Figure 5. Scanning electron micrographs with 150 K magnification of rice leaves.

Scale bars  = 20 µm. SC, silica cell; WP, wart-like protuberance; SG, stomatal guard cell. A: the top second leaf epidermis of a control plant without silicon fertilizer at the anthesis stage; B: The top second leaf epidermis of a silicon-treated rice plant grown with slag (H) applied at a rate of 935 mg plant-available Si per kg soil at the anthesis stage.