Other works have described important modifications in the d- galacturonic biosynthetic pathway under dark and light conditions in ripening grape berries [34]. However, to date, no clear information exists about the regulation of the myo-inositol and l-gulose pathways in response to light. On the other hand, regarding the recycling and degradation pathways, lower APX, DHAR and MDHAR enzymatic activity and gene expression have been found in shaded apple peel [35,36] and kiwifruit [30].