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Showing 4 results for Movahhedi Dehnavi
Response of Safflower (Carthamus tinctorius) Seed Germination under Cadmium Nitrate Stress to Salicylic Acid Priming
Khadijeh Badpa, Mohsen Movahhedi Dehnavi, Alireza Yadavi,
Volume 2, Issue 2 ((Autumn & Winter) 2016)
Abstract

To evaluate the interaction of Cd and SA on seed germination of Safflower (Carthamus tinctorius L. cv. Soffe), this experiment was carried out as a factorial based on CRD with four replications in 2012, in Yasouj University seed lab. Factors included of four levels of seed priming with SA (0, 0.3, 0.6, and 0.9 mM) and eight levels of cadmium nitrate (0, 5, 10, 15, 20, 25, 30 and 35 mM). In all Cd treatments, SA 0.9 mM had maximum germination percentage (84% in 0 mM Cd) and rate (6.58 seed day-1 in 5 mM Cd), radical length (4.21 cm in 0 mM Cd) and stem (3.29 cm in 0 mM Cd), radical dry mater (2.25 mg in 0 mM Cd), shoot dry matter (0.94 mg in 0 mM Cd) and seed vigor index (6.30 in 0 mM Cd). Generally, seed priming with SA decreased the impact of Cd on seed germination and SA 0.9 mM was the best treatment.


Effect of Zinc and Boron Foliar Application on Maternal Plant and Seed Enrichment on Vigor and Germination Indices of Sesame (Sesamum indicum cv. Darab 1)
Samira Parsaei, Mohsen Movahhedi Dehnavi, Hamidreza Balouchi,
Volume 4, Issue 1 ((Spring and Summer) 2017)
Abstract
Micronutrients play a great role in the production of high quality seeds, especially in terms of germination. Therefore, providing seeds with sufficient amounts of these is an important consideration in seed production. The present study was conducted as two separate experiments in the Seed Laboratory of Yasouj University in 2015. In the first experiment, the sesame seeds (cv. Darab 1) obtained from a previous split plot experiment based on RCBD, consisting of three irrigation levels (after 75, 110 and 145 mm evaporation from class A pan) and four foliar applications comprising water, zinc sulfate, boric acid and mixture of zinc sulfate and boric acid, were investigated in germination experiments in the minimum temperature (i.e., 15°C). The second experiment was a factorial based on RCD with three replications. The first factor in the eight levels included seeds soaked in water, ZnSo4, H3Bo3 and ZnSo4 + H3Bo3 and seeds with high contents of Zn (159 m Kg-1), B (15.3 m Kg-1) and Zn (139.5 m Kg-1)+ B (14 m Kg-1) and dry see as the control. The second factor was accelerated aging periods at three levels (0, 2 and 4 days) at 45°c and RH = 100%. The results showed that with a delay in irrigation time, compared with water foliar application, foliar application of micronutrients (Zn, B, Zn+B), and significantly increased germination traits. The results also suggested that, compared with seeds soaked in nutrients, seeds with high Zn and B contents significantly increased germination indices and antioxidant (catalase and peroxidase) activities, especially under accelerated seed aging.

Highlights:
  1.  The role of maternal sesame plant (cv. Darab 1) foliar application by zinc and boron elements in germination, vigour and storage capability of seeds was studied.
  2. The effect of seeds soaked in solutions enriched with zinc and boron elements on germination, vigour and storage capability of seeds was examined.

The Effect of Chilling and Gibberellic Acid on the elimination of Schrophularia striata Seed Dormancy in Different Habitats of Ilam Province
Kamran Alimardani, Amin Salehi, Mohsen Movahhedi Dehnavi, Ali Moradi,
Volume 8, Issue 2 ((Autumn & Winter) 2022)
Abstract
Extended Abstract
Introduction: Schrophularia striata is one of the medicinal plants of the Scrophulariaceae family and contains phenolic compounds. Locals have traditionally used this herbal medicine to treat infections caused by wounds, gastrointestinal diseases, and eye diseases. Due to excessive consumption by indigenous people and climate change, especially increasing temperature, the cold required to eliminate seed dormancy is not presently available and its germination and growth has decreased. Therefore, this plant is at the risk of extinction. Since this plant is propagated in natural habitats through seed and due to deep seed dormancy, evaluation of different seed dormancy methods is necessary for conservation and domestication of this species. In this study, suitable methods to eliminate seed dormancy of this plant using chilling and gibberellic acid treatments were studied on the seeds collected from different habitats of Ilam province.
Materials and Methods: To investigate the effect of using chilling and gibberellic acid on Schrophularia striata dormancy, a split plot factorial experiment based on completely randomized design with four replications was conducted at the seed laboratory of Yasouj University in 2018. The first factor included the duration of moist chilling period (0, 4, 8, 12 and 16 weeks), the second factor included gibberellic acid (0, 300 and 600 mg/L) and the third factor included five habitats (Ilam, Ivan, Mehran, Abadan and Dehloran).
Results: The results showed that the 16-week Chilling and zero gibberellic acid treatments had the highest germination percentage in all habitats, as the percentage of germination in Mehran, Ivan, Ilam, Abadan and Dehloran habitats was 66, 50, 36, 30 and 25%, respectively. Also, the highest germination rate was observed in all habitats at 16 weeks chilling and zero mg/L gibberellic acid concentration. The highest germination uniformity was obtained at 16 and 12 weeks of chilling.
Conclusions: Chilling period duration was effective on germination percentage and rate and with increasing chilling period, germination percentage and rate increased. This indicates that the seeds studied had some degree of physiological dormancy, and the seed of higher altitude habitats required longer chilling periods than those of the lower ones for germination. Also, according to the results of this experiment, chilling periods above 16 weeks should be used to increase germination percentage.

Highlights:
1- Chilling period duration in the presence of gibberellic acid was the most important factor for the elimination of Schrophularia striata seed Dormancy and increased germination.
2- With increasing altitude and in the same chilling period duration, habitats with lower altitude had higher germination percentage and rate

Improving the Vigor of Sweet Corn (Zea mays var. Saccharata Basin R) Seedlings through Seed Priming with Ellagic Acid, Gibberellin, and Potassium Nitrate
Kamran Gharehbeygi Tavabea, Hamidreza Balouchi, Mohsen Movahhedi Dehnavi, Ali Moradi, Fatemeh Ebrahimi,
Volume 11, Issue 2 ((Autumn & Winter) 2025)
Abstract
Extended Abstract
Introduction: Poor seedling vigor is one of the major challenges in agriculture, as it reduces seed germination capacity and seedling establishment, directly impacting plant establishment and yield. The use of seed priming methods with chemicals and growth regulators can serve as an effective strategy to enhance seedling vigor and improve biochemical traits and seed germination. In this study, the enhancement of sweet corn seedling vigor through priming with ellagic acid, gibberellin, and potassium nitrate was investigated under accelerated aging conditions.
Materials and Methods: This experiment was conducted in the Seed Technology Laboratory of the Faculty of Agriculture at Yasouj University in 2024, using a factorial design in a completely randomized design with two factors. The first factor was accelerated seed aging at two levels (aged and non-aged), and the second factor was seed priming at eight levels (no prime, hydropriming, ellagic acid at two concentrations (25 and 100 mg/L), gibberellin at two concentrations (50 and 150 mg/L), and potassium nitrate at two concentrations (15 and 60 mg/L)). Biochemical traits and seed germination characteristics were measured.
Results: The findings of this study revealed that seed deterioration significantly reduced germination characteristics, including germination percentage and rate, shoot length, root length and seedling vigor index (length and weight). Additionally, biochemical indices such as soluble sugar content and alpha-amylase enzyme activity were negatively affected by aging. On the other hand, seed deterioration increased proline content, malondialdehyde levels, and peroxidase enzyme activity, indicating heightened oxidative stress under aging conditions. Priming of deterioration seeds with ellagic acid, gibberellin, and potassium nitrate positively influenced germination characteristics and biochemical indices. Specifically, concentrations of 100 mg/L ellagic acid, 150 mg/L gibberellin, and 15 mg/L potassium nitrate were the most effective pretreatments.
Conclusion: The results of this research demonstrated that pretreatment of deterioration Basin sweet corn seeds with ellagic acid, gibberellin, and potassium nitrate significantly improved germination and biochemical indices. These treatments mitigated the negative effects of seed aging, enhancing seedling vigor and establishment. Therefore, these priming can be recommended as effective methods to improve the quality of Basin sweet corn seeds under various agricultural conditions.

Highlights:
  1. Seed deterioration leads to an increase in biochemical indicators such as seed proline content, peroxidase enzyme activity, and seed malondialdehyde content.
  2. The vigor of Basin sweet corn seeds is improved through pretreatment with gibberellin and ellagic acid.
  3. The effect of priming before and after artificial deterioration on germination and seed vigor of sweet corn cultivar Basin was compared and investigated.

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