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. 2023 Feb 15;18(2):e0281756. doi: 10.1371/journal.pone.0281756

Fig 4. Effect of ZnO NPs and MWCNTs, alone or in combination, on enzyme activity and expression levels of genes encoding enzymes in Arabidopsis seedlings at 10 DAG.

Fig 4

(a) SOD activity in shoots. (b) SOD activity in roots. (c) CAT activity in shoots. (d) CAT activity in roots. (e) Relative expression levels of genes encoding multiple SOD isoforms in shoots. (f) Relative expression levels of genes encoding multiple SOD isoforms in roots. (g) Relative expression levels of genes encoding multiple CAT isoforms in shoots. (h) Relative expression levels of genes encoding multiple CAT isoforms in roots. Level of gene expression in control seedlings was set to 1. Data are the means ± standard errors of three replicates. Different letters indicate a significant difference between treatments (P < 0.05, by Duncan test). *P<0.05 and **P<0.01 compared with control plants (by Student’s t-test).