Mehran Sharafizad; Shahla Hashemi Fesharaki
Abstract
This study was carried out based on complete randomized design in four replications in order to assess germination and seedling vigor of barely seeds Cv. Goharan exposed to Zn-micronutrient element and different fungicides. Evaluated treatments on Barely seeds include six fungicide treatments Dividend ...
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This study was carried out based on complete randomized design in four replications in order to assess germination and seedling vigor of barely seeds Cv. Goharan exposed to Zn-micronutrient element and different fungicides. Evaluated treatments on Barely seeds include six fungicide treatments Dividend star (2 per 1000), Carboxin Thiram (2.5 per 1000), Raxil (0.5 per 1000), Lamardor (0.2 per 1000), Rovral-TS (2.5 per 1000) and non-fungicide, and three Zn-seed treatments, Zn-Kavin, Zn-Zagorat and non-Zn seed treatment. Barely seed germination was two percent lower than control compared with Zn-seed treatments. The lengths of radicle (12%), shoot (20%), and seedling (13%) after seeds treated with Zn-seed treatments along with Rovral-TS and Carboxin Thiram were more than the ones were recorded with liquid Dividend star. Other fungicides except liquid Dividend star showed similar response to control about seedling length vigor index. The highest rate germination (R50, 1.20) was belonging to Rovral-TS, Carboxin Thiram, and Raxil fungicides in combination with Zn-seed treatments, Moreover, the lowest time to reach maximum of germination (less than 2 days) was recorded in mentioned treatments. However, two fungicides of liquid Dividend star and liquid Lamardor had lower germination rate (1.01) than control (1.06 till 1.1), so these two fungicides usage with such condition was not suggested in this study. In conclusion, Rovral-TS and Carboxin Thiram along with Kavin and Zagorat Zn-seed treatments were suggested to improve germination and seedling vigor of barely indices.
Parisa Ahmadi; Mohammed Hossein Gharineh
Abstract
To evaluate different priming treatments under salinity stress conditions, an experiment was conducted in a factorial design based on completely randomized design with four replications in the Seed Technology Laboratory of the Department of Plant Production and Genetics Engineering at Agricultural Sciences ...
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To evaluate different priming treatments under salinity stress conditions, an experiment was conducted in a factorial design based on completely randomized design with four replications in the Seed Technology Laboratory of the Department of Plant Production and Genetics Engineering at Agricultural Sciences and Natural Resources University of Khuzestan in 2022. The first factor included different salinity levels (0, 50, 100, 150, and 200 mM), the second factor included priming treatments (control (no priming), gibberellic acid, and potassium nitrate), and the third factor included temperature (10 and 25 C). The results showed that at 25 C, germination completely stopped at salinity levels above 100 mM in all priming treatments (gibberellic acid, potassium nitrate, and no priming). However, at 10 C and a salinity level of 200 mM, 93% of the seeds were able to germinate under gibberellic acid and potassium nitrate priming conditions. The germination percentage of black cumin seeds at 25 C and a salinity level of 50 mM was 54% and 48% under gibberellic acid and potassium nitrate priming conditions, respectively, showing a significant difference compared to the control treatment (32%). Under gibberellic acid application at 25 C, the highest mean germination time (11 days) was observed. Overall, considering salinity stress and the cultivation of medicinal plants, the application of gibberellic acid and potassium nitrate is recommended to achieve optimal germination and subsequent establishment of black cumin seedlings.
Hamid Najafi; Mohammad Rafieiolhossaini; Parto Roshandel; Maryam Zeinali Borojeni
Abstract
This research was carried out to investigate the effect of different concentrations of three brown seaweeds on growth and activity of some antioxidant enzymes at different drought stress levels; as a factorial scheme in a completely randomized design with three replications. The first factor includes ...
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This research was carried out to investigate the effect of different concentrations of three brown seaweeds on growth and activity of some antioxidant enzymes at different drought stress levels; as a factorial scheme in a completely randomized design with three replications. The first factor includes control and seaweed extract, Ecklonia maxima, Ascophyllum nodosum, and Sargassum glaucescens each in 2 and 3 percent concentrations and the second factor included different levels of drought stress 0, -0.4 and -0.8 MPa. The effect of fertilizer was significant on all traits except of radicle fresh weight and the effect of drought stress and the interaction effect of fertilizer and drought stress was significant on all traits. The results of means comparison of the interaction effect showed that the Basfoliar algae treatment of 2% and zero drought level produced the highest amount of radicle fresh weight, the activity of seedling’s alpha-amylase and beta-amylase. Alga600 2% algae treatment at zero drought stress level had the highest percentage of germination, plumule and seedling fresh weight, the treatment without algae and zero drought stress level produced the highest radicle length, Alga600 3% treatment and zero drought level had maximum plumule and seedling length and Acadian 2% treatment and zero drought level had the highest dehydrogenase enzyme activity. In general, it can be concluded that drought stress reduces and the use of seaweed improves the seed growth and biochemical characteristics of Niger seed plant, especially under drought stress conditions.
Zeinab Tahamtan; Sasan Mohsenzadeh; Atena Eslami-Farouji
Abstract
Water scarcity in Iran’s ecosystem and the limited availability of endemic drought-resistant species highlight the significance of plants adapted to arid environments. Seed germination is one of the important stages in the plant’s life cycle, depends on ecological and physiological factors. ...
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Water scarcity in Iran’s ecosystem and the limited availability of endemic drought-resistant species highlight the significance of plants adapted to arid environments. Seed germination is one of the important stages in the plant’s life cycle, depends on ecological and physiological factors. The study aims to investigate the effect of ecological, environmental, and physiological factors of the maternal trees on the germination of Ziziphus spina-christi seeds from Fars and Bushehr provinces. Experiments were conducted under controlled conditions, including six different treatments. Cluster and Principal Coordinate Analysis (PCoA) were performed using Euclidean similarity coefficient in PAST software to examine the relationships between regions and key traits. The highest germination was in the treatment without pericarp and soaking in distilled water (48 hours). Alternatively, pigment comparison demonstrated the highest levels in the maternal leaves of Shiraz and Kangan. Maximum proline content was in Firouzabad leaves. The highest electrical conductivity was in Jam, while the maximum soil phosphorus and potassium were reported in Shiraz. The percentage of clay and silt was higher in Firouzabad, whereas the maximum percentage of sand was reported in Kangan. Cluster analysis categorized the regions into two distinct groups, aligning with PCoA results. In Detrended Correspondence Analysis, the most important factor for Shiraz was potassium, whereas silt percentage, carotenoids, and leaf area clustered Kangan and Dahrom. The results indicate that the ecological and physiological conditions of maternal trees directly affect seed germination, determining plant growth and adaptation, which can influence the cultivation of this tree in Fars and Bushehr provinces.
Ali Ebadi; Fatemeh Ahmadnia; Solmaz Feizpoor
Abstract
Developing new strategies such as using nanotechnology to control weeds is one of the ways to reduce the environment from improper use of chemical inputs. For this purpose, in 2024, a factorial experiment was conducted based on a completely randomized design with three replications on the germination ...
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Developing new strategies such as using nanotechnology to control weeds is one of the ways to reduce the environment from improper use of chemical inputs. For this purpose, in 2024, a factorial experiment was conducted based on a completely randomized design with three replications on the germination of Redroot pigweed (Amaranthus retroflexus) seeds. Experimental treatments include aqueous extract of Sunn hemp (in concentrations of 0, 10, 15, and 20 g/L-1) and TiO2 NPs synthesized with aqueous extract of Sunn hemp (TiO2 NPs synthesized without Sunn hemp extract (Control), TiO2 NPs synthesized with 10, 15, and 20 g/L-1 Sunn hemp aqueous extract). Green synthesis of TiO2 NPs with Sunn hemp compared to Sunn hemp aqueous extract at concentrations of 10 and 15 g/L-1 decreased germination by 30.56 and 43.01%. This study indicated that the TiO2 NPs synthesized with Sunn hemp extract caused a 1.20 and 12.63 % increase in lipid peroxidation and decreased catalase enzyme activity by 3.84% and 5.72% in concentrations of 10 and 15 g/L-1, compared to Sunn hemp aqueous extract. This experiment showed a strong inhibition of green synthesis of TiO2 NPs using Sunn hemp aqueous extract on germination and related components in Redroot pigweed seeds.
