Figure 4.

Phenotypic properties of the double-mutant slr1; slr2. A, Examples of 7-d-old double mutants. B and E, Close inspection of the primary root of a 12-d-old double mutant. D, The root system of a 25-d-old double mutant still displaying the defects in the early root system, but having late-developing crown roots with normal lateral roots. Coleoptilar node of WT (C) and double mutant (F), respectively. G, Aboveground phenotype of WT (left) and double mutant (right) after 32 d. H. Mature plants of WT (left) and double mutant (right) after 90 d. Arrows in C and F indicate the position of cross section for Figure 5, E and F. Bars represent 1 cm (A) or 1 mm (B–F).