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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/10209

Title: Abiotic stresses differentially affect the expression of 0-methyltransferase genes related to methoxypyrazine biosynthesis in seeded and parthenocarpic fruits of Vitis vinifera (L.)
Authors: Vallarino, JG.
Gainza-Cortes, F.
Verdugo-Alegria, C.
Gonzalez, E.
Moreno, YM.
Keywords: Vitis vinifera
Abiotic stress
Parthenocapy Methoxypyrazine
Wine flavour
Methyl transferase
Issue Date: 1-Jul-2014
Citation: FOOD CHEMISTRY Volumen: 154 Páginas: 117-126
Abstract: MPs (3-alkyl-2-methoxypyrazines) are grape-derived aroma compounds that are associated with detrimental herbaceous flavours in some wines. It is well known that several viticultural and environmental parameters can modulate MP concentrations in grapes, although comprehensive molecular studies have not been conducted in this field. Although the biosynthesis pathway of MPs has not been fully elucidated, four Vitis vinifera 0-methyltransferase genes (VvOMT1-4) have been related to be involved in MP biosynthesis. We assessed whether different abiotic stresses induction have an impact on MP levels in grapes and wines from seeded and parthenocarpic fruits. Our results show that the timing of VvOMT3 expression is associated with the period of MPs accumulation in seeded fruits during both abiotic stresses, whereas no association was found in parthenocarpic fruits. These results are discussed in the context of how different viticultural practices can modulate VvOMT gene expression, which has a direct impact on MPs levels in wines. (C) 2014 Elsevier Ltd. All rights reserved.
Description: Univ Talca, Fac Ciencias Agr, Ctr Tecnol Vid & Vino, Talca, Chile; Vallarino, JG (Vallarino, Jose G.); Verdugo-Alegria, C (Verdugo-Alegria, Claudio); Moreno, YM (Moreno, Yerko M.)
URI: http://dspace.utalca.cl/handle/1950/10209
ISSN: 1873-7072
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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