Fig. 2

a Fresh weight (FW) (g plant⁻¹) of control broccoli plants and plants treated with 10 mg l⁻¹ MWCNTs, 100 mM NaCl and 100 mM NaCl + 0^.10 mg l⁻¹ MWCNTs. Mean values ± standard errors are shown (n = 6). Bars with different letters are significantly different (p < 0.05) according to the Tukey test. b Picture showing the effect of MWCNTs (10 mg l⁻¹) on the growth of control and 100 mM NaCl-treated broccoli plants