Fig. 1. Effect of ethanol treatment on the color of lettuce stem discs during storage at
5 C. Color parameters: (A) L* (from 0 black to 100 white); (B) a* (from ea* green
to þa* red) and (C) b* (from eb* blue to þb* yellow). Data presented are the means of six replicates. Different letters indicate significant differences among mean values (P < 0.05; t-test). -C: untreated control; E: 200 mL/L ethanol treatment. (D)