Mahdieh Amirinejad; Gholamali Akbari; Amin Baghizadeh; Iraj allahdadi; Maryam Shahbazi; Masoomeh Naimi
Abstract
To determine the effects of drought stress and foliar application of zinc and iron on some biochemical parameters of cumin (Cuminum cyminum L.), a greenhouse experiment was carried out at Graduate University of Advanced Technology of Kerman, Iran during 2011-2012. The experiment was conducted in factoriel ...
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To determine the effects of drought stress and foliar application of zinc and iron on some biochemical parameters of cumin (Cuminum cyminum L.), a greenhouse experiment was carried out at Graduate University of Advanced Technology of Kerman, Iran during 2011-2012. The experiment was conducted in factoriel design based on randomized completely block with three replications. Three levels of water deficit 70 (well- watered), 50 and 30 (moderate and severe stress) percent of field capacity with treatments of Zn, Fe, Zn+Fe (5/1000) and non-foliar application (water) were used. Results show positive effects of iron and zinc foliar application under drouth stress on some biochemical parameters of cumin. Maximum quantities of total protein and proline (4.12 and 364.52 mg/gr Fw) and maximum quantities of soluble sugar (5.62 mg/gr Dw) were observed in severe stress with Zn+Fe treatment. Also zinc and iron foliar application decresed malondealdohide (9.16 and 5.06 µM/gr Fw) in moderate and severe stress conditions in cumin leaf, respectively. Drought stress and foliar application increased enzymes activities. Maximum quantities of enzymes activities (catalase: 28.51, gayacol peroxidase: 284.75 and superoxid dismutase: 50.99 U/mg protein) in leaves were observed in severe stress with Zn+Fe treatment too. According to our results, iron and zinc foliar application improves biochemical parameters in cumin under drouth stress.
Sanaz Afshari-Behbahanizadeh; Gholam Ali Akbari; Maryam Shahbazi; Iraj Alahdadi
Abstract
In order to evaluate the effect of terminal water deficit stress on leaf traits and their relations to grain yield in different barley genotypes (‘Yousof’, ‘Fajr30’, ‘Nosrat’, ‘PBYT-46’, ‘PBYT-97’ and ‘Morocco’), two separated experiments ...
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In order to evaluate the effect of terminal water deficit stress on leaf traits and their relations to grain yield in different barley genotypes (‘Yousof’, ‘Fajr30’, ‘Nosrat’, ‘PBYT-46’, ‘PBYT-97’ and ‘Morocco’), two separated experiments were conducted in stress (water withholding from anthesis towards the end of growing season), and non stress (normal irrigation) conditions based on RCBD with three replications in 2010-2011 at Yazd Agricultural Research Station. The results indicated that drought stress significantly reduced leaf area index, greeness and increased canopy temperature and leaf rolling. Also, drought stress significantly increased epicuticular wax content at 21 days after anthesis. Studying by Scanning Electron Microscope (SEM) confirmed the increased dispersal of leaf wax crystals in leaf surface in ‘Yousof’ and ‘PBYT-46’ genotypes. ‘Fajr30’ genotype with the highest amount of cuticular transpiration and canopy temperature had the highest reduction in grain yield and ‘Yousof’ and ‘PBYT-46’ genotypes with higher amount of wax crystals dispersal, lower amount of cuticular transpiration, canopy temperature and greeness reduction in stress condition, had the least reduction percentage in grain yield. According to the non significant correlation between leaf wax and grain yield in both conditions (stress and normal) and in stress condition, it seems that increased epicuticular wax crystals had a more effective role than the quantity of wax in drought tolerance of barley genotypes.
Reyhaneh Pishkam Rad; Ali Izadi Darbandi; Maryam Shahbazi; Mehdi Fazel Najaf-Abadi; Hamid Reza Nikkhah; Raha Abedini; Morteza Barati
Abstract
In order to study the reaction of barley genotypes to drought, an experiment was conducted in a factorialdesign based on CRD for two wild ecotypes and four crop genotypes of barley in greenhouse. In thisstudy, the barley genotypes and wild ecotypes as the first factor and irrigation treatment with three ...
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In order to study the reaction of barley genotypes to drought, an experiment was conducted in a factorialdesign based on CRD for two wild ecotypes and four crop genotypes of barley in greenhouse. In thisstudy, the barley genotypes and wild ecotypes as the first factor and irrigation treatment with three levelsinclude 70 percent of water holding capacity of soil, 30 and 10 percent as the second factor wereconsidered as treatments. Analysis of growth and other morphological characteristics such as tillers, plantheight and leaf number and leaf area per plant and some physiological characteristics including therelative water content, leaf chlorophyll content, osmotic potential, osmotic adjustment, stomatalconductance, canopy temperature in each three treatments were measured. Analysis of variance showedthat the effect of drought on all traits and differences between genotypes were significant. Results ofcorrelation revealed that there is a significant and direct relationship between relative water content withosmotic potential and percentage of dried material. Path analysis identified that osmotic potential had themost direct effect on died material. The 41-1 and Morocco genotypes showed greater sensitivity thanother genotypes to the applied stress.