Figure 2.

Mean and standard error of means (SEM) of relative transcript levels as fold changes of several genes involved in the antioxidant system in the liver of broilers fed the four experimental diets (Control; CON, ground grape pomace; GGP, dried wine lees; WYC, and extract from grape stems included in soluble starch; PE). Bars with different superscript (a, b) between dietary treatments differ significantly (p ≤ 0.05) according to the analysis of variance (ANOVA) using post hoc multiple range test when appropriate.