Fig. 2.

Primary root elongation on MS and sulphur-free medium :wild type versus mutants. Seeds of the wild type and the mutant were germinated on the MS or sulphur-free medium and the plates were placed vertically. The image was recorded when seedlings were 12 d old. (A) The wild type (wt) versus sue3 on MS medium. (B) The wild type (wt) versus sue3 on sulphur-free medium. (C) Growth curves of primary roots. The primary root length was measured every 3 d for the wild type and sue3 grown on MS as in (A) (wt/MS versus sue3/MS) and sulphur-free medium as in (B) (wt/–S versus sue3/–S). Values represent the mean of >30 plants and error bars represent SEM. (D) The wild type (wt) versus sue4 on MS medium. (E) The wild type (wt) versus sue4 on sulphur-free medium. (F) Growth curves of primary roots. The primary root length was measured every 3 d for the wild type and sue4 grown on MS as in (A) (wt/MS versus sue4/MS) and sulphur-free medium as in (B) (wt/–S versus sue4/–S). Values represent the mean of >30 plants and error bars represent SEM. (G) Shoot weight to root length. The primary root length was measured as in (C) and (F), and the fresh weight of shoot was measured after 12 d. Values represent the mean of >30 plants and error bars represent SEM. **P <0.01, ***P <0.001. (This figure is available in colour at JXB online.)