Despite the economic importance and the diffusion of grapevine cultivation worldwide, little is known about leaf chemical composition. We characterized the phenolic composition of Nebbiolo, Barbera, Pinot noir, Cabernet Sauvignon, Grenache and Shiraz (Vitis vinifera L.) healthy leaves (separating blades and veins) during the season. Quantitative and qualitative differences were found between leaf sectors and among genotypes. In healthy grapevine leaves, anthocyanins, dihydromyricetin-rhamnoside, hexosides of dihydroquercetin and dihydrokaempferol exclusively accumulated in veins. Astilbin was the only flavanonol detected in blades and the prevalent flavanonol in veins. Barbera distinguished for the lowest proanthocyanidin and the highest hydroxycinnamate content; Pinot noir for the absence of acylated-anthocyanins. Nebbiolo and Cabernet Sauvignon displayed high concentration of epigallocatechin gallate in veins. Nebbiolo leaves showed the highest concentrations of flavanonols and the widest profile differentiation. Knowledge derived from the present work is a contribution to find out leaf polyphenol potential as a part of grapevine defense mechanisms and to dissect genotype-related susceptibility to pathogens; moreover, it represents a starting point for future deepening about grapevine and vineyard by-products as a source of bioactive phenolic compounds.

Constitutive polyphenols in blades and veins of grapevine (Vitis vinifera L.) healthy leaves

Olga Kedrina
First
;
Vittorino Novello;Andrea Occhipinti;Alessandra Ferrandino
Last
2018-01-01

Abstract

Despite the economic importance and the diffusion of grapevine cultivation worldwide, little is known about leaf chemical composition. We characterized the phenolic composition of Nebbiolo, Barbera, Pinot noir, Cabernet Sauvignon, Grenache and Shiraz (Vitis vinifera L.) healthy leaves (separating blades and veins) during the season. Quantitative and qualitative differences were found between leaf sectors and among genotypes. In healthy grapevine leaves, anthocyanins, dihydromyricetin-rhamnoside, hexosides of dihydroquercetin and dihydrokaempferol exclusively accumulated in veins. Astilbin was the only flavanonol detected in blades and the prevalent flavanonol in veins. Barbera distinguished for the lowest proanthocyanidin and the highest hydroxycinnamate content; Pinot noir for the absence of acylated-anthocyanins. Nebbiolo and Cabernet Sauvignon displayed high concentration of epigallocatechin gallate in veins. Nebbiolo leaves showed the highest concentrations of flavanonols and the widest profile differentiation. Knowledge derived from the present work is a contribution to find out leaf polyphenol potential as a part of grapevine defense mechanisms and to dissect genotype-related susceptibility to pathogens; moreover, it represents a starting point for future deepening about grapevine and vineyard by-products as a source of bioactive phenolic compounds.
2018
66
42
10977
10990
anthocyanins, flavonols, hydroxycinnamic acids, flavan-3-ols, flavanonols, HPLC-DAD-UV-MS/MS, Vitis vinifera leaves.
Olga Kedrina, Vittorino Novello, Thomas Hoffmann, Johannes Hadersdorfer, Andrea Occhipinti, Wilfrid Schwab, Alessandra Ferrandino
File in questo prodotto:
File Dimensione Formato  
Kedrina et al revised JAFC 2018 post print.pdf

Open Access dal 02/10/2019

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 2.21 MB
Formato Adobe PDF
2.21 MB Adobe PDF Visualizza/Apri
Kedrina et al., 2018.pdf

Accesso riservato

Tipo di file: PDF EDITORIALE
Dimensione 10.04 MB
Formato Adobe PDF
10.04 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1679943
Citazioni
  • ???jsp.display-item.citation.pmc??? 12
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 21
social impact