Caracterização de compostos bioativos em uva da cultivar Isabel precoce (Vitis labrusca L.) durante o desenvolvimento fisiológico, cultivada no cerrado goiano
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2018-08-29
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Universidade Federal de Goiás
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The grape stands out among fruits and vegetables as one of the largest sources of phenolic
compounds. Thus, the objective of this work was to evaluate the content of biocomposites in the
early Isabel cultivar during physiological development. The cycle comprised a 90 days after
anthesis (DAA). There was a decrease in acidity, increase in pH and soluble solids, and change in
fruit staining with significant variations at 60 DAA. The content of phenolic compounds presented
higher contents for seeds during maturation (60-90 DAA) followed by berry, skin and pulp. The
seeds presented better antioxidant activity during all maturation times, by the DPPH and
Phosphomolybdenum methods, and ABTS at 60 DAA. The berries presented better antioxidant
activity at 10 DAA for the three evaluated methods (DPPH, ABTS and Phosphomolybdenum). In
the skin, the antioxidant activity by the ABTS assay presented higher levels from 70 DAA. The
pulp was the tissue that presented lower contents of total phenolic compounds and antioxidant
activity in comparison with the others. Of the individual phenolic compounds, three chlorogenic
acids were present in the berries (10 to 50 DAA), peels and pulps (60 to 90 DAA), and catechin
and epicatechin in the seeds (60 to 90 DAA), all of which presented significant reduction
throughout development of the fruit.
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PÁDUA, D. R. L. Caracterização de compostos bioativos em uva da cultivar Isabel precoce (Vitis labrusca L.) durante o desenvolvimento fisiológico, cultivada no cerrado goiano. 2018. 68 f. Dissertação (Mestrado em Ciência e Tecnologia de Alimentos) - Universidade Federal de Goiás, Goiânia, 2018.