So far, the evaluation of the phyto

So far, the evaluation of the phytochemical composition and biological activity of vinification residues has been focused in grape seeds, peels and pulp considered as independent materials or making part of grape pomace. The information recorded concerning these materials has encouraged the evaluation of additional residues as a source of valuable antimicrobial compounds, among other biological activities, that might be applied on food protection (Ahmad et al., 2014, Cheng et al., 2012, Han, 2007 and Jayaprakasha et al., 2003; Oliveira et al., 2013). In this sense, information available on the phytochemical composition and biological activity of grape stems continue being scarce because of this material was not considered a direct residue of the industrial process (vinification) but a side material of the wine-making activity (Teixeira et al., 2014).