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Abstract

A pot culture experiment was conducted at the greenhouse of soil and water resources department in College of Agriculture, University of Baghdad in Abo-Ghraib at season 2009-2010 to investigate the effects of using foliar application of some macro and micronutrients in induce antioxidant enzymes in wheat grown under salt stress . Doar85 planted under three levels of salt stress, and three combinations of foliar application were used from nutrients (K+ Ca) at 3000 and 1500 mg.L-1 respectively, and (Fe + Zn + Mn) at 30, 20, and 10 mg.L-1 respectively , and ( K+ Ca) + (Fe+ Zn + Mn). The results showed that increasing levels of sodium chloride in the irrigation of water significantly increased at p<0.05 levelSOD and POD activity ,while CAT activity was decreased in leaves of wheat, and dry matter yield of wheat plants. The results obtained showed that there wassignificantdifferencesat p<0.05 levelbetween wheat cultivars in their responses to salt stress.Also the results showed that application of foliar fertilizers led to significant decreaseat p<0.05 levelin SOD and CAT activity in leaves in all levels of sodium chloride compare with control, while CAT activity was increased. Results revealed that combination of ( K+ Ca) + (Fe+ Zn + Mn) was significantly superior to other treatments for all Parameters, when irrigated with saline water of 50 and 100 mM NaCl . L-1compared with no foliar fertilizers . That is clearly show the importance of foliar application in justificationand inductionof antioxidantenzymes and alleviation of the adverse effect of salt stress on growth of wheat .

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