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Articles by F. Rejali
Total Records ( 4 ) for F. Rejali
  M. Mirzakhani , M.R. Ardakani , A. Aeene Band , F. Rejali and A.H. Shirani Rad
  Problem statement: In order to evaluate the effects of co-inoculation of Azotobacter and Mycorrhiza with nitrogen and phosphorus levels on yield and yield components of spring safflower, this study was carried out in the experimental field of Farahan University in Markazi province- Iran in 2006. Approach: A factorial experiment in the form of complete randomized block design with three replications has been used. Inoculation of Azotobacter (without and with inoculation by Azotobacter chroococum) and Mycorrhiza (without and with inoculation by Glomus intraradices) under different levels of nitrogen and phosphorus levels [F0 = N0+P0(kg ha-1), F1 = N50+P25(kg ha-1), F2 = N100+P50(kg ha-1) and F3 = N150+P75(kg ha-1)] on spring safflower (Carthamus tinctorius L.-cv. IL-111) have been studied. Results: In this study some characteristics such as: Harvest index, hectolitre weight, root dry weight, seed yield, mycorrhizal root colonization, number of days to maturity were assessed. Results indicated that treatment (A1M1F2) with average grain yield 1239 (kg ha-1) and treatment (A0M1F0) with average grain yield 723.7 (kg ha-1) were significantly higher than other treatments. Seed inoculation at the planting date with Azotobacter and Mycorrhiza caused increasing grain yield about 6.13% in compare with control treatment. Conclusion: Seed yield and yield components of safflower have been affected significantly by the inoculation with Azotobacter and Mycorrhiza, because these biofertilizers can fix atmospheric nitrogen and increase phosphorus availability in soil and enhanced absorb elements by safflower.
  H. Soleimanzadeh , D. Habibi , M. Ardakani , F. Paknejad and F. Rejali
  Problem statement: Drought stress as a major adverse factor can lower leaf water potential, leading to reduced turgor and some other responses and ultimately lower crop productivity in arid and semi arid zones. Sunflower is one of the main oil seed crops in Iran, where drought stress is the most limiting factor. Drought stress tolerance requires the activation of complex metabolic activities including antioxidative pathways, especially Activated Oxygen Species (AOS) and scavenging systems within the cells which can contribute to continued growth under drought stress. Approach: To evaluate the effect of limited irrigation systems and potassium fertilizer on grain yield, antioxidant enzymes and lipid peroxidation biomarker (MDA), the crop was sown in the Research Farm of College of Agriculture, Islamic Azad University, Karaj Branch in 2009. The experimental treatments were arranged as split plots based on a Randomized Complete Block Design with three replications. The main plots were allocated to three different irrigation regimes. The irrigation regimes comprised of: Full Irrigation (IR1), Moderate drought stress (IR5) and Severe drought stress (IR2). The subplots were allocated to four potassium chemical fertilizer (Potassium nitrate) consisting of K1 = 25, K2 = 50, K3 = 75 and K4 = 100% recommended. Results: Plants under drought stress and potassium levels showed a significant increase and decrease, respectively, in SOD, CAT and GPX activity and MDA in compared to control plants. In this context, plants with higher levels of potassium showed higher resistance to drought stress conditions and higher yield and dry matter allocation to grain filling process i.e. harvest index. Results of this study suggested that drought stress leads to production of oxygen radicals, which results in increased lipid peroxidation (MDA biomarker) and oxidative stress in the plant. Conclusion: The scavenging of AOS by the scavenging system especially by SOD, CAT and GPX was done well and damage to membranes or MDA was controlled at higher levels of potassium.
  M.R. Ardakani , S. Teimuri , M. Rezvani , H. Fathollahi , A. Khorasani , F. Rejali , A. Raza and F. Zafarian
  This study designed to investigate more precise of mycorrhizal symbiosis in order to increasing mineral absorption by plant root system. Three pot experiments, radioactive with 32P, non-radioactive and a trial with selected strain (from first and second trials) with heavy metals (Cd, Co and Pb) contaminated soil were set up for evaluation the efficacy of four mycorrhizae strains including Glomus mosseae, G. etanicatum, G. intraradices, mixed strains (combination of G. mosseae, Gigarpora hartiga and G. fasciculatum) in order to investigate the uptake, translocation and distribution of 32P, P and also dry matter in barely in a glass house. Radioactive phosphorus (32P) was used in this study. Results revealed that G. mosseae had the highest amount of P uptake in comparison with other strains. It indicates that differences exist among mycorrhizae strains towards 32P uptake and its transportation to shoot. Increased strain count of G. mosseae was found in contaminated pots in trial with contaminated soil along with higher P concentration in root and shoot than non-inoculated plant roots.
  S. Samarbakhsh , F. Rejali , M.R. Ardakani , F. Pak Nejad and Mohammad Miransari
  With respect to the significance of the combined effects of fungicides application and Arbuscular Mycorrhizal fungi on the growth and yield of different crop plants such as corn (Zea mays L.) a field experiment was conducted. The objectives were to determine: (1) the combined effects of different fungicides and different arbuscular mycorrhiza (AM) species on the growth and yield of corn and (2) the efficiency of different AM species in symbiosis with corn plants, treated by different fungicides, under field conditions. Four AM treatments including control (M0), Glomus mosseae (M1), G. etunicatum (M2) and G. intraradices (M3) and four fungicide treatments including control (F0), benomyl (F1), vitavax (F2) and captan (F3) were tested in a factorial fashion on the basis of a completely randomized block design in three replicates in 2006. Different species of AM significantly affected corn growth and yield when subjected to different fungicides treatments. G. mosseae and corn plants established the most efficient symbiosis. In addition, fungicide benomyl had the least unfavorable effects on the colonization of corn roots by AM species. Determination of the appropriate rates of fungicides for treating seeds to alleviate the unfavorable effects of fungicides on plant growth, especially when in symbiosis with AM species, is of great significance.
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