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Molecules 2015, 20(2), 2061-2080; doi:10.3390/molecules20022061

Distinctive Anthocyanin Accumulation Responses to Temperature and Natural UV Radiation of Two Field-Grown Vitis vinifera L. Cultivars

1
Department of Agriculture, University of Sassari, Viale Italia 39, Sassari 07100, Italy
2
Porto Conte Ricerche Srl, S.P. 55 Porto Conte/Capo Caccia, Tramariglio-Alghero (SS) 07041, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Ronald E. Wrolstad
Received: 9 September 2014 / Accepted: 20 January 2015 / Published: 27 January 2015
(This article belongs to the Special Issue Anthocyanins)
View Full-Text   |   Download PDF [794 KB, uploaded 10 February 2015]   |  

Abstract

The responses of two red grape varieties, Bovale Grande (syn. Carignan) and Cannonau (syn. Grenache), to temperature and natural UV radiation were studied in a three-years field experiment conducted in Sardinia (Italy), under Mediterranean climate conditions. Vines were covered with plastic films with different transmittances to UV radiation and compared to uncovered controls. Light intensity and spectral composition at the fruit zone were monitored and berry skin temperature was recorded from veraison. Total skin anthocyanin content (TSA) and composition indicated positive but inconsistent effects of natural UV light. Elevated temperatures induced alterations to a greater extent, decreasing TSA and increasing the degree of derivatives acylation. In Cannonau total soluble solids increases were not followed by increasing TSA as in Bovale Grande, due to both lower phenolic potential and higher sensitivity to permanence of high temperatures. Multi linear regression analysis tested the effects of different ranges of temperature as source of variation on anthocyanin accumulation patterns. To estimate the thermal time for anthocyanin accumulation, the use of normal heat hours model had benefit from the addition of predictor variables that take into account the permanence of high (>35 °C) and low (<15 °C and <17 °C) temperatures during ripening. View Full-Text
Keywords: anthocyanin accumulation and partitioning; UV radiation; temperatures; thermal time modeling; Mediterranean climate anthocyanin accumulation and partitioning; UV radiation; temperatures; thermal time modeling; Mediterranean climate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Fernandes de Oliveira, A.; Mercenaro, L.; Del Caro, A.; Pretti, L.; Nieddu, G. Distinctive Anthocyanin Accumulation Responses to Temperature and Natural UV Radiation of Two Field-Grown Vitis vinifera L. Cultivars. Molecules 2015, 20, 2061-2080.

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