Abstract
Main flavonols in grape are myricetin, quercetin and kaempferol present in glucoside and
glucuronide forms [1]. Recently, also laricitrin, isorhamnetin and syringetin glucoside,
galactoside and glucuronide were found [2]. In general, they are antioxidant compounds
contained in dietary plants used for human nutrition [3].
A “suspect screening analysis” method by high-resolution mass spectrometry to study grape
metabolomics was developed [4]. By this approach, three new p-coumaroyl flavonoids were
putatively identified in Raboso Piave grape extract. Compounds were identified by overlapping
various analytical methods according to recommendations in the MS-based metabolomics:
accurate mass measurement provided the structural characterization of functional groups and
literature data their probable position in the molecule. Compounds identified are a
dihydrokaempferide-3-O-p-coumaroylhexoside-like flavanone, isorhamnetin-3-O-pcoumaroylglucoside,
and a chrysoeriol-p-coumaroylhexoside-like flavone (Figure 1) [5].
In the present work, the study of these compounds was extended to other red grape varieties to
evaluate their use as varietal markers. Correlation between p-coumaroyl derivatives and the
anthocyanins was also studied to investigate the existence of possible common biosynthetic
pathways.
Lingua originale | English |
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Titolo della pubblicazione ospite | 38th World Congress of Vine and Wine |
Pagine | 276-277 |
Numero di pagine | 2 |
Stato di pubblicazione | Pubblicato - 2015 |
Evento | 38th World Congress of Vine and Wine - Mainz am Rhein Durata: 5 lug 2015 → 10 lug 2015 |
Convegno
Convegno | 38th World Congress of Vine and Wine |
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Città | Mainz am Rhein |
Periodo | 5/7/15 → 10/7/15 |
Keywords
- LC/QTOF Mass Spectrometry
- flavonols