PJB-2020-130
The reaction of antioxidant activity to the simultaneous application of drought stress and spraying of potassium silicate in canola cultivars
Ebrahim Fani
Abstract
This experiment was designed with the aim of evaluation of the effect of potassium silicate spraying on the activity of antioxidant enzymes such as catalase (CAT), ascorbate peroxidase (APX), peroxidase (POX), superoxide dismutase (SOD) and malondialdehyde (MDA) of canola cultivars under drought stress conditions. This experiment was conducted in the field conditions and under the influence of drought stress and potassium silicate spraying during the stage of flowering during the 2016 -2017 season. Factors including different canola cultivars [Hyola401 (V1), Agamax (V2), Jacamo (V3), Jerry (V4)], drought stress levels, including normal irrigation (D1) and high stress conditions in stages of flowering (D3), before and after application of stress, normal irrigation was performed. Spraying levels, including 0 (S0) and 30 (S1) mM. Silicon spraying has a positive effect on the amount of antioxidant in drought stress conditions, so that, the highest and lowest amount of CAT was observed in D3S1 (26.39) and D1S0 (11.69), respectively. Also the highest and lowest amount of APX was observed in D3S1 (3.43) and D3S0 (2.00), respectively. The activity of antioxidant enzymes of canola was reduced under drought stress conditions. The spraying of potassium silicate increased the activity of these enzymes.
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