Figure 2.

Root growth of Arabidopsis tip mutants under normal conditions and osmotic stress. A, Root length of Arabidopsis wild type (WT) and tip mutant lines over time grown on vertical plates containing half-strength Murashige and Skoog medium supplemented with 1.5% (w/v) Suc. Data are given as means of 48 to 72 plants ± se. B, Root length of Arabidopsis tip mutant lines over time after transferring 7-d-old seedlings from A to vertical plates containing half-strength Murashige and Skoog medium in the presence or absence of 1.5% (w/v) Suc supplemented with 0, 200, or 400 mm mannitol. Data are given as means of six to 16 plants ± se. Asterisks indicate significant differences from the wild type (Student’s t test, P < 0.05).