Crop sensitivity to C17. A to C, Root growth of rapeseed (A), tomato (B), and soybean (C) in the absence (left) or presence of 1 µm (middle) and 5 µm C17 (right). Germinated dicotyledonous crops grown on 1/2 MS medium were transferred for 2 days to control medium or medium containing 1 µm or 5 µm C17. Scale bars, 2 cm. D, Root length quantification of plants in A, B, and C. E to G, Root growth of rice (E), wheat (F), and maize (G) in the absence (left) or presence of 1 µm (middle) and 5 µm C17 (right). Germinated monocotyledonous crops grown on 1/2 MS medium were transferred for 2 days to control medium or medium containing 1 µm or 5 µm C17. Scale bars, 2 cm. H, Root length quantification of plants in E, F, and G. Data represent mean ± sd (n > 4 plants). Statistically significant differences compared to plants in absence of C17 are indicated; *P < 0.01 (two-sided Student's t test).