Figure 1

Cytological examination of tobacco trichomes. (A) Scanning electron micrograph of tobacco young leaf (~2 cm long) showing trichomes with head cells and stalk cells (× 120). (B) Light micrograph of the mature trichome showing head cells (× 1000). (C) Fluorescence microscopy of the trichome of (B), showing intensive red fluorescence of chlorophyll in the head cells (× 1000). (D) Transmission electron micrograph of trichomes, showing the chloroplast structures in the head cells (× 15,000).