Figure 7.
Rhizosphere acidification, Fe distribution, and ROS generation in the roots of the 35S::MdbHLH104-GFP transgenic apple plants and the wild-type control under iron-sufficient (+Fe) and -deficient (−Fe+Frz) conditions. A, Rhizosphere acidification of the wild-type control and transgenic apple lines. The yellow color around the roots stained with Bromocresol Purple indicates acidification. B and C, Phenotypic comparison of Fe (Perls/DAB) and ROS (C-H2DCFDH) staining in the roots of the transgenic apple plants as indicated. Scale bar, 200 μm.