Abstract
Stilbenes are natural compounds occurring in a number of plant families, including Vitaceae and (within this family) Vitis vinifera L., which is the most important species grown worldwide for grape and wine production. Stilbenes (resveratrol and viniferins) are present in grapevine as constitutive compounds of the woody organs (roots, canes, stems) and as induced substances (in leaves and fruit) acting as phytoalexins in the mechanisms of grape resistance against certain pathogens. Resveratrol (3, 5, 4'-trihydroxystilbene) was also detected in wine and it was thought to be the active principle of red wines that were shown to reduce heart diseases. This paper reviews data, obtained by the Viticulture Institute of the Catholic University at Piacenza and taken from the literature, on some aspects of stilbene physiology in grapevine and on their relation to resveratrol wine levels. Constitutive stilbene contents of woody organs are reported, as well as the possible role of cluster stems as a source of resveratrol for wine. The accumulation of stilbenes in grape berries infected by grey mould (Botrytis cinerea Pers.) has been investigated and the effects of environmental factors on resveratrol grape and wine levels will be discussed. An unidentified new hydroxystilbene was detected in wine.
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Claims 4
Claim · model-written summary
Stilbenes occur constitutively in grapevine woody organs.
- Organ / stage
- woody organs (roots, canes, stems)e0
- Outcome
- Stilbenes (resveratrol and viniferins) are presente0
- Qualifier
- constitutive compoundse0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stilbenes (resveratrol and viniferins) are present in grapevine as constitutive compounds of the woody organs (roots, canes, stems) and as induced substances (in leaves and fruit) acting as phytoalexins in the mechanisms of grape resistance against certain pathogens.”
Claim · model-written summary
Stilbenes are induced in grapevine leaves and fruit as phytoalexins against pathogens.
- Organ / stage
- leaves and fruite0
- Outcome
- induced substancese0
- Qualifier
- acting as phytoalexins in the mechanisms of grape resistance against certain pathogense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stilbenes (resveratrol and viniferins) are present in grapevine as constitutive compounds of the woody organs (roots, canes, stems) and as induced substances (in leaves and fruit) acting as phytoalexins in the mechanisms of grape resistance against certain pathogens.”
Claim · model-written summary
The review reports constitutive stilbene content in woody grapevine organs.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Constitutive stilbene contents of woody organs are reported, as well as the possible role of cluster stems as a source of resveratrol for wine.”
t0“grapevine”
Claim · model-written summary
Cluster stems may supply resveratrol to wine.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Constitutive stilbene contents of woody organs are reported, as well as the possible role of cluster stems as a source of resveratrol for wine.”
t0“grapevine”