Fig. 4. The identities of differentiated tissues in the RAM remain in the hlr mutant. Cell arrangement and cell-type-specific markers in the post-embryonic RAM of wild type (A,C,E,G,I) and hlr-1 mutants (B,D,F,H,J). Arrowheads indicate the QC. (A,B) PI-stained root tips of 6-day-old seedlings. (C,D) Lugol-stained root tips. Starch granules, a marker for the root cap, are visualized. (E,F) Expression of J1092, a marker for the lateral root cap, in 6-day-old seedlings. (G,H) Expression of SHRp::GFP, a marker for the stele, in 6-day-old seedlings. (I,J) Expression of SCRp::GFP, a marker for the QC, cortex/endodermal initial cells and endodermis, in 6-day-old seedlings. Scale bar: 25 µm.