Ag particles in the leaves of Brassica juncea. Precipitates of different sizes are visible in the parenchymal cells (A, B, C). They are localized in the inner side of cell walls (A, W, arrows), in the condensed cytoplasm (B, Cyt, arrows) and in the chloroplasts (C, Chl, arrows). The wall architecture was modified, showing not compacted microfibrils (A, arrowheads). In (D), a xylem vessel (Xyl) contains numerous precipitates along the cell wall (W, arrows). In (E), the surrounding cells show also numerous precipitates, along the plasmalemma (arrows) and in the condensed cytoplasm (Cyt, arrows). Bars correspond to 250 nm in (A, B, C), 1,000 nm in (D) and 500 nm in (E).
Marchiol et al. Nanoscale Research Letters 2014 9:101 doi:10.1186/1556-276X-9-101