Distinctive anthocyanin accumulation responses to temperature and natural UV radiation of two field-grown (Vitis vinifera L.) cultivars.

At harvest 2011, the variation in the proportion of anthocyanin derivatives showed a trend similar to that observed in 2009, with significantly higher proportion of delphinidin and petunidin derivatives than in 2010 in Bovale Grande, especially in Control berries, and a much lower proportion of peonidin and malvidin in all treatments as compared to 2010.

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The first model estimates TSA contents based on a single variable, the NHH, which was statistically highly significant and showed a very good fitting for Bovale Grande, with correlation (R) and determination (R 2 ) coefficients of 0.861 and 0.741, respectively.

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