Polyphenolic Compositions and Chromatic Characteristics of Bog Bilberry Syrup Wines

Molecules

Shu-Xun Liu²  Hang-Yu Yang²  Si-Yu Li¹  Jia-Yue Zhang²  Teng Li²  Bao-Qing Zhu²  Bo-Lin Zhang² 

[1] Center for Viticulture and Enology, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China;Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food science, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 10083, China;

关键词: bog bilberry syrup wine;    polyphenolic composition;    chromatic characteristics;    bottle aging;   

DOI  :  10.3390/molecules201119662

来源: mdpi

【 摘 要 】

Phenolic compounds determine the color quality of fruit wines. In this study, the phenolic compound content and composition, color characteristics and changes during 6 months of bottle aging were studied in wines fermented with bog bilberry syrup under three different pHs. The total anthocyanins and total phenols were around 15.12–16.23 mg/L and 475.82 to 486.50 mg GAE/L in fresh wines and declined 22%–31% and about 11% in bottle aged wines, respectively. In fresh wines, eight anthocyanins, six phenolic aids and 14 flavonols, but no flavon-3-ols were identified; Malvidin-3-O-glucoside, petunidin-3-O-glucoside and delphinium-3-O-glucoside were the predominant pigments; Chlorogentic acid was the most abundant phenolic acid, and quercetin-3-O-galactoside and myricetin-3-O-galactoside accounted for nearly 90% of the total flavonols. During 6 months of bottle storage, the amounts of all the monomeric anthocyanins and phenolic acids were reduced dramatically, while the glycosidyl flavonols remained constant or were less reduced and their corresponding aglycones increased a lot. The effects of aging on blueberry wine color were described as the loss of color intensity with a dramatic change in color hue, from initial red-purple up to final red-brick nuances, while the pH of the fermentation matrix was negatively related to the color stability of aged wine.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.