Electron micrographs at 10 magnification of litchi pericarp tissue at different storage times. a1 shows the microstructure of the pericarp of fresh litchis 1 day after harvest;
a2 shows the microstructure of the pericarp of fresh litchis 3 days post-harvest; b1 shows the microstructure of the pericarp of AF (35 C) litchis frozen and stored for 1 day; b2
shows the microstructure of the pericarp of AF (35 C) litchis frozen and stored for 60 days; c1 shows the microstructure of the pericarp of IF (35 C) litchis frozen and stored for
1 day; c2 shows the microstructure of the pericarp of IF (35 C) litchis frozen and stored for 60 days (bar ¼ 200 mm). Samples were stained with toluidine blue solution (0.1 g/L)
for 5 s