Table 1. Single filament dynamics in wild-type treated with mock or 10 µm TIBA.

Values given are the mean ± se, with n > 50 filaments from n > 10 root epidermal cells and at least 10 seedlings per treatment. Significantly different from mock control value by t test; **P < 0.01, ***P < 0.001. nd, Not significantly different from mock control value by t test; P > 0.05.

Stochastic Dynamics Parameters	Mock	TIBA
Elongation rate (µm/s)	1.5 ± 0.1	1.8 ± 0.1**
Max. filament length (µm)	7.1 ± 0.3	9.6 ± 0.5***
Max. filament lifetime (s)	14.7 ± 1.3	23.1 ± 1.7***
Severing frequency (breaks/µm/s; 10−2)	3.1 ± 0.2	1.8 ± 0.2***
Regrowth frequency (%)	2.4 ± 0.1	2.2 ± 1.1 (nd)
Annealing frequency (%)	11.7 ± 3.9	16.4 ± 3.6 (nd)
Bundling frequency (events/µm2/filament/s; 10−6)	6.1 ± 1.1	17.4 ± 2.3***
Debundling frequency (events/µm2/filament/s; 10−6)	1.7 ± 0.6	2.3 ± 0.9 (nd)