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Color of berry and juice of 'Isabel' grape treated with abscisic acid in different ripening stages

Abstract : The objective of this work was to evaluate the effect of (S)-cis-abscisic acid (S-ABA) application at different ripening stages, in increasing phenolic compounds and color of berry and juice of 'Isabel' grape (Vitis labrusca). The evaluated treatments were: control, without S-AB...

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Published in:Pesquisa agropecuaria brasileira 2015-12, Vol.50 (12), p.1160-1167
Main Authors: Yamamoto, Lilian Yukari, Koyama, Renata, Assis, Adriane Marinho de, Borges, Wellington Fernando Silva, Oliveira, Izadora Rodrigues de, Roberto, Sergio Ruffo
Format: Article
Language:English
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Summary:Abstract : The objective of this work was to evaluate the effect of (S)-cis-abscisic acid (S-ABA) application at different ripening stages, in increasing phenolic compounds and color of berry and juice of 'Isabel' grape (Vitis labrusca). The evaluated treatments were: control, without S-ABA application; 400 mg L-1S-ABA applied 7 days before veraison (DBV) + 400 mg L-1S-ABA at 35 days after first application (DAFA); 400 mg L-1S-ABA applied at veraison (V) + 400 mg L-1S-ABA at 35 DAFA; and 400 mg L-1S-ABA applied 7 days after veraison (DAV) + 400 mg L-1S-ABA at 35 DAFA. There was no difference among treatments regarding the physical characteristics of berries and clusters, as well as total polyphenols in berry and juice. However, there was an increase in total anthocyanins in berry and juice with S-ABA application. Colorimetric variables indicated the increase in color of berry treated with S-ABA. Juices produced from grapes treated with S-ABA were more appreciated by tasters. The treatments with 400 mg L-1S-ABA applied 7 days before, during, or 7 days after veraison, combined with an additional application 35 days after the first one, increment total anthocyanin concentration and color of berry and juice of 'Isabel' grape, with better juice acceptance, without affecting total polyphenol concentration. Resumo: O objetivo deste trabalho foi avaliar o efeito da aplicação do (S)-cis-ácido abscísico (S-ABA) em diferentes fases de maturação, no incremento de compostos fenólicos e na cor das bagas e do suco de uva 'Isabel' (Vitis labrusca). Os tratamentos avaliados foram: testemunha, sem aplicação de S-ABA; 400 mg L-1 de S-ABA aplicados 7 dias antes do "véraison" (DAV) + 400 mg L-1 de S-ABA aos 35 dias após a primeira aplicação (DAPA); 400 mg L-1 de S-ABA aplicados no "véraison" (V) + 400 mg L-1 de S-ABA aos 35 DAPA; e 400 mg L-1 de S-ABA aplicados 7 dias após o "véraison" (DAV) + 400 mg L-1 de S-ABA aos 35 DAPA. Não houve diferença entre os tratamentos para as características físicas das bagas e dos cachos, bem como para os compostos fenólicos totais das bagas e do suco. Contudo, houve incremento de antocianinas totais da baga e do suco com a aplicação de S-ABA. As variáveis colorimétricas indicaram aumento da cor das bagas quando estas foram tratadas com S-ABA. Os sucos elaborados com uvas tratadas com S-ABA foram mais apreciados pelos provadores. Os tratamentos com 400 mg L-1 de S-ABA aplicados 7 dias antes, durante ou 7 dias após o "véraison", associados à uma
ISSN:0100-204X
1678-3921
0100-204X
DOI:10.1590/S0100-204X2015001200005