ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Anthocyanins profile, total phenolics and antioxidant activity of two Romanian red grape varieties: Feteascǎ neagrǎ and Bǎbeascǎ neagrǎ (Vitis vinifera)

Oana Emilia Constantin, Mihaela Skrt, Natasa Poklar Ulrih, and Gabriela Râpeanu

Faculty of Food Science and Engineering, University “Dunărea de Jos” of Galaţi, Department of Food Science and Engineering and Applied Biotechnology, Domnească 111, 800201 Galaţi, Romania

E-mail: Gabriela.Rapeanu@ugal.ro

Abstract: The phenolic composition of Fetească neagră and Băbească neagră grapes from Dealul Bujorului vineyard (south-east Romania) was studied using the spectrophotometric and high-performance liquid chromatographic (HPLC) methods. The results revealed significant differences between these cultivars. Total anthocyanins ranged from 0.22-5.98 mg g⁻¹ DW berries in Băbească neagră grapes to 0.54-18.54 mg g^-1 DW berries in Fetească neagră. Both cultivars were characterised by an interesting anthocyanin profile for winemaking with a prevalence of malvidin-3-glucoside. The skins and seeds both had small amounts of flavonoids. In contrast with Băbească neagră, Fetească neagră had more flavonoids in the seeds (69 %) than in the skins. Statistically significant correlations were observed between antioxidant activity and total anthocyanin content in both varieties. The antioxidant activity was also found to be highly correlated to the total phenolic compounds content.

Keywords: red grapes – anthocyanins – phenolic acids – antioxidant activity

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0163

Chemical Papers 69 (12) 1573–1581 (2015)