Fig. 10.

ACC gradient for gravity response. The WT (WS) and acs7-1 mutant were grown in half-strength Murashige and Skoog medium for 3 d and transferred to medium which contained 0.01, 0.1, 1, or 10 μM ACC, and the root curvature of the root tip was measured by ImageJ after a 12h change of the gravity vector (turned counterclockwise by 90 °). Significant differences between normal conditions and treatment groups are indicated by ** at P < 0.01 by Student’s t-test.