Post-veraison trimming slow down sugar accumulation without modifying phenolic ripening in Sangiovese vines.
anthocyanin
phenolic maturity
source limitation
tannin
technological maturity
Journal
Journal of the science of food and agriculture
ISSN: 1097-0010
Titre abrégé: J Sci Food Agric
Pays: England
ID NLM: 0376334
Informations de publication
Date de publication:
Feb 2019
Feb 2019
Historique:
received:
28
12
2017
revised:
05
07
2018
accepted:
06
08
2018
pubmed:
11
8
2018
medline:
21
3
2019
entrez:
11
8
2018
Statut:
ppublish
Résumé
Vineyard strategies have recently been developed to combat the effects of global warming on grapevines, which is causing grapes to ripen quickly, excessive sugar accumulation in berries, and high alcohol levels in wines. We evaluate the effectiveness of post-veraison trimming as a means of slowing down sugar accumulation, without modifying phenolic ripening, in Sangiovese vines grown in highly fertile and well watered soil. The removal of about two-thirds of the leaf area by shoot trimming after veraison led to a reduction in sugar content without affecting yield. Total and extractable anthocyanins, skin, and seed tannins showed no significant variation at harvest after the treatment during the three-year trial, while the replenishment of carbohydrates in canes at the end of the trial was negatively affected. These results indicate that, in highly fertile and well-watered soil, post-veraison trimming may represent a powerful tool for decreasing sugar concentration during harvest without affecting yield or total and extractable phenolic compounds. However, the reduction in starch reserves compared to the control serves as a warning about repeated trimming over the years. © 2018 Society of Chemical Industry.
Sections du résumé
BACKGROUND
BACKGROUND
Vineyard strategies have recently been developed to combat the effects of global warming on grapevines, which is causing grapes to ripen quickly, excessive sugar accumulation in berries, and high alcohol levels in wines. We evaluate the effectiveness of post-veraison trimming as a means of slowing down sugar accumulation, without modifying phenolic ripening, in Sangiovese vines grown in highly fertile and well watered soil.
RESULTS
RESULTS
The removal of about two-thirds of the leaf area by shoot trimming after veraison led to a reduction in sugar content without affecting yield. Total and extractable anthocyanins, skin, and seed tannins showed no significant variation at harvest after the treatment during the three-year trial, while the replenishment of carbohydrates in canes at the end of the trial was negatively affected.
CONCLUSIONS
CONCLUSIONS
These results indicate that, in highly fertile and well-watered soil, post-veraison trimming may represent a powerful tool for decreasing sugar concentration during harvest without affecting yield or total and extractable phenolic compounds. However, the reduction in starch reserves compared to the control serves as a warning about repeated trimming over the years. © 2018 Society of Chemical Industry.
Substances chimiques
Anthocyanins
0
Phenols
0
Sugars
0
Tannins
0
Types de publication
Evaluation Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1358-1365Subventions
Organisme : Italian Ministry for University
Informations de copyright
© 2018 Society of Chemical Industry.