Figure 6.

Optical images and SEM images of Arabidopsis mesophyll cells exposed to SWCNTs. a Plant cells treated without or with 15 μg/ml SWCNTs; b and c plant cells treated with 15, 25 μg/ml of SWCNTs for 24 h. d Plant cells treated with 25 μg/ml of SWCNTs for 48 h; e plant cells without exposed SWCNTs as control; f plant cells treated with 15 μg/ml of SWCNTs for 24 h.