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Articles by Mostafa Heidari
Total Records ( 4 ) for Mostafa Heidari
  Mostafa Heidari
  Seedling of two sorghum genotypes (Payam and Sistan) and four wheat genotypes (Bolani, Hirman, Star and Toss) were grown in Hoagland nutrient solution containing 0, 100 and 200 mM NaCl in controlled environment. Antioxidant activities like catalase (CAT), ascobrate peroxidase (APX) and guaiacol peroxidase (GPX) and osmolyte concentrations, proline and soluble carbohydrates were determined in the leaves 20 days after induction of salinity stress. Results showed that the activity of APX, GPX and CAT increased in both sorghum genotypes. Wheat genotypes showed significant differences during the experimental period. By increasing NaCl levels from 0 to 200 mM the activity of APX and GPX decreased, but the activity of CAT increased in all wheat genotypes. At the 100 mM NaCl, the CAT activity in wheat genotypes was higher compared with that in 200 mM NaCl. The increase in salinity stress increased total soluble carbohydrates and proline both in wheat and sorghum genotypes. Results in this study showed sorghum genotype displayed better osmotic adjustment and antioxidant compounds under salt stress and the efficiency of Sistan was better than Payam. Contrarily in wheat, osmotic adjustment (carbohydrate and proline accumulation) was much more effective than antioxidant enzyme activity.
  Mostafa Heidari
  A laboratorial study was carried out to investigate the effect of NaCl on seed germination, seedling growth, proline concentration and deoxyribonuclease (DNase I1) in canola. Five canola genotypes (Hyola308, Hyola401, Hyola60, Optlon50 and RGS003), were grown in petri dishes containing S1 = 0, S2 = 100, S3 = 200 and S4 = 300 mM NaCl in controlled environment. Results indicated that increased salinity caused a significant reduction in germination. Increase salt concentration also affected the early seedling growth and proline concentration in root and shoot tissues. Among the genotypes, Hyola60 appeared to be more tolerant at germination stage and accumulate the highest proline in the root and shoot as a result of salt stress. Among the genotypes, RGS003 had the highest the activity of DNase II in all of salinity treatments but more sensitive at 300 mM NaCl in germination stage then others.
  Yaser Esmailiyan , Mostafa Heidari and Ahmad Ghanbari
  In order to study effects of wastewater with two kind of fertilizers (manure and chemical fertilizer) on grain yield and yield components in corn (KoSc 704) a field experimental was conducted at the university of Zabol in Iran during 2007 growing season. The experiment was conducted as split block design with three replications. The treatments were comprised of two levels of irrigation water (W1 = well water and W2 = wasetewater) in main plot and five levels of fertilizer (F1 = control, F2 = manure: 30 ton ha1, F3 = manure: 15 ton ha1, F4 = NPK: 350, 200 and 100 kg ha1 and F5 = NPK: 175, 100 and 50 kg ha1) in sub plot. Results showed irrigation with wastewater significantly increased grain yield of corn than usual water. Also, wastewater had positive significantly influence on grain yield and all yield components, but the most effective of wastewater on yield components was on the 1000-seed weight. Among the fertilizer, F4 in all situations had the most effective on the grain yield and yield components and increased them.
  Mostafa Heidari and Fatmeh Mesri
  In order to study effects of different salinity levels on antioxidant enzyme activities, catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) associated with compatible solutes, proline and carbohydrate and mineral nutrient content in shoots, sodium and potassium, in three wheat cultivars an experiment was conducted as completely randomized 3x4 factorial design with three replicates in a greenhouse. Three wheat cultivars (Pishtaz, Kavir and Hamon), that differ in their salt tolerances, were grown in four different salinity levels (S0 = control, S1 = 100, S2 = 200 and S3 = 300 mM NaCl). Twenty days after wheat cultivars subjected to salt stress, data showed salinity stress induced increase in the antioxidant enzyme activities. Among the cultivars, salinity stress decreased leaf-APX but increased the activities of leaf-GPX in Pishtaz cultivar. Our results showed a positive correlation between praline accumulation and Leaf-APX (r2 = 0.56), Leaf-GPX (r2 = 0.63) and Leaf-CAT (r2 = 0.73). In these cultivars, in their shoots Na+ showed an increase in concentration with salinity that approximately matches a decrease in K+ concentration. It seems that Na+ concentrations in the shoot may have had a more significant effect on plant antioxidant enzyme activities and compatible solutes such as proline and carbohydrates. These results indicated which in wheat under salinity stress antioxidant enzymes and compatible solutes help to plant adaptation. In this study we found a positive correlation between Na+ concentration in the shoots and the antioxidant enzyme activities and compatible solutes in the leaves.
 
 
 
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