Vine description, berry chemical characteristics and phenolic compounds of newly registered foxy grape (VitislabruscaL.) cultivars in Turkey

摘要

This study was conducted between 2014 and 2016 in order to determine the phenological, morphological and berry characteristics of five Turkish foxy grape (Vitis labrusca L.) cultivars ('Rizessi', 'Rizpem', 'Rizellim', 'Ulkemiz', and 'Celiksu') newly registered. Bunch weight, berry weight, TSS, titratable acidity and total phenolic compounds of berry samples were determined. Berry samples were collected from 10-year-old grapevines at large unripe, veraison, 50% coloring, harvest time, and overripe period. Ampelographic description followed OIV norms. 'Ulkemiz' had a wide-open shoot tip and others had it fully open. 'Ulkemiz' had green young leaf with anthocyanin color while 'Rizpem' had light copper-red ones and other cultivars have yellow green. AHcultivars had fully developed sexual organs, small bunch size and medium bunch shape. It was observed that the weight of berry at harvest time ranged between 3.20 g ('Rizpem') and 3.93 g ('Celiksu'). Berry weight and TSS continue to increase to the overripe period. Berry skin color of 'Rizpem' was dark red-violet and others were blue-black. The berry flesh of each cultivar was colorless and contained several seeds. Total phenolic compounds decreased during the maturation. 'Rizpem' gave the highest total phenolics (4116.53 mg kg1) at harvest time while it had the 7666.33 mg kg1 total phenolics at large unripe period.