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Enzymes activities in young Brassica napus leaves of Fe-deprived (0 μM Fe), Fe-deficient (5 μM Fe) and Fe-sufficient (50 μM Fe) plants: (A) NADPH oxidase-like; (B) SOD; (C) DAB peroxidase (POD); (D) CAT; (E) alkaline protease (white bars) and caspase-3 (grey bars); (F) deoxyribonuclease (DNAse). Vertical bars: mean ± SE (n = 6). Bars carrying different letters are significantly different (95% Fisher LSD).
