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Effects of lead (Pb, 150 and 300 µM) alone or in combination with methyl jasmonate (MJ, 0.5 and 1 μM) on the activity of superoxide dismutase (SOD, A), catalase (CAT, B), ascorbate peroxidase (APX, C) and glutathione reductase (GR, D) in rice leaves. Values (means ± SD, n = 5) followed by the same letter are not significantly different (P < 0.05; LSD test)
