FIGURE 1 The transverse cross-sections of the taproot of ”Guoxin 02” and ”Ji 228” varieties sampled at different areas on the taproot 15 days after the treatment and stained with acridine orange fluorescent nuclei. Note: acridine orange fluorescent nuclei are not visible in these images because they are located deeper within the tissue, as indicated by a laser scanning confocal microscope. The red arrow indicates the lacunae area.