Babak Gholami; Faride Noroozi shahri; Farzad Mondani; Saeid Jalali honarmand; Mohsen Saeidi
Abstract
In order to evaluating effect of smoke-water and urea fertilizer on some growth indices, grain yield and yield components of wheat, a field experiment was conducted as a split plot based on Randomized Complete Block Design with three replications. The experiment was conducted during the season of 2015-2016 ...
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In order to evaluating effect of smoke-water and urea fertilizer on some growth indices, grain yield and yield components of wheat, a field experiment was conducted as a split plot based on Randomized Complete Block Design with three replications. The experiment was conducted during the season of 2015-2016 at Razi University Research Station, Iran. The experimental treatments were different levels of urea fertilizer application (included 90, 180, 300 and 360 kg ha-1) as main plot and leaf foliar application with different concentrations of smoke-water (included 0, 0.001%, 0.01%, 0.1% and 1% v/v) as sub plot. The results showed that smoke-water significantly improved all evaluated traits and increased wheat grain yield compared to control treatment in all urea fertilizer levels. The highest grain yield (922 g m-2) was obtained in application of 350 kg ha-1 urea and smoke-water at concentration of 1% v/v and the lowest grain yield (339 g m-2) was related to application 90 kg ha-1 urea and foliar with distilled water. The grain yield improved 15.22%, 11.36%, 7.18% and 7.67% by application of 90, 180, 300 and 360 urea kg ha-1 respectively, in smoke-water 1% concentration compared to the control treatment. It seems that smoke-water via improve increasing nitrogen efficiency could increase growth indices and grain yield of wheat.
Omid Sadeghipour
Abstract
In order to investigate the role of methyl jasmonate on salinity tolerance of cowpea, a factorial pot experiment was conducted in the basis of completely randomized design with three replications in the Rey region in 2015. Treatments included three levels of seed soaking in methyl jasmonate solution ...
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In order to investigate the role of methyl jasmonate on salinity tolerance of cowpea, a factorial pot experiment was conducted in the basis of completely randomized design with three replications in the Rey region in 2015. Treatments included three levels of seed soaking in methyl jasmonate solution (0, 25 and 50 µM) for 20 hours and three levels of salinity (0, 50 and 100 mM NaCl). The results showed that by increasing salinity levels, lipids peroxidation, antioxidant enzymes activity (superoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase) and Cl- concentration in the leaves increased, while the concentration of N, Ca2+ and Mg2+ decreased as well as K+/Na+ ratio. These changes eventually led to decreasing seed yield. Seed treatment with methyl jasmonate had not significantly effect on any measured traits under normal conditions, however this treatment (especially 50 µM) under salinity stress conditions caused further activity of antioxidant enzymes, declining lipids peroxidation, reducing the concentration of Cl- in the leaves, increasing the concentration of N, Ca2+ and Mg2+ as well as K+/Na+ ratio, and finally improved seed yield. These findings suggest that methyl jasmonate plays a pivotal role in inducing salinity tolerance of cowpea plants via enhancing antioxidant enzymes activity and altering nutrients composition.
Maryam Tatari; Seyed Asghar Mousavi
Abstract
According to problems caused by application of non-uniform seedling rootstocks in stone fruit treesorchards, the use of uniform and consistent rootstocks with these trees is essential. For determination ofthe best culture medium, explants of apical and lateral buds of Tetra, Nemaguard and GF677 rootstockswere ...
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According to problems caused by application of non-uniform seedling rootstocks in stone fruit treesorchards, the use of uniform and consistent rootstocks with these trees is essential. For determination ofthe best culture medium, explants of apical and lateral buds of Tetra, Nemaguard and GF677 rootstockswere prepared. Explants were placed in modified MS, WPM and Knop media each containing 0.6 mg/lBAP and 0.01mg/l NAA in mid-Spring and after disinfection. This research was carried out as factorialexperiment in a completely randomized design with four replicates and four observations per eachreplication. Tetra, GF677 and Nemaguard rootstocks produced the highest of plantlet numberrespectively. Nemaguard rootstock did not show any proliferation in Knop medium and Nemaguardexplants showed chlorosis on this medium. This medium caused chlorosis in produced plantlets of Tetraexplants. Explants of every three rootstocks were produced the highest plantlet number and length in MSmodified medium. Therefore, combinations of plant growth regulators were evaluated in this medium.Three different combinations were evaluated. Among different combinations of plant growth regulators(0.8 and 1 mg/l BAP and 0.1 and 0.5 mg/l NAA), the highest plantlet number and length were producedin MS medium containing 0.6mg/l BAP and 0.01mg/l NAA. Increase of plant growth regulatorsconcentrations led to vitrification and callus production in GF677 rootstock. The highest root number androoting percent were achieved in modified MS medium containing 1 mg/l NAA and explants of Tetrarootstock produced the highest root number and length.