Fig. 4. Laser scanning confocal microscopy images of onion epidermal cells, which were first stained with APMem-1 (10.0 μM) for 5 min and then incubated in 0.5 mol L⁻¹ NaCl solution for different times to achieve plasmolysis (a–c) and the following deplasmolysis (d–f). Scale bar = 50 μm (e: 20 μm).