Carotenoid Profile in Grapes Related to Aromatic Compounds in Wines from Douro Region

Authors

  • Carla Oliveira,

    1. Authors Oliveira, Barbosa, Ferreira, Guedes de Pinho are with Escola Superior de Biotecnologia, Univ. Catolica Portuguesa, R. Dr. Antonio Bernardino de Almeida 4200-072 Porto, Portugal. Author Guerra is with Direccao Regional de Agricultura de Tras-os-Montes, Mirandela, Portugal. Direct inquiries to author Guedes de Pinho (E-mail: pinho@esb.ucp.pt).
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  • Antonina Barbosa,

    1. Authors Oliveira, Barbosa, Ferreira, Guedes de Pinho are with Escola Superior de Biotecnologia, Univ. Catolica Portuguesa, R. Dr. Antonio Bernardino de Almeida 4200-072 Porto, Portugal. Author Guerra is with Direccao Regional de Agricultura de Tras-os-Montes, Mirandela, Portugal. Direct inquiries to author Guedes de Pinho (E-mail: pinho@esb.ucp.pt).
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  • A. C. Silva Ferreira,

    1. Authors Oliveira, Barbosa, Ferreira, Guedes de Pinho are with Escola Superior de Biotecnologia, Univ. Catolica Portuguesa, R. Dr. Antonio Bernardino de Almeida 4200-072 Porto, Portugal. Author Guerra is with Direccao Regional de Agricultura de Tras-os-Montes, Mirandela, Portugal. Direct inquiries to author Guedes de Pinho (E-mail: pinho@esb.ucp.pt).
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  • Joaquim Guerra,

    1. Authors Oliveira, Barbosa, Ferreira, Guedes de Pinho are with Escola Superior de Biotecnologia, Univ. Catolica Portuguesa, R. Dr. Antonio Bernardino de Almeida 4200-072 Porto, Portugal. Author Guerra is with Direccao Regional de Agricultura de Tras-os-Montes, Mirandela, Portugal. Direct inquiries to author Guedes de Pinho (E-mail: pinho@esb.ucp.pt).
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  • Paula Guedes DE Pinho

    1. Authors Oliveira, Barbosa, Ferreira, Guedes de Pinho are with Escola Superior de Biotecnologia, Univ. Catolica Portuguesa, R. Dr. Antonio Bernardino de Almeida 4200-072 Porto, Portugal. Author Guerra is with Direccao Regional de Agricultura de Tras-os-Montes, Mirandela, Portugal. Direct inquiries to author Guedes de Pinho (E-mail: pinho@esb.ucp.pt).
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Abstract

ABSTRACT The aim of this work was to characterize 8 representative grape varieties of the Douro Region using the carotenoid profile as it relates to aromatic compounds in the respective wines. Some other analyses, such as the determination of sugar, probable alcohol, pH, and total acidity, were also performed in an attempt to understand in which way the evaluated characteristics influenced by grape variety could contribute to the wine aroma. For the 3 y of the study, grape varieties with higher concentrations of carotenoids (Touriga Femea, Tinta Amarela, and Tinta Barroca) have lower values of free norisoprenoids, even with exceptions (Touriga Femea). Conversely, grape varieties with lower concentrations of carotenoids (Touriga Nacional, Sousao, and Tinto Cao) appear to have higher contents of free norisoprenoids, namely b-ionone for Touriga Nacional and vitispirane and 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN) for Sousao and Tinto Cao. Touriga Nacional, followed by Touriga Femea, was the wine variety with the highest values of total free terpenols (linalol, a-terpineol, nerol, and geraniol), the presence of which is responsible for the floral aroma.

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