Figure 1.

Movie 1. (A) Nuclear movement associated with root hair development in primary roots of Arabidopsis thaliana. Bar, 30 μm. The movie was created from 60 images collected at 3-min intervals. (B) Longitudinal representation of a primary root of A. thaliana, illustrating the developmental changes at the epidermal surface during root hair elongation. (C) Cross-sectional representation of a primary root of A. thaliana, illustrating the different cell types and their relationship to root hair elongation. (Panels B and C were redrawn from Schiefelbein et al. [1997] with permission of the authors).