Fig. 3

Longitudinal section of the third expanded leaf from the apex under LEDs (light-emitting diodes) and HPS (high pressure sodium) lamp. The leaf tissue was stained with Safranine O-fast green and was examined with OLYMPUS CCD camera at × 4, × 10, and × 20 magnitudes. AD: adaxial epidermis; AB: abaxial epidermis; PP: palisade parenchyma; SP: spongy parenchyma. The bar is 200, 100, and 50 μm for × 4, × 10, and × 20 magnitudes