Fig. 2. Hypocotyl cell size, number and hypocotyl diameter in CAF-1 mutant seedlings. Seedlings of CAF-1 mutants and their corresponding wild types were grown as described for Fig. 1B, except that the seedlings were grown for 9 days. (A) The size of epidermal cells of the hypocotyl was measured for 10 seedlings of the mutants and wild types (about 300 cells per genotype). (B) The total number of epidermal cells along the hypocotyl axis was estimated from the hypocotyl length and the average cell size. (C) The diameters of hypocotyls of CAF-1 mutants and wild-type seedlings were determined. For A and C, the means±s.e.m. of the relative differences between mutant and wild type from three to five independent experiments are shown.