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Articles by R. Zarghami
Total Records ( 3 ) for R. Zarghami
  Y. Nicknejad , R. Zarghami , M. Nasiri , H. Pirdashti , D.B. Tari and H. Fallah
  An experiment was conducted at Iran Rice Research Institute-Deputy of Mazandaran (Amol) in 2007, to study the physiological and morphological indices of different rice varieties. The experiment was carried out with, Factorial experiment in randomized completely block design comprising four replications. Studied factors were limitation of source and sink in 4 treatments viz., (1) cut all of leaves except flag leaf, (2) cut flag leaves, (3) cut 1/3 end of panicle and (4) control. Variety in four treatment was as Tarom, Neda, Shafagh and Fajr. Completion of source and sink limitation treatments were carried out at 50% flowering stage. Results showed that the most CGR was related to Shafagh variety (25.18 g/m2/day) in 1650 GDD and the least CGR was produced in the Tarom variety (21.1 g/m2/day) in 1452 GDD. The most RGR was obtained in the Shafagh and the least RGR was obtained in the Neda variety at the 850 GDD. Completion source and sink limitation treatments on leaf area index showed that cut all leaves except flag leaves had least leaf area index also with cut all of leaves and flag leaves in all of varieties the RGR was decreased. Results of morphological characteristics measurement showed that highest plant height and least plant height were produced in the Tarom and Shafag varieties, respectively. Maximum leaves number in the Tarom variety was produced in the 1180 GDD. Also, the Neda variety with produced 24 tillers per plant had most tiller number. The Tarom variety with coefficient 81.25% had most conversion all tillers to fertile tiller percentage.
  A. Shirinzadeh , R. Zarghami , A.V. Azghandi , M.R. Shiri and M. Mirabdulbaghi
  In order to study the effect of water stress exerted to seeds of corn hybrids in their various stages of growth on their yield and determining their level of tolerance, a split block experiment based on completely randomized block design with 3 replications was conducted in Agriculture and Natural Resources Research Center of Moghan, Ultan, Parsabad, Ardabil province, Iran. The experimental factors included 4 irrigational regimes (normal irrigation and cease of irrigation in vegetative, flowering and seed filling stages) and 7 commercial corn hybrids. Drought tolerance indices including stress susceptibility index, tolerance index, mean production, geometric mean of production, stress tolerance index and harmonic average were estimated based on seeds yields of the genotypes studied under water stress and non-stress conditions. It was found that in addition to the significant correlation between each of indices and seed yield, there were also statistically significant correlations between these indices under stress and non-stress conditions. Furthermore, as stress tolerance index could separate the group A from other groups, it was selected as the most appropriate index for selection of stress tolerant genotypes. Therefore, only stress tolerance index and yields under stress and non-stress conditions were applied to design three-dimensional figures and observed that the genotypes SC647 and SC704 were the most tolerant cultivars.
  M. Mirabdulbaghi , R. Zarghami and A.V. Azghandi
  This research was carried out to study the effect of two propagating methods on rooting ability and propagation of Tanasgol, a natural plum-apricot hybrid (Prunus domestica-armenia) developed in Shahrood, Iran. The propagation methods were hardwood cuttings and in vitro culture of seeds, set up as two separate experiments based on Completely Randomized Designs (CRD) with three replications and 20 cuttings/seeds for each replicate. Hardwood cuttings were treated in IBA-containing solutions of various concentrations (2000, 2500, 3000 and 4000 ppm). For in vitro culture, seeds were isolated from ripen fruits, surface sterilized and cultured on MS medium supplemented with 500 mg L-1 adenine sulfate, 1.5 g L-1 activated charcoal, 2 mg L-1 BAP and various concentrations of NAA (0.5, 1.0, 1.5, 2.0 mg L-1). After 60 days, the percentage of in vitro rooted seedlings was recorded. The results showed that the concentration of 3000 ppm IBA induced 47% rooting on hardwood cuttings and was better than other treatments significantly. The highest in vitro seed germination and rooting successfully (60%) was obtained on MS supplemented with 1.0 mg L-1 NAA. Therefore, more rooted plants (up to 1.3 times) would be obtained using in vitro culture techniques compared with hardwood cuttings.
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