Fig. 2. SHR::GFP moves only into the first of the supernumerary endodermis-like layers. Longitudinal confocal image of a pSCR::SHR, pSHR::SHR::GFP transgenic root. The pSCR::SHR background produces supernumerary layers as described previously (Nakajima et al., 2001) and the fusion protein SHR::GFP is detected in the stele and in the first layer in contact with it (arrowheads). ep, epidermis; sn, supernumerary layers; st, stele. Scale bar: 25 µm.