Chemical Composition and Antioxidant Capacity of the Fruits of European Plum Cultivar "Čačanska Lepotica" Influenced by Different Rootstocks.

We investigated the influence of different rootstocks on the content of sugars, organic acids, and antioxidant phenolic compounds in the whole fruit and fruit skin of the European plum cultivar "Čačanska Lepotica". H NMR of the fruit extracts allowed for the identification of sucrose, α- and β-glucose, sorbitol, fructose, and malic and quinic acids, while LC-DAD-ESIMS showed the presence of neochlorogenic and chlorogenic acids, cyanidin-3--glucoside, cyanidin-3--rutinoside, peonidin-3--glucoside, peonidin-3--rutinoside, hyperoside, isoquercitrin, rutin, and unidentified quercetin-3-diglycoside. The quantitation of the sugars, malic and quinic acids by H NMR and phenolic compounds by HPLC-DAD revealed that the rootstock significantly influenced the content of the individual compounds in the fruit skin and fruit.