Figure 2.

Primary root growth and hair development is affected in the prc1-1 mutant. (A) Root elongation of wild-type and prc1-1 between 2 and 9 days after germination. (B) Trichoblast cell lengths in wild-type, prc1-1, rhd6-1 and prc1-1/rhd6-1 primary roots (n = 600). (C) Number of root hairs per mm in trichoblast cell files of 7 day old wild-type, prc1-1, rhd6-1 and prc1-1/rhd6-1 seedlings. (D) Wild-type root showing single root hairs which have originated from the basal end of epidermal cells. Filled triangles mark the position of the basal walls of the hair forming epidermal cells. (E) prc1-1 root showing 2 hairs originating from a single epidermal cell (*) and a branched root hair where the branch point is highlighted by an open triangle. Error bars show SEM (B) or SD (C). Bar = 50 μm.