seyyed esmaeil mousavi; Heshmat Omidi
Abstract
To study the effect of biological treatment on germination and growth indices and pigments of flaxseed under salinity stress, a factorial experiment in a completely randomized design was conducted in three replications at the faculty of agriculture of Shahed University in 2018. Experimental treatments ...
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To study the effect of biological treatment on germination and growth indices and pigments of flaxseed under salinity stress, a factorial experiment in a completely randomized design was conducted in three replications at the faculty of agriculture of Shahed University in 2018. Experimental treatments were salinity at four levels (zero, 2.5, 5 and 7.5 dS/m) and biological treatments at four levels (control, bacteria (Baccillus subtilis), fungi (Macrophomina phaseolina) and combination of bacteria and fungi). Effect of biological treatment was significant on germination percentage and the highest germination percentage (99 %) obtained at fungi treatment. Effect of salinity and biological treatment was significant on mean germination time and germination coefficient. The minimum mean germination time (3.79 days) obtained at combination of bacteria and fungi treatment that shows this treatment was most effective in compared with other biological treatments. With increasing of salinity, mean germination time increased. Salinity reduced radicle, plumule and seedling length. The means related to radicle length at the different levels of salinity at biological treatment of fungi was highest amount in compared with other biological treatments. Interaction effect of salinity and biological treatment was significant on chlorophyll a and total chlorophyll. With increasing of salinity, reduced pigments. Maximum amount of chlorophyll a (16.52 µm.ml1-) was obtained at the control treatment of biological treatment and zero salinity. The result of this research showed that using of microorganisms such as fungi and bacteria in salinity stress, can reduce the negative effects of salinity on germination and growth of this plant.
Zohreh Molavi; Abbas Biabani; Ali Nakhzari Moghadam; ali rahemi-karizaki
Abstract
In order to investigate the effect of drought stress on germination parameters and heterotrophic growth of different wheat cultivars, a factorial experiment was carried out in a completely randomized design with 6 replications in a research greenhouse of Faculty of Agriculture and Natural Resources, ...
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In order to investigate the effect of drought stress on germination parameters and heterotrophic growth of different wheat cultivars, a factorial experiment was carried out in a completely randomized design with 6 replications in a research greenhouse of Faculty of Agriculture and Natural Resources, University of Gonbad-e- Kavous in 2016-2017 .The treatments were included wheat cultivars in 5 levels (Aftab, Qaboos, Kohdasht, Karim and Line 17) and drought stress in four levels (full irrigation as the control, slight water stress (25% water depletion of field capacity) , intensive water stress (50% water depletion of field capacity) and very intensive water stress (75% water depletion of field capacity). The results of this experiment showed that maternal drought stress was significant only on radicle dry weight, plumule dry weight and seed vigor. There was a significant positive correlation between plumule dry weight, plumule length and seed vigor. It can be said that drought stress can greatly affect the seed vigor of different wheat cultivars. So that seed vigor of different cultivars was different at each stress level. The effect of cultivar was significant on all traits except radicle dry weight. Therefore, germination and seedling growth were more affected by cultivars. Regarding the negligible effect of drought stress on most germination traits, it can be concluded that genetic than environment (maternal drought stress) had a more effective effect on germination and heterotrophic characteristics of seedlings of wheat seeds
zeinab taghizadeh; hossein sabouri; Hossein Hosseini, Moghaddam; Fallahi Hossein Ali; Mahnaz Katouzi
Abstract
Seed germination is a manifest characteristic of the standard germination test of a cultivated variety. In order to identify genomic regions associated with seed germination, 103 family of barley in F3 and their parents Badia and Kavir were cultivated in 2015-2016, under normal and drought stress conditions. ...
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Seed germination is a manifest characteristic of the standard germination test of a cultivated variety. In order to identify genomic regions associated with seed germination, 103 family of barley in F3 and their parents Badia and Kavir were cultivated in 2015-2016, under normal and drought stress conditions. Different traits including Plumule length, Radicle number, Cleoptil length, Radicle Dry weight, Plumule Dry weight and germination speed were measured. In this study, 28 pairs of microsatellite primers were used to determine the parental polymorphism. QTL analysis using composite interval mapping (CIM) for each trait in each environment for all studied traits. In general, twenty seven QTLs were detected for all traits. Total phenotypic variance explained by these QTLs varied from 8.6 to 37.3 percent. The highest LOD value for QTL controlling Radicle number (LOD=10.45) was obtained on chromosome 4 qNR-4a -15 in drought stress The results revealed that QTLs of Radicle number had desirable performance in all two environments. However, detected stable and cluster QTLs may be used in marker assisted selection (MAS) programs.
M. Janalizadeh Ghazvini; A. Nezami; H.R. Khazaie; M. Goldani; H. Feizi
Abstract
In order to investigate the effect of magneto priming on seed germination of sesame seed under water stress conditions, a factorial experiment based on a completely randomized design with three replications was carried out in 2014 in Ferdowsi University of Mashhad. Dry seeds of sesame exposed to magnetic ...
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In order to investigate the effect of magneto priming on seed germination of sesame seed under water stress conditions, a factorial experiment based on a completely randomized design with three replications was carried out in 2014 in Ferdowsi University of Mashhad. Dry seeds of sesame exposed to magnetic fields (control (no priming), 25 mT[1] for 10 minutes and 75 mT for 60 minutes) bulky, then they treated by Polyethylene glycol 6000 (PEG6000) with different potentials (control (distilled water), -2, -4, -6 and -8 bar). Finally, germination traits such as germination percentage, germination rate, plumule and radicle length, dry weight of plumule and radicle and seedling length and seedling weight vigour indices were measured. The results showed that magneto priming led to increment of germination rate, radicle and plumule length, radicle dry weight and seedling length and seedling weight vigour indices, especially in high levels of water stress compared with control treatment. Radicle length of magneto primed sesame seeds with 75 mT (for 60 minutes) in -8 bar was 16.6% and radicle dry weight of magneto primed seeds with 25 mT (for 10 minutes) at the same level of water stress, was 64.4% more than control (no priming). In addition in -8 bar potential, due to priming with 75 and 25 mT intensities of magnetic fields, seedling length and weight vigour indices enhanced 38% and 22.6%, respectively, in comparison to control treatment. [1] mili Tesla
A. Nezami; H.R. Khazaie; A.R. Barjasteh
Abstract
Because of the importance of the role of maternal environment during seed development on germination of produced seed and seedling establishment an experiment in a randomized complete block design base as a factorial was conducted to evaluate effects of drought stress (0.0, -0.2, -0.4, -0.8 and -1 MPa) ...
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Because of the importance of the role of maternal environment during seed development on germination of produced seed and seedling establishment an experiment in a randomized complete block design base as a factorial was conducted to evaluate effects of drought stress (0.0, -0.2, -0.4, -0.8 and -1 MPa) on germination and seedling growth characteristics of wild oat seed production under different irrigation regime (100,80 and 60 percentage of water requirement of wheat from stem elongation stage to the end of growth season) in Shahrood Agriculture research center. According to the results, maternal irrigation regime, drought stress and interaction effects between them had significant effect on germination and seedling characteristics of wild oat. The results showed that germination characteristics were decreased significantly with decrease of water potential to -1 MPa. The highest rate and percentage of germination and radicle length in this water potential was related to irrigation regime of 60% water requirement and the least of plumule dry weight was related to irrigation regime of 60 and 80% water requirement. Length and dry weight of plumule decreased more than those of radicle under drought stress conditions and showed greater sensitivity to reduced water potential. Lower dry weight and green area was observed in seedling that germinated at water potential more than -0.4 MPa. The results showed that drought stress during the seed formation caused significant changes in response of wild oat germination under stress condition.
A. Abbasian; Gh.A. Asadi; R. Ghorbani
Volume 5, Issue 2 , January 2016, , Pages 215-222
Abstract
In order to evaluate the germination characteristics and cardinals temperatures in invasive plant of Centaurea balsamita, a laboratory experiment as a completely randomized design with four replications was conducted in Weed Research Laboratory, Faculty of Agriculture Ferdowsi University of Mashhad in ...
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In order to evaluate the germination characteristics and cardinals temperatures in invasive plant of Centaurea balsamita, a laboratory experiment as a completely randomized design with four replications was conducted in Weed Research Laboratory, Faculty of Agriculture Ferdowsi University of Mashhad in 2014. Treatments consisted of 8 constant temperatures (1, 5, 10, 15, 20, 25, 30, 35 and 40 oC). The characteristics such as percentage of seed germination, seedling vigour index, rate of seed germination, dry weight of radicle and plumule and plumule, radicle length were recorded. The seeds of Centaurea balsamita were monitored for variability in germination criteria based on two regression models namely Quadratic Polynomial Model and Intersected-Lines models. The highest germination percentage and germination rate was obtained in 20 0C. The highest root length, shoot length, root and shoot dry matter was obtained in 25 ° C. Based on the regression between germination rate and temperature in Centaurea balsamita, the cardinal temperatures (Tbase, Topt and Tmax) were (1.44 , 1.26), (22.8 , 19.8) and (38.4 , 38.2) 0C. The results showed that Quadratic Polynomial Model was estimated better than Intersected-Lines model in terms of cardinal temperature
Volume 2, Issue 1 , March 2013, , Pages 39-54
Abstract
In order to evaluate the effect of maize seed priming in germination and emergence stage in controlled condition, an experiment was conducted as factorial on the basis of completely randomized design with two maize hybrids (S.C.704 and Karaj 700) and six time of seeds dry back after 17 hours wetting ...
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In order to evaluate the effect of maize seed priming in germination and emergence stage in controlled condition, an experiment was conducted as factorial on the basis of completely randomized design with two maize hybrids (S.C.704 and Karaj 700) and six time of seeds dry back after 17 hours wetting (0,1.5,3,6,12 and 24 hours and control treatment (without priming)) with three replications. There were significant differences (Pandlt;%5) between two hybrids for most of the parameters, and germination and emergence of Karaj 700 was higher than S.C.704. Priming decreased mean germination time (MGT) of primed seeds to control and also mean germination rate (MGR) of seeds increased significantly. Seeds that 3 hours dried back had the highest MGR. Radicle and plumule length and radicle and plumule dry weight of primed seeds was higher than the control.Although priming had positive effects on characteristics such as decrease in MGT, increase in MGR, in length and dry weight of radicle and plumule, none of priming treatments had significant effects on grown plant characteristics in glasshouse.
