Fig. 1.

Four RN chemicals trigger different morphological changes. (A) Col-0 seedlings were grown on RN-supplemented media for 8 d. DMSO was used as control. Images display the effects of the RN at a representative concentration: RN1: 2 μM; RN2: 0.5 μM; RN3: 2 μM; RN4: 5 μM. (Scale bars, 1 cm.) (B–E) RN1 (B), RN2 (C), RN3 (D), and RN4 (E) selectively affected primary root length (RL), hypocotyl length (HL), and the number of lateral roots (LR). For each graph, the RN structure is reported. Statistics were performed using ANOVA and Tukey’s test. Means ± SEM are shown, n = 10 seedlings for each concentration of the dose–response; different letters indicate significant differences at P < 0.05. Concentrations in micromolars are indicated in brackets (B–E).