Table 1. Actin Dynamics Parameters for cpb-1 and Wild-type Epidermal Cells.

Stochastic Dynamics Parameters	Wild Type	cpb-1
Elongation rate; µm/s	1.64 ± 0.45	1.67 ± 0.54ND
Severing frequency; breaks/µm/s	0.012 ± 0.006	0.009 ± 0.005*
Max. filament length; µm	11.9 ± 3.5	15.0 ± 5.0*
Max. filament lifetime; s	21.4 ± 7.1	26.5 ± 9.8*
Regrowth of severed ends; %	2.9 ± 1.4	3.5 ± 1.4ND
Annealing of severed ends; %	2.1 ± 1.0	9.3 ± 3.0*
Filament origin; % per cell
de novo	27.9 ± 12.7	27.6 ± 15.9
ends	21.8 ± 8.7	28.2 ± 11.3†
side	50.3 ± 14.7	44.2 ± 15.4

Measurements taken from epidermal cells in the top third of 5-d-old hypocotyls of the cpb-1 mutant and corresponding wild-type sibling plants. Values given are means ± se, with n > 50 filaments from n > 10 epidermal cells and at least 10 hypocotyls per line. For filament origin: n > 30 cells from at least 10 hypocotyls per line. ND, not significantly different from the wild-type control value by Student’s t test; P value > 0.05. *Significantly different from the wild-type control value by Student’s t test; P value ≤ 0.05. ^†Significantly different from wild-type control group value by analysis of variance; P value < 0.0001.