Migration/transport of nanoparticles to individual cells close to the magnet location. A) Low magnification TEM micrograph, showing the position of the cell carrying nanoparticles (CCN) respect to a xylem vessel (Xy). The CCN does not show any special differential features in the cytoplasm in comparison with the neighbouring cells. B) High magnification image of the CCN showing the location of several nanoparticles (arrows). C, D, E) Details of some isolated nanoparticles of those arrowed in (B). Bar in A and B = 5 μm; C = 100 nm.