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    Effect of Seed Priming With Salicylic Acid on Germinability and Seedling Vigor Fenugreek (Trigonella Foenum-Graecum)
    (2018) Moghaddam, Sina Sıavash; Rahımı, Amir; Noorhosseını, Seyyed Ali; Heydarzadeh, Saeid; Mırzapour, Mohsen
    In orther to the effects of seed priming with salicylic acid (SA) on germinability and seedling vigor of fenugreek was used three salicylic priming treatments (control, 1700 and 2800 ?M) and accelerated aging test for 24 and 48 hours including control with no aging at 95% relative humidity at at 45°C. It was found that aging for 48 hours without priming resulted in significant loss of mean germination percentage, seedling length vigor, seedling weight vigor, germination speed, coefficient of germination speed, mean daily germination, coefficient of germination uniformity, germination vigor, maximum mean daily germination, and germination value. But, when the aged seeds were primed with 2800 ?M SA, it significantly improved these parameters sothat germination percentage reached to 100% from 41%. In contrast to these germination speed were observed in unprimed aged seeds for 48 hours. Moreover, priming with 2800 ?M SA of aged seeds for 48 hours increased their seedling tissue water percentage to 94.48%. Accelerated aging for 48 hours reduced seedling length and weight significantly. The highest seedling length, plumule dry weight and seedling dry weight were observed in seeds treated with 2800 ?M SA
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    Evaluation of Antioxidant Activity of Garden Thyme (Thymus vulgaris L.) Affected by Humic Acid Under Urmia-Iran Condition
    (2022) Mırzapour, Mohsen; Rahımı, Amir; Heydarzadeh, Saeid
    The trial aimed to study the effects of different levels of humic acid on the antioxidant activity of garden thyme. The study was conducted at the experimental fields of the Agronomy Department, Faculty of Agriculture, Urmia University, West Azerbaijan, Iran, and used randomized complete block design with four replications. Three different humic acid doses; 200 kg ha?1, 400 kg ha?1 and 600 kg ha?1, and control with no humic acid were the treatments. Total phenolic content, total flavonoid content, DPPH (1,1-diphenyl 2-picryl hydroxyl) radical scavenging activity, nitric oxide radical scavenging activity, and chain-breaking activity were determined. According to the results, the effect of different levels of humic acid in the first harvest on total flavonoid content and nitric oxide radical scavenging was significant whereas, in the second harvest, total phenols content, total flavonoids content, DPPH radical scavenging activity, and chain-breaking activity were significant. The maximum total phenolic content, and nitric oxide radical scavenging activity were obtained in the control treatment. The highest total flavonoid content, DPPH radical scavenging activity, and chain-breaking activity were obtained in the application of 400 kg ha?1 and 600 kg ha?1 humic acid.
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    Öğe
    Impact of Different Fertilizer Sources under Supplemental Irrigation and Rainfed Conditions on Eco-Physiological Responses and Yield Characteristics of Dragon's Head (Lallemantia iberica)
    (Mdpi, 2023) Heydarzadeh, Saeid; Arena, Carmen; Vitale, Ermenegilda; Rahimi, Amir; Mirzapour, Mohsen; Nasar, Jamal; Kisaka, Oscar
    The effects of the irrigation regime and different fertilizer sources on the eco-physiological responses and yield characteristics of dragon's head were explored in a factorial experiment based on a randomized complete block design with 12 treatments and 3 replications in the 2019 growing season. The treatments included six different fertilizer sources (animal manure, vermicompost, poultry manure, biofertilizer, chemical fertilizer, and control) and two irrigation regimes (rainfed and supplemental irrigation). The results indicated the positive effects of supplementary irrigation and the application of vermicompost, poultry manure, and animal manure by increasing the absorption of nutrients (phosphorus and potassium) and improving relative water contents, chlorophyll and carotenoid contents, and the fixed oil percentage of dragon's head. The activities of catalase, ascorbate peroxidase, and superoxide dismutase decreased in the rainfed plants, whereas organic fertilizer application increased the antioxidant enzyme activity. The highest grain yield (721 kg ha(-1)), biological yield (5858 kg ha(-1)), total flavonoids (1.47 mg g(-1) DW), total phenol (27.90 mg g(-1) DW), fixed oil yield (200.17 kg ha(-1)), and essential oil yield (1.18 kg ha(-1)) were noted in plants that were treated with vermicompost under supplemental irrigation. Therefore, it is recommended that organic fertilizers such as vermicompost and poultry manure be used to substitute chemical fertilizers. These practices can help popularize organic crops using rainfed and supplementary irrigation.