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

De Oliveira, Ana Fernandes and Mercenaro, Luca and Del Caro, Alessandra and Pretti, Luca and Nieddu, Giovanni (2015) Distinctive anthocyanin accumulation responses to temperature and natural UV radiation of two field-grown (Vitis vinifera L.) cultivars. Molecules, Vol. 20 , p. 2061-2080. eISSN 1420-3049. Article.

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DOI: 10.3390/molecules20022061


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.

Item Type:Article
ID Code:10778
Uncontrolled Keywords:Anthocyanin accumulation and partitioning, UV radiation, temperatures, thermal time modeling, Mediterranean climate
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/03 Arboricoltura generale e coltivazioni arboree
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > Porto Conte Ricerche, Alghero
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Copyright Holders:© 2015 by the authors; licensee MDPI, Basel, Switzerland
Deposited On:09 Feb 2015 17:10

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