Estudios científicos

Polyphenol Profiles of just pruned Grapevine Canes from wild Vitis accessions and V. vinifera cultivars.


Grapevine canes are an abundant byproduct of the wine industry. The stilbene contents of Vitis vinifera cultivars have been largely studied, but little is known about the stilbene contents of wild Vitis accessions. Moreover, there have only been few studies on the quantification of other phenolic compounds in just pruned grapevine canes. In our study, we investigated the polyphenol profile of 51 genotypes belonging to 15 Vitis spp. A total of 36 polyphenols (20 stilbenes, 6 flavanols, 7 flavonols, and 3 phenolic acids) were analyzed by high-performance liquid chromatography coupled with a triple quadrupole mass spectrometer. Our results suggest that some wild Vitisaccessions could be of interest in terms of the concentration of bioactive polyphenols and that flavanols contribute significantly to the antioxidant activity of grapevine cane extracts. To the best of our knowledge, this is the most exhaustive study of the polyphenolic composition of grapevine canes of wild Vitis spp.

Comentarios divulgativos:

En este estudio, los investigadores analizan primera vez de forma pormenorizada la composición en polifenoles de los sarmientos recién podados de las viñas y su potencial antioxidante. Los sarmientos son un importante subproducto de la industria vitivinícola.

Encontraron que había una gran variabilidad en la composición en polifenoles entre los diferentes sarmientos. Los científicos identificaron en total 36 compuestos polifenólicos (20 estilbenos, 6 flavanoles, 7 flavonoles y 3 ácidos fenólicos) y estimaron su potencial antioxidante. Además, desarrollaron un modelo que permitía identificar los extractos más ricos en compuestos fenólicos antioxidantes.