Cd²⁺ distribution in the stele cells of wheat roots with metal-S coprecipitation method.

<p>Electron microscope images of Cd^<b>2+</b> distribution in the cell walls (A and B) and plasma membrane (C and D) of root stele cells of wheat plants grown in soil fortified with 0 (A and C) and 100 μg g^<b>-1</b> Cd^<b>2+</b> (B and D). Cd^<b>2+</b> was localized with the conventional metal-S coprecipitation histochemical method. Arrowheads indicate Cd^<b>2+</b> deposits.