首页|Sugars and total phenolic contents in different fractions of autochthonous grape varieties grown in Tunisia. (Special Issue: Tunisian fruit and vegetables.)
Sugars and total phenolic contents in different fractions of autochthonous grape varieties grown in Tunisia. (Special Issue: Tunisian fruit and vegetables.)
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NSTL
Grapes (Vitis vinifera L.) is one of the economically important fruit in the world and the important quality determining parameters of it are sweetness related compounds and antioxidants. In this experiment, reducing, sugar, total sugar and phenolic contents were quantified in different parts (peel, pulp, and seeds) of 15 grape varieties: ('Muscat de RafRaf', 'Rafrafi', 'Boukhasla', 'Farrani', 'Bith El H'mem', 'Hammemi', 'Kohli', 'Chaaraoui', 'Vieux Beldi', 'Razzegui', 'Farranah', 'Bith El H'mem Rose', 'Essifi', 'Marsaoui' and 'Bezoul El Khadem'). Significant differences were found between grape varieties within different parts in total sugar, reducing sugar and phenolic contents. 'Muscat de RafRaf' variety showed the highest amount of total sugar (12.28 g 100 g<sup>-1</sup>FW), reducing sugar (7.43 g 100 g<sup>-1</sup>FW) and phenolic contents (28.33 mg EAG g<sup>-1</sup> FW). The pulp of grapes showed high reducing and total sugar contents. The total phenolic content varied between 0.47 and 80.93 mg EAG g<sup>-1</sup> FW. Seeds had a greater phenolic compound content, between 18.09 and 80.93 mg EAG g<sup>-1</sup>FW, which was higher than those of other fruit parts.
NSTL
