Extractability of Low Molecular Mass Flavanols and Flavonols from Red Grape Skins. Relationship to Cell Wall Composition at Different Ripeness Stages.

摘要: Flavonol and flavan-3-ol extractabilities from red grape skins were evaluated in Tempranillo grapes harvested at different ripeness stages with soluble solid contents within each stage. Flavan-3-ol extractability is related to stage also cell wall composition, mainly arabinogalactans (AG), mannans, rhamnogalacturonans-I (RG-I), homogalacturonans (HG), xyloglucans (XG), total polysaccharides content, which are negatively correlated extractability, whereas content did not exert any influence on their extraction. Moreover, procyanidin extraction more strongly composition than prodelphinidin was influenced by insoluble material contents; although some components presented a relationship flavonol the presence of AG mannans would decrease protein positively major compounds (i.e., quercetin myricetin derivatives). The behaviors observed between those two groups polyphenol could be due tissue cellular location.