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Foliar application of ascorbic acid improved drought tolerance and productivity of wheat (Triticum aestivum L.) [electronic resource].

By:

Kotb, M. A

Contributor(s):

Elhamahmy, M. A. M

Language: English Summary language: Arabic Description: p.1-16Other title:

تحسين مقاومة القمح وانتاجيته عن طريق الرش بحمض الاسكوربيك [Added title page title]

Uniform titles:

Agricultural research journal, Suez Canal University, 2013 v.13(1) [electronic resource].

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In: Agricultural Research Journal, Suez Canal University 2013 v.13(1)Summary: Little is known about ascorbic acid (AsA) role in counteracting the adverse effects of water stress on wheat growth and productivity under field conditions. Two field experiments were conducted in a sandy soil in the Experimental Farm, Faculty of Agriculture, Ismailia, Egypt during 2011/12 and 2012/13 seasons. The work aimed to study the effect of three levels of AsA (0.0, 100 and 200 ppm) on the response of wheat (Triticum asetivum, L. cv. Sakha 94) to three surface irrigation rates (1.00. 0.80 and 0.60 of the estimated crop evapotranspiration, which represented 4260, 3408 and 25 56 m3 /ha, respectively. Results indicated that, drought caused a reduction in each of leaf area index, total chlorophyll, relative water content, grain and straw yields. However, water deficit increased lipid peroxidation (as malondialdehyde, MDA) and protein oxidation as well as induced the activities of some antioxidative enzymes, superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT). The activity of SOD, APX and CAT was increased by about 74-108%,44-57% and 107-156%, respectively in flag leaf compared to the well watered wheats. Application of 100 -200 ppm of AsA significantly alleviated the oxidative stress damage of drought, reflected by improving above parameters as well as decreasing MDA and protein oxidation, but decreased activity of antioxidative enzymes by about 10-20 %.

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Little is known about ascorbic acid (AsA) role in counteracting the adverse effects of water stress on wheat growth and productivity under field conditions. Two field experiments were conducted in a sandy soil in the Experimental Farm, Faculty of Agriculture, Ismailia, Egypt during 2011/12 and 2012/13 seasons. The work aimed to study the effect of three levels of AsA (0.0, 100 and 200 ppm) on the response of wheat (Triticum asetivum, L. cv. Sakha 94) to three surface irrigation rates (1.00. 0.80 and 0.60 of the estimated crop evapotranspiration, which represented 4260, 3408 and 25 56 m3 /ha, respectively. Results indicated that, drought caused a reduction in each of leaf area index, total chlorophyll, relative water content, grain and straw yields. However, water deficit increased lipid peroxidation (as malondialdehyde, MDA) and protein oxidation as well as induced the activities of some antioxidative enzymes, superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT). The activity of SOD, APX and CAT was increased by about 74-108%,44-57% and 107-156%, respectively in flag leaf compared to the well watered wheats. Application of 100 -200 ppm of AsA significantly alleviated the oxidative stress damage of drought, reflected by improving above parameters as well as decreasing MDA and protein oxidation, but decreased activity of antioxidative enzymes by about 10-20 %.

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