“…Grape and wine anthocyanin content has been related to many agronomical factors such as variety, soil, climate, fertilization, training systems and summer pruning techniques . However, it is generally accepted that the manipulation of water availability through irrigation is the single most important management factor in determining berry and wine phenolic composition, especially in warm areas .…”
Section: Introductionmentioning
confidence: 99%
“…12 Although analytical in vitro methods have demonstrated the anticancer activity of anthocyanins, epidemiological studies have not revealed such protective effects and thus their in vivo role remains questionable. 13 Grape and wine anthocyanin content has been related to many agronomical factors such as variety, 14 soil, 15 climate, 16 fertilization, 17 training systems 18,19 and summer pruning techniques. 20,21 However, it is generally accepted that the manipulation of water availability through irrigation is the single most important management factor in determining berry and wine phenolic composition, 10 especially in warm areas.…”
Irrigation proved to be an effective technique to control anthocyanin content in Syrah grapes under semiarid conditions. However, anthocyanin accumulation pattern should be considered by winemakers to appropriately select harvest time for improved wine colour.
“…Grape and wine anthocyanin content has been related to many agronomical factors such as variety, soil, climate, fertilization, training systems and summer pruning techniques . However, it is generally accepted that the manipulation of water availability through irrigation is the single most important management factor in determining berry and wine phenolic composition, especially in warm areas .…”
Section: Introductionmentioning
confidence: 99%
“…12 Although analytical in vitro methods have demonstrated the anticancer activity of anthocyanins, epidemiological studies have not revealed such protective effects and thus their in vivo role remains questionable. 13 Grape and wine anthocyanin content has been related to many agronomical factors such as variety, 14 soil, 15 climate, 16 fertilization, 17 training systems 18,19 and summer pruning techniques. 20,21 However, it is generally accepted that the manipulation of water availability through irrigation is the single most important management factor in determining berry and wine phenolic composition, 10 especially in warm areas.…”
Irrigation proved to be an effective technique to control anthocyanin content in Syrah grapes under semiarid conditions. However, anthocyanin accumulation pattern should be considered by winemakers to appropriately select harvest time for improved wine colour.
“…The choice of the vine training system, i.e. the arrangement of vine organs in space with the use of an adapted trellis, is one the major techniques applied by grape growers to influence source-sink relationships and fruit-zone microclimate, with the aim to control grape maturity and composition (González-Neves et al, 2004;Reynolds et al, 2004;Pérez Lamela et al, 2007;Reynolds et al, 2009;Río Segade et al, 2009;Mota et al, 2011). In previous studies it was reported that the phenolic composition of grapes and wines differed between vertical shoot positioned (VSP) and divided canopy systems (Katerji et al, 1994;González-Neves et al, 2004;Pérez Lamela et al, 2007;Río Segade et al, 2009) and also among VSP systems (Río Segade et al, 2009).…”
Aims:In order to investigate the effect of vine training system on grape phenolic composition, a divided canopy system (Lyre) and a vertical shoot positioned trellis with two different pruning systems (Royat and Guyot) were applied in a commercial vineyard of cv. Xinomavro (Vitis vinifera L.). Methods and results: Monomeric anthocyanins, flavan-3ol monomers and oligomers, tannin mean degree of polymerization (mDP), galloylation percentage (%G), and extension and terminal subunit structure were determined in seeds and skins by HPLC and LC/MS. Total phenolics, anthocyanin content, tannin concentration and antioxidant activity were measured in whole berries. Grapes and wines of the Lyre system were characterized by increased concentration of total and individual anthocyanins and total phenols. Individual flavan-3-ol monomers and oligomers were highest in Royat grape skins and Guyot seeds. Concerning proanthocyanidin structure, Royat grapes had significantly higher mDP and lower %G in skin and seed polymeric tannin fractions, compared to the other two systems, possibly leading to a lower grape astringency potential. Conclusion: Training system may affect grape anthocyanin concentration, total flavan-3-ol content as well as skin and seed proanthocyanidin structure. Significance and impact of the study: The results of the present study could be of high importance to both grape growers and winemakers. Xinomavro grapes are rather poor in anthocyanins while being characterized by dry and astringent tannins. By adopting Lyre as a training system, higher anthocyanin contents could be achieved in grapes, resulting in wines with more attractive colour when adopting a longer pre-fermentation skin contact process. On the contrary, grapes of the Royat system might be more appropriate to produce full-bodied wines with higher ageing potential, due to their more appropriate tannin structure, by using longer maceration periods. , mean degree of polymerization, percentage of galloylation Lyre, les producteurs de Xinomavro pourraient obtenir des raisins et des vins plus riches en couleur, et les valoriser par l'application d'une macération préfermentaire prolongée. Au contraire, les raisins issus du cordon Royat pourraient être plus appropriés pour la production des vins structurés, avec un potentiel élevé de vieillissement, en raison de leur structure tannique plus favorable.
Abstract Résumémanuscript
“…A videira apresenta uma grande diversidade de arquitetura de seu dossel vegetativo e das partes perenes, constituindo os diferentes sistemas de condução encontrados. Os sistemas de condução, além de influenciar na ecofisiologia da planta (FAVERO et al 2010, NISHIOKA & MIZUNAGA 2011, pode afetar a produtividade do vinhedo (HERNANDES et al 2013, PEDRO JUNIOR et al 2013), a qualidade da uva (MOTA et al 2011, PALLIOTTI 2012, as características sensoriais e fenólicas dos vinhos (SEGADE et al 2009, FRAGASSO et al 2012) e a epidemiologia de doenças (BEM et al 2016, BEM et al 2017.…”
O objetivo deste trabalho foi comparar o efeito de diferentes sistemas de condução na eficiência vegetoprodutiva e composição química da variedade Cabernet Sauvignon cultivada no Sul do Brasil. O experimento foi conduzido nas safras 2011, 2012 e 2013 em um vinhedo experimental localizado no munícipio de Lages, Santa Catarina. O vinhedo foi implantado em 2007 com a variedade copa enxertada sobre o porta-enxerto Paulsen 1103 e espaçamento de 3,0 m entre linhas e 1,2 m entre plantas. Os tratamentos consistiram em quatro sistemas de condução: cortina dupla ("Geneva Double Cortine"-GDC), latada descontínua, cortina simples e espaldeira. As variáveis foram submetidas à análise de variância (ANOVA) e comparados pelo Teste Tukey a 5% de probabilidade de erro. Observou-se que os sistemas de condução alteram a produtividade e a composição químicas das bagas da videira Cabernet Sauvignon. Os sistemas GDC e latada descontínua aumentam a produtividade, além de propiciar melhor equilíbrio vegeto-produtivo e resultam em uvas com menor acidez.
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