Studying the effect of irrigation regimes and superabsorbent levels on the antioxidant enzymes on the relative permeability of cell membranes in sorghum (Sorghum bicolor L.)
Subject Areas : Journal of Plant Ecophysiologymansour fazeli rostampour 1 , مسعود فاضلی رستم پور 2
1 - Faculty Member Research and Education Center of Sistan
2 - دانش آموخته دانشگاه سیستان و بلوچستان
Keywords: Catalase, Superoxide dismutase, Glutathione peroxidase, Ascorbate peroxidase,
Abstract :
In order to evaluate the effect of irrigation regimes and superabsorbent polymer (SAP) on amount of antioxidant enzymes, leaf relative water content and relationships between them with relative permeability of cell membranes in sorghum, the experiment was conducted in Dashtak region of Zahedan during 2013 and 2014 seasons. The experimental design was a split plot with two factors including four irrigation regimes )40, 60, 80 and 100% crop evapotranspiration( as main plots, four amounts of SAP )0, 75, 150 and 225 kg ha-1( as subplots in a completely randomized block design with three replications. The results indicated that the effect of irrigation regimes, SAP levels and interaction effects of two factors were significant. The regression models estimated for superoxide dismutase, ascorbate peroxidase, glutathione peroxidase, catalase and RPCM showed that showed that by increasing the amount of irrigation and SAP, the traits were decreased. In addition, by decreasing in leaf relative water content, the antioxidant enzymes and relative permeability of cell membranes increased. The experiment findings indicate that at the application 75 kg ha-1 SAP and supplying 80% of sorghum water requirement, the relative permeability of cell membranes was 59.83, that was similar to 100% irrigation along with the application 150 and 225 kg ha-1 SAP.
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