Figure 3.

Surface view of epidermal cell files in Arabidopsis tubulin mutants grown at 1g or 300g. Wild type (WT) and tubulin mutants were grown as in Figure 1. The outer surface of cells 10 to 12 from the top of hypocotyls was observed with SEM. Supplementary lines denote the longitudinal axis of hypocotyls and the alignment of epidermal cell files, for measuring the alignment angle. The bar denotes 100 μm.