Fig. 2

Changes in lateral root formation in response to different carbon nanoparticles. Three-day-old tomato seedlings were treated with distilled water (Con), 5 mg/mL MWCNT, single-walled carbon nanotubes (SWCNTs), graphene, and active carbon (AC), respectively, for another 3 days. a Representative photos were then taken. b The number and length of emerged lateral root (> 1 mm) per seedling were then determined as well. Scale bar = 50 mm. There were 30 (10 × 3) plants in three biological replicates, and the experiments were conducted for 3 times. Data are the means ± SE. Within each set of experiments, bars denoted by the same letter did not differ significantly at p < 0.05 level according to Duncan’s multiple test