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. 2015 Nov 30;12(12):15100–15109. doi: 10.3390/ijerph121214963

Figure 4.

Figure 4

Effect of Cu2+, Zn2+ and Al3+ on the root elongation of (a) maize and (b) rice. The values were given as mean ± SD (standard deviation) of triplicate samples with 10 seeds each.