The lateral root phenotype of cep mutants. (A) Representative lateral root phenotypes of 11-day WT plants and cep mutants. Scale bar, 1 cm. (B) Quantification of the number, length and density of lateral roots in WT plants and cep mutants. Data are shown as mean ± SD, n ≥ 20. Asterisks indicate statistically significant differences compared with WT as determined by Student’s t-test. *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001; ns, not significant.