Localization of Ag particles in the roots of Festuca rubra (A) and Medicago sativa (B, C, D). Electron-dense Ag spots are visible on the plasmalemma of the cortical parenchymal cells (A and B, arrows). In (A), arrowheads indicate the detachment of the plasmalemma from the cell wall. In (C), small particles are visible on the cell wall (W) and in the lumen of a xylem vessel (arrows). In (D), a detail of a xylem vessel showing the beginning of deposition of electron-dense Ag particles at the vessel pit (P) is visible (arrows). Bars correspond to 500 nm.
Marchiol et al. Nanoscale Research Letters 2014 9:101 doi:10.1186/1556-276X-9-101