Changes in Tannin Composition of Syrah Grape Skins and Seeds during Fruit Ripening under Contrasting Water Conditions.

Considering tannin seasonal pattern, a decreasing trend during berry ripening was highlighted for skin TT concentration and content in both years ( p < 0.001 for 2011 and p < 0.01 for 2012), similarly to previous studies [ 5 , 37 ].

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[ 35 ] found an increasing trend of skin tannins with irrigation.

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This observation was further strengthened by a highly significant positive correlation (Pearson’s correlation coefficient 0.90) between Ψ d at veraison and harvest and seed TT at harvest in 2012 ( Supplemental Table S2 ).

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