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. 2020 Jun 4;5(23):13566–13577. doi: 10.1021/acsomega.0c00030

Figure 4.

Figure 4

Morphological responses of B. nigra upon exposure to ZnO and CuO nanoparticles. Error bars represent the SE (n = 6), and similar letters mean no statistical difference between treatments in Tukey’s test (p ≤ 0.05). (A, B) Leaf area; (C, D) number of nodes/plant; and (E, F) primary root length/plant and secondary roots/plant in the presence of ZnO and CuO NPs, respectively.