percent and mean germination time (MGT) of the species were determined.Results showed osmotic potential levels had a significant effect on the germination percent and mean germination time (MGT) of the species (P≤0.01). P. psylliumM. officinalis and L. usitatissimum were tolerant while, S.officinalis,A.homalocarpum and P.major were sensitive species and other species showed moderate tolerance. It seems amount of the mucilage of species was effective on tolerance of the species. The positive effect of the mucilage on the reduction of stress in the majority of the species may have an ecological benefit in the harsh conditions for the germination of the species with mucilage.
Volume 1, Issue 2 , December 2012, , Pages 203-221
Abstract
To determine relationship between mean germination time (MGT) and seed vigour in maize Hybrids and liness an experiment was conducted in the Faculty of Agriculture, University of Ferdowsi in year 2008. Germination test was carried out utilizing six maize Hybrids and liness (DC370, SC704, KSC400, OSSK713, ...
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To determine relationship between mean germination time (MGT) and seed vigour in maize Hybrids and liness an experiment was conducted in the Faculty of Agriculture, University of Ferdowsi in year 2008. Germination test was carried out utilizing six maize Hybrids and liness (DC370, SC704, KSC400, OSSK713, SC700, B73) in a randomized completely design with four replicates of 25 seeds per replication at 24anddeg;C. Results indicated germination of Hybrids and liness ranged from 86 to 96 percentages. DC370 Hybrids and lines had significantly the lowest normal seedlings (60%) and the lowest seedlings length (16.7 cm) while OSSK713 had the highest seedlings length (20.7 cm). MGT of B73 Hybrids and lines was the highest (3.9 days) and its coefficient variation (CV) of seedling length was significantly the greatest (6.58%) (low seed vigour). Significantly negative correlation between MGT and germination percentage (r = -0.84) was found while positive correlation between MGT with CV of seedling length was shown, that means a larger variation on seedling length in Hybrids and liness with slow germination rate (higher MGT). Therefore, it was concluded that MGT is a good indicator to assess the maize seed vigour.
