Physical and biochemical traits of selected grape varieties cultivated in Tekirdağ, Turkey

Abstract

This research was performed during the 2014 growing season for determining some physical and biochemical properties of eight different grape varieties, including Red Globe, Michele Palieri, Balbal, Antep Karasi, Alphonse Lavallee, Pembe Gemre, Ozbek, Efes Karasi grown in Tekirdag province of Turkey. In the study, grape length, grape width, grape weight, grape firmness, cluster length, cluster width and cluster weight were measured as physical properties and total soluble solids content, titratable acidity, pH, total phenolic content, total anthocyanin content and total tannin content in the juice of grape varieties were evaluated as the biochemical properties. The study results shown that grape weight means varied from 3.3 (Pembe Gemre variety) to 12.9 g (Red Globe variety), cluster weight ranged from 232 (Balbal variety) to 863.2 g (Red Globe variety) and grape firmness changed from 367.5 (Efes Karasi variety) to 855 g mm–1 (Michele Palieri variety). Research data demonstrated that biochemical properties of grape varieties varied highly among the grape varieties. Total phenolic content means were between 103.62 (Balbal variety) and 314.55 mg GAE 100 g–1 (Alphonse Lavallee variety), total anthocyanin content means were between 19.92 (Ozbek variety) and 91.22 mg 100 g–1 (Efes Karasi variety) and total tannin content means were between 10.62 (Balbal variety) and 62 mg 100 g–1 (Alphonse Lavallee variety).