Water deficit had no significant effect on the composition and polymerization of grape seed tannins.

drought · quality: phytochemicals · Vitis vinifera (wine grape)Positive and negative results

2 papers in the same direction as this claim · 14 in the opposite direction

1. positive
   Water limitation, especially before veraison, substantially increased skin anthocyanin concentration independently of berry size and vigor reductions.

   Irrigation and Rootstock Effects on the Phenolic Concentration and Aroma Potential of Vitis vinifera L. cv. Cabernet Sauvignon Grapes · 2009

   Opposite directionCites this paper

2. positive
   Early water deficit during the growth period had beneficial effects on the concentration of anthocyanins and total phenolics in berry skins.

   Influence of Vineyard Location and Vine Water Status on Fruit Maturation of Nonirrigated Cv. Agiorgitiko (Vitis viniferaL.). Effects on Wine Phenolic and Aroma Components · 2006

   Opposite direction

3. positive
   Water deficit increased berry and wine anthocyanins and tannins.

   Effect of water deficit and severe shoot trimming on the composition ofVitis vinifera L. Merlot grapes and wines · 2015 · compared with irrigated

   Opposite direction

4. positive
   Water-stressed Merlot grapes produced wines with higher anthocyanin concentrations than fully irrigated grapes.

   From grape berries to wines: drought impacts on key secondary metabolites · 2020 · compared with Fully irrigated

   Opposite direction

5. positive
   Particle film combined with mild water deficit gave the greatest net anthocyanin increase under study conditions.

   Kaolin Particle Film and Water Deficit Influence Red Winegrape Color under High Solar Radiation in an Arid Climate · 2013

   Opposite direction

6. positive
   Water deficit increased grape anthocyanin concentration per berry fresh weight.

   Response of Grape and Wine Phenolic Composition in Vitis vinifera L. cv. Merlot to Variation in Grapevine Water Status · 2016

   Opposite direction

7. positive
   Both post-veraison water deficits increased anthocyanin concentration, especially tri-substituted forms.

   Berry flavonoids are differently modulated by timing and intensities of water deficit in Vitis vinifera L. cv. Sangiovese · 2022 · compared with full irrigation during the entire irrigation period (FI)

   Opposite direction

8. positive
   Water shortage increased berry anthocyanins in both varieties.

   Relating Water Deficiency to Berry Texture, Skin Cell Wall Composition, and Expression of Remodeling Genes in Two Vitis vinifera L. Varieties · 2015

   Opposite direction

8 papers more in this group