Fig. 4. shy2-2 and shy2-31 root hair outgrowth determined by time-lapse analysis. (A) Mean root hair growth rate calculated from images taken at 10-minute intervals after the transition to tip growth. Growth rate is therefore presented as mean increase in length per 10-minute interval. (B) Mean increase in trichoblast cell length following root hair initiation. (C) Time taken for a hair to reach final length from the initiation bump stage. The values shown are the means of at least 5 hairs for A and C and 10 trichoblasts for B. Bars represent standard errors of the means.