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- W2521746543 abstract "<p style=text-align: justify;><strong>Aim</strong>: Polyphenol composition, an important component of grape quality, is strongly influenced by fruit microclimate. However, information relies exclusively on whole berry data and the underlying response functions to microenvironment variables remain essentially unknown. The aim of this study was therefore to analyze the biochemical composition of grapes at both bunch and berry scales, in relation with microclimate.</p><p style=text-align: justify;><strong>Methods and results</strong>: Whole berries and berry halves were sampled in mature defoliated bunches from two neighboring Bordeaux vineyards with contrasting row orientations (<em>Vitis vinifera</em> cv. Merlot). Flavonoid and amino-acid contents were analyzed by HPLC methods. The main sources of variation were bunch azimuth, berry exposure and, only in South-exposed bunches, berry side. Models were used to estimate radiation at the berry surface and temperature. Intense effects of bunch side and berry side on total flavonol and anthocyanin concentrations were observed. These results were all consistent at both bunch and berry scales. However, the most intense effects were observed at berry scale and mitigated by scaling up from berry to bunch.</p><p style=text-align: justify;><strong>Conclusion</strong>: Total flavonol concentrations in the berry skin exhibited a clear positive linear relationship with solar radiation. The large heterogeneity of composition at berry scale is consistent with the better known heterogeneity at bunch scale.</p><p style=text-align: justify;><strong>Significance and impact of the study</strong>: Models and original response functions to microclimate could help optimize vineyard management and grape ripening.</p>" @default.
- W2521746543 created "2016-09-30" @default.
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- W2521746543 date "2016-09-06" @default.
- W2521746543 modified "2023-10-18" @default.
- W2521746543 title "Nested effects of berry half, berry and bunch microclimate on biochemical composition in grape" @default.
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- W2521746543 doi "https://doi.org/10.20870/oeno-one.2016.50.3.52" @default.
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