Fig. 6. Involvement of IAA14/SLR in lateral root initiation above the basal meristem. (A) IAA14::GUS expression in the root tip limited to the root cap. Arrowheads point to the edge of the root cap. (B,C) Analysis of pIAA14:mIAA14-GR seedlings upon transfer from media with Dex to media with (B) and without (C) Dex. Above the black line, lateral roots are formed in the region previously subjected to Dex after transfer to Dex-free medium (C), whereas this is not the case after transfer to Dex medium (B). The region `a' in C between solid and broken line is the distal part of the root that can form lateral roots after transfer to Dex-free medium.