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Effect of different silicon (1.0 mM) and PEG-6000 (20%) treatments on biochemical changes in a superoxide dismutase (SOD), b guaiacol peroxidase (POD), (c) catalase(CAT), d ascorbate peroxidase (APX) in the leaves of wheat seedlings (Triticum aestivum L. cv. Longchun 8139). Values are mean ± SD (n = 3). Means followed by same small letters are not significantly different according to the LSD test at P ≤ 0.05
