Figure 6.

Lateral Root Development in Wild-Type and frd3-1 Plants in Response to Localized Fe Supply.

Lateral root density (A), lateral root length (B), and chlorophyll concentration (C) in the shoots of wild-type (Col-gl) and frd3-1 mutant plants. Seeds were germinated on Fe-deficient, half-strength MS medium for 7 d before transfer to segmented agar plates locally supplied with Fe(III)-EDTA only to the middle segment. Plant roots were scanned and the chlorophyll concentration determined after 15 d on Fe treatments. Bars represent means ± se; n = 7 to 12 plates with three seedlings per plate. Different letters indicate significant differences among means (P < 0.05 by Tukey’s test). FW, fresh weight.