Figure 2.

Conditional phenotypes of wild-type (wt) and arm plants to nitrate supply. Pictures of seedlings grown vertically on Murashige and Skoog medium with three nitrate concentrations: 0.6 mm (A, D, G, and J), 6 mm (B, E, H, and K), and 60 mm (C, F, I, and L) KNO₃ for 13 d (A–E) and 27 d (G–L). A to C and G to I, Wild type; D, E, and J to L, arm mutant. Bar = 2 cm. dag, Days after germination.