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Investigating the relationship between cell wall polysaccharide composition and the extractability of grape phenolic compounds into Shiraz wines. Part II: Extractability during fermentation into wines made from grapes of different ripeness levels
RISE - Research Institutes of Sweden, Biovetenskap och material, Jordbruk och livsmedel.
Stellenbosch University, South Africa.
University of Copenhagen, Denmark.
Stellenbosch University, South Africa.
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2019 (Engelska)Ingår i: Food Chemistry, ISSN 0308-8146, E-ISSN 1873-7072, Vol. 278, s. 26-35Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study evaluated the relationship between cell wall breakdown, from Shiraz grapes harvested at three different ripeness levels and the colour and phenolics extracted during alcoholic fermentation into wines. Phenolic differences between the ripeness treatments were minimal after ¼ of the fermentation was completed. However, colour and phenolic content were significantly higher in finished wines made from 25°Brix grapes compared to those from 21°Brix and 23°Brix. Levels of grape cell wall polysaccharide deconstruction during fermentation was a determining correlative factor in relation to phenolic extractability. In this context, the de-pectination observed during ripening was found to enhance this deconstruction or “opening-up” of the grape pomace during fermentation, thus increasing the differential extraction of specific polyphenols, especially polymeric polyphenols, into the wines. Additionally, the degree of cell wall deconstruction seemed to play a role in the possible retention and extraction of specific grape proanthocyanidins, depending on their nature and polymer length.

Ort, förlag, år, upplaga, sidor
2019. Vol. 278, s. 26-35
Nyckelord [en]
Alcoholic fermentation, Cell walls, Extractability, Phenolics, Polysaccharides, Ripeness, Cells, Cytology, Extraction, Fermentation, Flavonoids, Polymers, Wine
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-36391DOI: 10.1016/j.foodchem.2018.10.136Scopus ID: 2-s2.0-85056241217OAI: oai:DiVA.org:ri-36391DiVA, id: diva2:1265225
Anmärkning

Funding details: National Research Foundation of Korea, NRF

Tillgänglig från: 2018-11-22 Skapad: 2018-11-22 Senast uppdaterad: 2018-11-22Bibliografiskt granskad

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