Bahman Ahmadvand; Seyed Amir Moosavi; Seyed Ata Siadat; Reza Tavakkol Afshari; Ali GHATEI
Abstract
The aim of this study was to investigate the relationship between the morphometric characteristics of the seeds of different buckwheat (Fagopyrum esculentum Möench) lots obtained from different planting dates (29th Aug: 1, 13th Sep: 2, 28th Sep: 3 and 12th Oc: 4) with its seed germination quality ...
Read More
The aim of this study was to investigate the relationship between the morphometric characteristics of the seeds of different buckwheat (Fagopyrum esculentum Möench) lots obtained from different planting dates (29th Aug: 1, 13th Sep: 2, 28th Sep: 3 and 12th Oc: 4) with its seed germination quality under different temperature treatments. For each of seed lot, four separate experiments with 11 temperature levels including 4, 7, 10, 15, 20, 25, 30, 35, 37, 40 and 45 °C were carried out in a completely randomized design with 3 replications in seed science and technology laboratory of Agricultural Sciences and Natural Resources of Khuzestan University in 2022. The results of analysis of variance demonstrated that temperature has a significant effect at the level of 1% on germination rate index. According to the model parameters and of course the standard error, the segmented model was chosen as the best model. Based on this, according to the superior (segmented) model, the base, optimal and ceiling temperatures for lot 1 are 4.82, 34.24 and 44.82 degrees Celsius respectively, in lot 2 they are 4.18, 33.82 and 46 respectively. 44.0 degrees Celsius, in lot 3 it was estimated 5, 34.64 and 43.87 degrees Celsius respectively and in lot 4 it was estimated 5, 31.69 and 44.27 degrees Celsius respectively. Identify the cardinal temperatures can be of great help in managing the optimal sowing date of crops.
Amin Haghighi; seyed ata Siadat; Ali Moshatati; Seyed Amir Moosavi
Abstract
In order to study the effect of auxin hormone priming on seed germination indices and seedling growth of triticale under salt stress, an experiment was carried out as a factorial experiment in a completely randomized design with four replications in seed science and technology laboratory of plant production ...
Read More
In order to study the effect of auxin hormone priming on seed germination indices and seedling growth of triticale under salt stress, an experiment was carried out as a factorial experiment in a completely randomized design with four replications in seed science and technology laboratory of plant production and genetics engineering department of Agriculture Sciences and Natural Resources University of Khuzestan in 2018. Experimental factors were auxin hormone priming (control (no priming), 5 μM auxin in 3 hours, 10 μM auxin in 3 hours, 20 μM auxin in 3 hours, 40 μM auxin in 3 hours, 5 μM auxin in 6 hours, 10 μM auxin in 6 hours, 20 μM auxin in 6 hours and 40 μM auxin in 6 hours) and different salinity levels (include 0, 4, 8, 12, 16 and 20 dS/m). The analysis of variance showed that the effect of priming, salinity stress and the interaction effect of them were significant on all measured traits (except germination percetage) in 1 percent probability level. The comparison of means showed that salinity stress decreased germination traits but hormone priming reduced the negative effect of salinity stress and improved different germination indices. Also, the best concentration of Auxin hormone priming was at 20 μM for 3 hours.
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 ...
Read More
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.
seyed ata Siadat; Seyed Amir Moosavi; ghasem parmoon; Samaneh Kiani
Abstract
To study the relationship between seed size and aging on cardinal temperatures of canola cv. Hyola 50, seed germination an experiment was conducted based on a randomized complete design with three replications. Seeds were classified in to four groups based on their diameter (1.4, 1.8, 2 and 2.2 mm) and ...
Read More
To study the relationship between seed size and aging on cardinal temperatures of canola cv. Hyola 50, seed germination an experiment was conducted based on a randomized complete design with three replications. Seeds were classified in to four groups based on their diameter (1.4, 1.8, 2 and 2.2 mm) and considered as the first experimental factor. The Second factor was various durations of accelerated aging treatment (0, 24, 48, 72, 96 and 120 hours (40oC, RH=100%) and the third factor was nine constant temperatures in which seeds were germinated (0, 5, 10, 15, 20, 25, 30, 35 and 40 ˚C). Cardinal temperatures were quantified for germination fraction of 50% using four nonlinear model: beta, beta modify, dent-like and segmented. The result indicted beta model better described responses germination rate to temperature compared with others models and accelerated aging and sizes did not affect the change model base temperature was about 1.15 OC in sizes 1.4 mm and increase in size to 2.2 mm deceased to 0.11 OC. The optimal temperature range was about 21.37 to 21.58 OC and the maximum temperature was 40.2 to 40.8 OC. it was also found that different seed sizes did not have a significant difference in terms of thermal time and deterioration increased the basal germination temperature and thermal time coefficient and reduced the optimal and maximum temperature, that it can show necessity delay in planting date in cold areas or early planting in tropical areas in these types of seeds.
hadis hasanvand; ghasem parmoon; Seyed Amir Moosavi; seyed ata Siadat
Abstract
This experiment was conducted at seed technology laboratory of Agricultural Sciences and Natural Resources University of Khuzestan, in 2018 with the to evaluate the effects of seed priming on cardinal temperatures and thermal time requirements of borage seed germination. The factorial experiment was ...
Read More
This experiment was conducted at seed technology laboratory of Agricultural Sciences and Natural Resources University of Khuzestan, in 2018 with the to evaluate the effects of seed priming on cardinal temperatures and thermal time requirements of borage seed germination. The factorial experiment was arranged based on the randomized complete block design with three replications. Treatments were gibberellic acid (0 (distilled water as control), 100, 200, 400 mg/L-1), priming durations (6 and 12 hour) and seven levels of germination temperatures (5, 10, 15, 20, 25, 30 and 35 oC). Beta model, beta modified, dent-like and segmented were used to determine cardinal temperatures. Results showed that seed germination significantly increased at both priming durations of 6 and 12 hours with increasing of temperature and gibberellic acid concentrations. The highest seed germination was observed at 200 mg/L-1gibberellic acid and 15 oC. Increase of gibberellic acid concentrations resulted higher thermal time requirements to complete 50% of germination in seed population. From the results, the beta model provided the best fit to evaluate cardinal temperatures of borage seeds. It is therefore, suggested that the base, optimum and celling temperatures of borage seeds are 0.51, 21.5 and 35.1 oC and influenced by application 200 mg/L-1GA to 0.33, 23.5 and 35.8 oC.
Miad Haji Mahmoodi; Abdolmahdi Bakhshande; Seyed Amir Moosavi; seyed ata Siadat
Abstract
Aging and salinity stress are main challenges towards of producing a healthy seedling. This research was conducted to investigate the effects of seed aging on the seed germination properties of Wild mustard under salinity stress condition. Experimental treatments were five levels of seed aging 0, 24, ...
Read More
Aging and salinity stress are main challenges towards of producing a healthy seedling. This research was conducted to investigate the effects of seed aging on the seed germination properties of Wild mustard under salinity stress condition. Experimental treatments were five levels of seed aging 0, 24, 48, 72 and 96 h and different levels of salinity stress 0, 100, 200, 300, 400 and 500 mmol. Seed germination, germination rate and seed vigor were declined at high salinity concentrations. Catalase activity and total seed protein content were decrease due to the aging. Seed protein content (1.4 mg/g fw) declined about 92% and reach to 0.1 mg/g fw after 96h of aging. Catalase activity was decrease due to aging while in contrast, peroxidase activity was higher from 0.04 to 0.11 u/ mg protein after 96 h of aging. It was observed that all fatty acids of wild mustard seed oil were changed at higher aging durations. Behenic acid (C22:0) and Erusic acid (C22:1) were 0.656 and 38.543% in noaged seeds and they increased to 0.751 and 40.186%, respectively.
Samaneh Kiani; Ghasem Parmoon; Seyed Amir Moosavi; seyed ata Siadat
Abstract
In order to quantify the seed germination responses of Fennel ecotypes including Esfahan, Hamadan and Booshehr to osmotic stress with concentrations of (0, -0.1, -0.2, -0.3, -0.4 and -0.5 MPa) a factorial experiment was conducted based on the completely randomized design with four replications. Experimental ...
Read More
In order to quantify the seed germination responses of Fennel ecotypes including Esfahan, Hamadan and Booshehr to osmotic stress with concentrations of (0, -0.1, -0.2, -0.3, -0.4 and -0.5 MPa) a factorial experiment was conducted based on the completely randomized design with four replications. Experimental data were subjected to analysis with various statistical distributions to provide more reliable and robust explorations. RSME value of hydrotime model showed that data were well fitted for seed germination of Booshehr. The normal and Gumbel distributions were the best and the worst model to estimate hydrotime model parameters. It was also cleared that among statistical distributions fitted on hydrotime model, the highest base water potential was obtained from Normal distribution -0.41 MPa. For Esfahan ecotype, hydrotime constant was estimated about 89 MPa/hour using Gumbel distribution. There was significant variation in location parameters of various statistical distributions and it has a range of -19.44 (Weibull) to -0.57 (Normal Distributions).
Zeinab Savaedy; Abdolmahdi Bakhshandeh; seyed ata Siadat; Amin Lotfi Jalal Abadi; Seyed Amir Moosavi
Abstract
In order to study the effects of storage temperature and humidity on seed germination properties and seedling growth of (Nigella sativa L.), a factorial experiment was conducted at the seed technology laboratory of Agricultural Sciences and Natural Resources University of Khuzestan based on the randomized ...
Read More
In order to study the effects of storage temperature and humidity on seed germination properties and seedling growth of (Nigella sativa L.), a factorial experiment was conducted at the seed technology laboratory of Agricultural Sciences and Natural Resources University of Khuzestan based on the randomized block design with four replications. Experimental treatments were different levels of relative humidity during storage (33, 75 and 100%), storage temperatures (30, 35, 40 and 45 oC) and storage durations (24, 48, 72 and 96 hour) and control. Results showed that increase of storage temperature and relative humidity led to lower seed germination percentage and germination rate, reduction in the root and shoot length and seedling vigor indices, while mean germination time and electrical conductivity increased. Among experimental treatments, the severe deterioration was observed at 100% relative humidity and 45 oC with the durations of 96 hour and at the medium deterioration treatments, of Nigella seeds were resealed from primary dormancy and seed germination was increased, accordingly. Fitted linear regression models by experimental treatments vs germination indices and seedling growth showed that except mean germination time of seed germination, all the traits exhibited linear relationship with three independent variables studied in this experiment
