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The effect of seed soaking with water or spermidine (Spd) on (A) superoxide dismutase (SOD) gene; (B) catalase (CAT) gene; (C) guaiacol peroxidase (POD) gene and (D) ascorbate peroxidase (APX) gene relative expression ratio in the process of seeds germination (7 days) under water stress induced by 15% PEG. Vertical bars indicate ± SE of mean (n = 4). Different letters above columns indicate significant difference. LSD (p ≤ 0.05).
