1 2322-2727 Iranian Society of Plant Physiology 343 Droughts Stress Physiological and growth responses of 12 fennel (Foeniculum valgare Mill) genotypes to water potential at seedling stage 1 1 2016 4 14 1 16 27 11 2014 01 03 2015 Water deficit is a common and major constrain for agricultural production in arid and semi-arid parts of the world like Iran, to the extent that it might threaten the nation’s food security in years to come. Seed germination is a crucial growth stage that is often affected by environmental stresses, including drought. This study investigated the effects of four levels of water potential (i.e. 0, -0.2, -0.4 and -0.6 MPa) on germination, seedling characteristics, soluble carbohydrates, proline and polyphenols contents, and antioxidant enzymes activities of 12 fennel genotypes. Low water potentials reduced germination percentage and speed of germination, seedling fresh and dry masses, shoot length and superoxide dismutase specific activity, though it led to increases in root length, soluble carbohydrates, proline and polyphenols contents, and catalase specific activity. The 12 genotypes according to the degree of decreases in germination percentage at -0.6 MPa compared to control, were classified into three groups, including drought-tolerant (Shiraz, Yazd, Kerman and Mashhad), moderately-tolerant (Hamadan, Kashan, Bushehr and Urmia) and drought-sensitive (Birjand, Ardabil, AviSina and Isfahan). Mashhad, as a drought-tolerant genotype, indicated the greatest germination percentage, seedling fresh and dry masses, root length, soluble carbohydrates, proline and polyphenols contents, and catalase and superoxide dismutase specific activities among 12 genotypes studied. The results obtained in this study demonstrate some key aspects of the drought tolerance-related characteristics of fennel at germination stage that may help elucidate the whole plant performance of fennel at drought-stricken areas, when integrated with results from field studies.
146 others Investigation of change pigment level, metal uptake and growth characteristics of Madagascar periwinkle (Catharantus roseus) by nano zinc oxide Amirjani Mohammadreza e Askary Mehri f Askari Fatemeh g e Arak university f Arak university g Arak university 1 1 2016 4 14 17 30 19 10 2013 04 03 2015 Madagascar periwinkle is one of the important medicinal plants belonging to Apocynaceae family. In this study the effects of nano zinc oxide on growth index wet and dry weight, leaf surface, photosynthetic pigments, total carbohydrates and amount of elements were investigated. Experiments were designed completely randomized in greenhouse culture conditions with three replications. Zinc oxide nanoparticle in different concentrations (2, 4, 5, 10 and 15 µM) and hogland nutrient as control was given to Catharanthus roseus plant for 70 days. In addition to study the symptoms of zinc deficit used zero concentration. The results indicate that nanooxide in concentrations higher than 2 µM reduced wet and dry weight, photosynthetic pigments, total carbohydrates, iron and phosphorus. Also the results indicate that uptake of zinc in nano scale is higher. Uptake of potassium and zinc increased with increasing the concentration of nano zincoxide. This means intraction between these elements is positive while the intraction of phosphorus and iron with zinc element is antagonisticand with increasing concentration of nano-ZnO the uptake of these elements will be reduced. 177 Droughts Stress Evaluation of drought resistance in two turfgrass species native to Iran Mostafaei Elham h Roozban Mahmoud Reza i Etemadi Nematollah j Arab Mostafa k h University of Tehran i University of Tehran j Isfahan University of Technology k University of Tehran 1 1 2016 4 14 31 40 02 12 2013 04 03 2015 In recent decade, establish and maintenance of turf grasses is faced with serious doubts due to reduction of precipitation and water resources. So, identification of drought-resistant native and rangeland species, and introducing them as turf grass not only is effective in reducing water consumption, but also help to preserve the genetic resources of the country. In order to evaluate the usability of native grasses of Iran as drought resistance grass, Wheat grass and Bromus were compared with Perennial ryegrass (Control). In this experiment, drought stress treatments were applied with irrigation withholding, and continued until the entire shrivel of all species shoots. During the stress period, shoot growth, leaf color, relative water content, prolin content, leaf width, shrivel percentage, root penetration, root fresh and dry weight, effective depth of root density and shoot fresh and dry weight were measured. The results of this research showed that reduction of shoot growth in Bromus occur sooner than two other species. The decline of relative water content and changes of leaf width were lesser in Wheat grass than two other species. Increasing of shrivel percentage in Wheat grass was done with more delayed than two other species. Prolin content in Perennial ryegrass was the most and in Bromus was the least. The measurements related to root and shoot traits was the least in Bromus and the most in Wheat grass. Moreover, the recovery in Wheat grass was done completely and faster. In aggregate, Wheat grass could be introduced as a drought resistance grass instead of Perennial ryegrass. 265 Toxic ions stress Effect of sodium arsenate and gibberellic acid on proline, anthocyanin and phenol contents and agronomic triats in two varieties of rice (Oryza sativa L.) Khavari-Nejad Ramazan Ali l Najafi Farzaneh m Afshar-Mohammadian Mansour n Fallah Syeda Fatemeh o l Kharazmi University m Kharazmi University n Guilan University o Kharazmi University 1 1 2016 4 14 41 50 15 04 2014 28 12 2014 Arsenic contamination in soils often leads to groundwater contamination and arsenic toxicity in plants, humans and animals. Plant hormones play a quantitative and qualitative role in the coordination of growth and yield in plants. In this research the effects of gibberellin and sodium arsenate in different genotypes of rice were studied. The work has been conducted as a factorial experiment based on completely randomized design with four replications in the field condition. The 29 days old seedlings from two genotype of Tarom as a local and Shiroudi as hybrid rice were treated with sodium arsenate (0, 50 and 100 ;muM) and gibberellin (0 and 10 ;muM). The proline content in leaves and roots, anthocyanin and phenol content in leaves , plant height, main panicle length, filled grains, empty grains, 1000 grain weight, yield, total biomass and harvesting index were measured. The results indicated that soduim arsenate had significant effect on all of the investigated parameters, so that with increasing soduim arsenate the proline content in leaves and roots, anthocyanin and phenol content in leaves , plant height, main panicle length, filled grains, 1000 grain weight, yield, total biomass and harvesting index significantly decreased and empty grains of rice increased. However, this negative impact in the genotype of Tarom was more than Shiroudi. Gibberlin treatment significantly improved all examined parameters in two genotype of rice under both 50 and 100 ;muM sodium arsenate treatments, including proline content in leaves and roots, anthocyanin and phenol content in leaves, plant height, main panicle length, filled grains, 1000 grain weight, yield, total biomass and harvesting index. however, this positive impact in the genotype of Shiroudi was more than Tarom.. 292 Toxic ions stress Effect of foliar application of humic acid on aloe vera (Aloe vera L.) in cadmium contaminated soil Yadollahi Parviz p Asgharipour Mohammad Reza Golshani Farshad p Young Researchers and Elite Club, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran. University of Zabol University of Zabol 1 1 2016 4 14 51 60 04 07 2014 15 03 2015 Cadmium (Cd) pollution is a major environmental and human health threat. Therefore there is a need for cost-effective remediation procedures. Chelators such as humic acid have shown positive effects in enhancing resistance to various stresses. The objective of this research was to investigate the use of humic acids at cadmium-contaminated soil on growth and soluble sugar concentration of aloe vera (Aloe vera L.). The experimental design was factorial with three cadmium levels: 0 (control), 4 and 6 mg kg-1 of soil, and four levels of humic acid spraying including 0, 0.5, 1.5 and 3 g lit-1. The experiment was conducted in 2012 at the Zabol University greenhouse. Cadmium contamination at 4 mg kg-1 increased quantitative traits and did not interfere with plant growth. However, 6 mg Cd kg-1 decreased fresh and dry weight of root and shoot, leaf length, leaf thickness, gel weight and plant height. In addition, toxic dosage of Cd (6 mg kg-1) increased soluble sugars of glucose, mannose and xylose. Application of humic acid had no effect on root length, root dry weight and soluble sugars of glucose, mannose and xylose. However, due to its positive impact on fresh and dry weight of shoot and some morphological characteristics, the humic acid spraying was recommended, but more research is needed. 315 Droughts Stress Effect of bacteria growth on metabolite production and compatible characteristics Hamedani cultivar of alfalfa during drought Zafari Mahnaz ebadie ali parmoon ghasem jahanbakhsh soodabe University of Mohaghegh Ardabili University of Mohaghegh Ardabili University of Mohaghegh Ardabili University of Mohaghegh Ardabili 1 1 2016 4 14 61 76 19 09 2014 22 04 2015 Drought is one of the most important environmental stresses that adversely affect plant growth and crop production will In order to study a factorial randomized complete block design with three replications in greenhouse Ardabil University mohaghegh was conducted in 2013. Treatments were water stress at three levels: 35%, 55% and 75% field capacity and seed inoculated with mycorrhiza growth promoters (Glomus Mosseae), Rhizobium (Sinorhizobium meliloti), a mixture of both experienced and non-inoculated as results showed main effects and interaction between water stress and seed inoculation rates at 1% level of proline, soluble sugar, membrane stability, osmotic potential, plant height and leaf area was significantly influence of alfalfa, however lysine and methionine levels were changed only main effects. Increase the stiffness of proline, soluble sugar and decrease osmotic potential, membrane stability, lysine, stem height and leaf area were. Growth stimuli by increasing the production of metabolites and increased osmotic potential and membrane stability reduces the damaging effects of stress and increase plant height and leaf area were of alfalfa. Mycorrhiza and Rhizobium have performed better in most traits, but simultaneously they always showed the highest value. Also according to the regression equations in tension 85% proline and methionine had the highest share in the determination of cell water and the portion of the methionine reduces stress and enhances the contribution of soluble sugars and proline in determining the relative water content increases this increases the osmotic potential contribution in determining the relative water content in cells. Rhizobium and mycorrhiza mixture of proline and methionine, the highest share in determining the relative water content of the cells showed. Changes in leaf water content of a quadratic equation, but stem cells compared with less leaf area affected by the water content of cells Generally use a mixture of mycorrhiza and Rhizobium is always the best treatment for reducing stress have to show that there is a relationship between them Synvzhysty 293 Droughts Stress Drought stress effects on morphological traits and enzymatic antioxidant activity of two rapeseed (Brassica napus) cultivars Seyed Ebrahimi Fateme Sadat Hassani Kumleh Hassan Alami Ali Rezadoost Mohammad Hossein Biotechnolgy group, Faculty of agricultural science, university of guilan Biotechnolgy group, Faculty of agricultural science, university of guilan Biotechnolgy group, Faculty of agricultural science, university of guilan Biotechnolgy group, Faculty of agricultural science, university of guilan 1 1 2016 4 14 77 92 05 07 2014 28 12 2014 Drought stress is a critical and inevitable phenomenon damages successful crop production in various intensity every year in different parts of the world during different times. This research was done to evaluate the effects of drought stress on some traits related to leaf (leaf weight, leaf area and chlorophyll content) root (root weight) and shoot (weight and length) further enzymatic antioxidants activity of superoxide dismutase (SOD) and peroxidase (POD) in sensitive Hyola308 and resistant SLM046 cultivars of Brassica napus. Experiments were done according to factorial design on the base of completely randomized design with four replications for morphological and physiological traits and 2 replications for enzyme assays. Seedlings were cultured in MS medium suspension including 0%, 3%, 6%, 12% and 15% w/v PEG 6000. Leaf samples were collected at 0, 3, 6, 12, 24, 48, 72 hours after culture subsequently. Traits evaluation showed significant difference between two cultivars. Leaf area and weight, shoot length and root weight were decreased with the increment of PEG amounts and stress exposure time in both cultivars. Chlorophyll content in sensitive cultivar was higher than in resistant cultivar significantly. Drought stress induced significant shoot weight reduction in both cultivars. According to results, intensity of response and SOD activity in resistant cultivar was more than in sensitive cultivar. POD activity was high in SLM046 in severe drought condition and in Hyola308 this activity was increased at initial times of drought stress. 336 Salt Stress Effects of Salt Stress on antioxidants activity and seedling traits of Safflower (Carthamus tinctorius L.) Genotypes 1 1 2016 4 14 93 104 15 11 2014 15 03 2015 .Salt stress is one of the major abiotic stresses especially in arid and semi-arid regions. This investigation was conducted to evaluate the effects of the salt stress on Ascorbate Peroxidase (APX) and Superoxide Dismutase (SOD) activities in safflower genotypes based in on a factorial experiment as a Completely Randomized Design (CRD) with three replications. The experimental factors were six genotypes of safflower (Arak, Isfahan, Khorasan, C111, AC-stirling and Saffire) and five levels of salinity (zero as control, 50, 100, 150 and 200Mm NaCl). There was a significant difference between genotypes in activity of SOD and APX enzymes under salt stress, with notable superiority of Isfahan genotype than other genotypes. Maximum activity of SOD was 99.16 uni/g Fw for Isfahan genotype in 150 Mm NaCl. In general, it seems that Isfahan genotype was more tolerant to salinity though, AC-stirling was the most sensitive genotype to salt stress. The results showed that Isfahan genotype had the greatest APX activity with 91unit/g FW although, AC-stirling had the lowest content with 58unit/g FW at control treatment. The activity of both enzymes increased with increasing salinity levels, which depended upon genotypes. APX and SOD activity decreased at 200 Mm NaCl concentration. APX and SOD activity decreased at the 200 Mm NaCl concentrations. Analysis of seedling traits showed that, the genotypes of Isfahan and Ac-sterling had the most and the least amounts of measured traits, respectively. In general, Isfahan genotype of safflower could be recommended in salt breeding programs. 165 others Effects of proline treatment on some morphological and physiological characteristics and increment of post-harvest life of tuberosa cut flower (Polianthes tuberosa L.) 1 1 2016 4 14 105 114 22 04 2014 04 03 2015 Tuberosa (Polianthes tuberosa L.) is one of the most important cut flowers in Iran and word wide which the increment of postharvest life of this flower is very important. In this research proline as an antioxidant compound was used in 0(control), 1 and 10 micro molar concentrations and the effects of this compound on some morphological and physiological characteristics and vase life of tuberosa cut flower were investigated. The experiments were performed in a completely randomized design with 3 replicates. Results showed the significant effect of proline on vase life of tuberosa in both concentrations. The percentage of open flower increased in both proline concentrations. Finding showed the significant decrease in the wilted percentage of flower in both concentration of proline when compared with control flowers. The abscission percentage of flower also is very lower than the control flower. In according to the results, proline in both concentrations decreased the water loss and membrane leakage and the 10µM proline had the most effect. In flowers which were treated with proline, the activity of guaiacol peroxidase, catalase, ascorbate peroxidase and phenyalanine ammonialyase enzymes increased while the activity of polyphenol oxidase enzyme decreased. It seems that proline increment the postharvest life of tuberosa flower through the increase of antioxidant enzymes and decrease of polyphenol oxidase activity. 338 Horticulture Effect of iron foliar application on some physiological characteristics and fruit quality of peach (Prunus persica CV. Alberta) Hosseini Molla Seyed Mohammad Hosseini Molla Seyed Mohammad Askari Sarcheshmeh Mohammad Ali Khademi Orang 1 1 2016 4 14 115 124 18 11 2014 15 03 2015 In calcareous and alkaline soils, which include most of Iran soils, iron deficiency is prevalent. The main cause of iron deficiency chlorosis is high pH of soil. Among fruit trees, peach shows high sensitivity to iron deficiency. Chelated iron fertilizers with a great ability to make iron soluble and readily absorbed by the plant are used for iron deficiency. For this purpose, an experiment based on a randomized complete block design with three replications was designed and the effect of foliar spray of chelated iron at concentrations of 0, 5 and 10 mg/l on fruit quality of peach (CV. Alberta) was studied. In this experiment the parameters such as amount of soluble solids, titratable acid, flavor index, firmness, antioxidant activity, vitamin C, cell membrane electrolyte leakage, ethylene production and leaf pigments were studied. The results showed that by increasing iron concentration leaf chlorophyll content and antioxidant activity of fruit were increased. Significant effect on carotenoid content of leaves, vitamin C and fruit firmness under different concentrations of iron wasn’t observed. Ethylene production and cell membrane electrolyte leakage also decreased with increasing iron concentration. According to the results, peach fruit quality improved by foliar application of chelated iron during growth. 263 Droughts Stress Effect of priming and seed size on dry matter and antioxidant enzymes activity of sainfoin seedling in drought stress 1 1 2016 4 14 125 138 14 04 2014 08 04 2015 Abstract In order to evaluation of seed (pod) priming and seed size (pod) effects on growth and anti oxidant enzymes activity of sainfoin (onobrychis viciifolia Scop.) seedling in normal and drought condition, this experiment was carried in green house condition in 2010. Treatments (16) included: two masses (Borojen and Ghazvin), two seed sizes (large, >4.5 mm and small, 4.5>…>3.5 mm) and four seed priming ( hydropriming, priming with PEG and CaCl2 and non priming) that were evaluated in a factorial experiment in CRD in drought (use of 80% available water in pot soil) and normal (use of 55% available water in pot soil) conditions. Results showed that dry matter reduced in drought condition for all treatments, but the most weight was obtained from Borojen mass, large size and hydroprimed seedlings in compared with Ghazvin mass, small size and nonpriming in drought condition. Antioxidant enzymes (SOD, POX, APX and CAT) activity in Borojen, large size and hydroprimed seedling treatments were further than Ghazvin mass, small seeds and nonpriming treatments in normal and drought stress. H2O2 in Ghazvin mass, small seeds and nonpriming seedling were higher than other treatments. In sum, results showed that seedling growth, seedling tolerance indexes to drought stress were improved by use of Borojen mass, large seeds and hydroprimed seeds, in drought condition. 172 Plant Growth Regulators Effect of salicylic acid hormone on violet (Viola cornuta) ornamental and phytochemical attributes under phosphorus Nano-fertilizer Ghorbani Nayyereh Moradi Hossein akbarpour Vahid ghasemnejad Azim Sari Agricultural Sciences and Natural Resources, Sari, Iran Sari Agricultural Sciences and Natural Resources, Sari, Iran Sari Agricultural Sciences and Natural Resources, Sari, Iran Gorgan Agricultural Sciences and Natural Resources, Gorgan, Iran 1 1 2016 4 14 139 150 25 11 2013 14 02 2015 Violet has many application in landscaping and herbal medicine . Salicylic acid hormone and phosphorus Nano-fertilizer compounds are considered as effective in regulating physiological processes and plant secondary metabolites. Therefore, a factorial experiment based on completely randomized design with 2 agent salicylic acid and fertilizer phosphorus Nano-fertilizer in 3 replications. Spraying with different levels of 0 ,0.1 ,0.7 ,1.5 mM hormone salicylic acid and phosphorus Nano-fertilizer at levels of 0 ,0.5 ,1.5 and 3 g/l in three stages on violets was applied. Morphological parameters were including diameter and number of flowers, flower spikes shoot length ,fresh weight and dry matter percentage violet flower . Phytochemical and biochemical parameters including photosynthetic pigments (chlorophyll a, b and carotenoids ) and antioxidant capacity & anthocyanins with spectrophotometry and quercetin & rutin values were determined by HPLC. The results indicate that salicylic acid and phosphorus Nano impact on most morphological and phytochemical at 1 and 5 percent. Both treatments increased the levels of morphological characteristics and pigments. High levels of salicylic acid and lower phosphorus Nano improved secondary metabolites. So to achieve maximum plant biomass and optimizatied secondary methabolites, application of different concentrations of the hormone and phosphorus Nano to increase the characteristics value of medicinal and ornamental , is required. 262 others Effect of sowing date on yield and some physiological index six forage maize cultivars in Rasht region Hashempur Baltork1 Fariba Majidian Majid Esfahani Masoud Rabiei Babak University of Guilan University of Guilan , University of Guilan , University of Guilan 1 1 2016 4 14 151 164 12 04 2014 22 04 2015 To investigate the effects of sowing date on yield and some physiological index of six forage maize cultivars in Rasht region, a field study was conducted in 2010. The experimental design was randomized complete blocks with factorial arrangement with three replications. Treatment consisted of four levels of sowing date (22 May, 3, 15 and 25 June), and six maize cultivars (SC 260, DC 370, SC 500, SC 647, SC 700 and SC 704). Results showed that sowing date and cultivar had significant effects on forage yield (dry and fresh) traits. The sowing date 3 June and cultivar SC 700 from a point forage yield (dry 28220.6 kg ha-1 and fresh weight 87017 kg ha-1) were better than other cultivars and sowing dates. The maximum LAI and CGR obtain from sowing date 3 June and cultivar SC 700. Based on the results obtained from this study sowing date 3 June and cultivar SC 700 with more suitable growth indexes is the reasons of increasing in leaf area development, plant photosynthesis activity, dry matter yield and finally more yield, was suggested in Rasht reign conditions. 260 Droughts Stress The study of some physiologic and biochemical traits to drought stress and methods of Fe fertilizer application in chickpea Ahmadi Loghman Ghobadi Mokhtar Saeidi Mohsen Ghaderi Jalal Razi University Razi University Razi University Center of agricultural and natural resources research 1 1 2016 4 14 165 176 11 04 2014 15 03 2015 The objective of this research was to study the effects of draught stress and Fe fertilizer on some physiologic and biochemical characteristics in chickpea (Cicer arietinum L.). This study was conducted at Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran, during 2011-12. The experiment laid out as split plot based on RCBD with three replications. Rainfed and without draught stress treatments were as main-plot. The levels Fe Fertilizer were as sub-plot contain eight levels (not-application of Fe Fertilizer (F1), soil-application of Fe Fertilizer (F2), Fe foliar application at branching (F3), Fe foliar application at flowering (F4), Fe foliar application at podding stage (F5), Fe soil application + Fe foliar application at branching (F6), Fe soil application + Fe foliar application at flowering (F7) and Fe soil application + Fe foliar application at podding stage (F8). Results showed that draught stress treatments had significant reduced photochemical capacity photosystem II, crop growth rate, chlorophyll content, leaf area index and Catalase specific activity. Fe fertilizer treatment had significant effect on chlorophyll content, leaf area index, Catalase specific activity and Peroxidase specific activity. Therefore, it seems that Fe foliar application improved the traits related to photosynthesis and reduced the undesirable effects of drought stress on chickpea plants. 312 others Effect of soil moisture on Wheat and Canola root respiration rates in two soil textures Meskini-Vishkaee fatemeh Mohammadi Mohammad Hosein Neishaboori Mohammad Reza Shekari Farid university of Zanjan university of Zanjan university of Tabriz university of Zanjan 1 1 2016 4 14 177 188 03 09 2014 17 03 2015 This study was performed under greenhouse condition and completely randomized design for wheat and canola at near saturated soil moisture condition to field capacity (seven soil matric suction treatments including 20, 40, 60, 80, 110, 300 and 500 cm with three ) in two consecutive years. The results showed that as the soil moisture content decreases from saturation condition, root respiration rate increases. The range of soil moisture with a maximum root respiration rate in the sandy loam soil was wider in wheat (0.22-0.29 cm3cm-3) than canola (0.24-0.26 cm3cm-3). In sandy loam soil, maximum root respiration rate was higher for wheat (9.81 mol m-2 s-1) than canola (7.62 mol m-2 s-1). While in the clay loam soil, maximum root respiration rate of wheat and canola was approximately equal (10 mol m-2 s-1) at a specified soil moisture content (0.42 cm3 cm-3). Moreover, in the sandy loam soil, the air-filled porosity of 13 and 16%, respectively for wheat and canola were associated with soil moisture content corresponding to maximum root respiration rate. While in the clay loam soil, the air-filled porosity of 17% was for both plants. The results showed that, among the various morphological features of roots, the root volume is the most important feature that controls the respiration rate of the plant roots. 110 Salt Stress Effect of selenium on shoot dry matter yield, activity of GPX and concentrations of selected micronutrients in wheat under saline conditions sadeghi Mehri Khoshgoftarmanesh Amirhossein Daneshbakhsh Bahareh Department of soil science, Faculty of agriculture Department of soil science, Faculty of agriculture Soilless culture research centre 1 1 2016 4 14 189 200 28 07 2013 24 12 2013 Selenium (Se) is a beneficial element for plant but at high concentrations, it is toxic and causes in plant growth retardation. There is limited information about the effects of Se on salinity-induced damages on wheat. Therefore this study was carried out to investigate interaction of salinity and Se on root and shoot dry matter yield, activity of GPX, and concentrations and uptake of selected micronutrients in roots and shoots of wheat. Two wheat cultivars (Triticum aestium cvs. Kavir and Back Cross-Rushan) differing in micronutrient efficiency were treated with four levels of Se (0, 20, 40 and 150 µM) and two salinity levels (0 and 100 mM NaCl). The effect of application of different Se concentrations on the shoot dry matter yield of wheat varied upon crop cultivar and salinity level. Application of Se at 20 µM concentration resulted in increase of shoot dry matter weight of ‘Back Cross-Rushan’ under salinity conditions. Selenium at 40 µM level increased shoot dry matter yield of Kavir cultivar at non-saline conditions. The effect of Se on activity of GPX was dependent on the wheat cultivar and Se level. In general, activity of GPX in roots of both wheat cultivars exposed to salinity stress was increased by application of 20 and 40 µM Se. Also, at saline conditions, application of 20 µM Se increased activity of GPX in shoots of both wheat cultivars. According to the results obtained from the present study, Se nutrition had positive effects on dry matter yield of wheat especially in salinity condition, but this effect depended on crop cultivar and applied Se concentration.