ABSTRACT
Tannat is a Vitis vinifera cultivar with typically high phenolic compound contents, showing intense coloration, well-bodied, and great aging potential. However, even with this great potential, this variety is still commercially underexplored in the Sub-middle São Francisco Valley (SSFV). This work aimed to characterize the typicity of Tannat red wines from Sub-middle São Francisco Valley (SSFV), Brazil. In addition, the present work represents the first study featuring phenolic compounds quantification and antioxidant activity of Tannat in tropical climate wine-producing regions. Considering the condition of a short-applied maceration time during the winemaking, the tropical Tannat wine showed significant antioxidant activity and high phenolic contents. Trans-caftaric, malvidin-3-O-glucoside, and procyanidin B1 stood out among the phenolic compounds quantified, presenting Tannat with the potential to be an important grape variety to tropical wine-producing regions in Brazil, containing high contents of bioactive compounds. Previously results to compounds (-)-epigallocatechin gallate, procyanidin B2, quercetin-3-ß-D-glucoside, pelargonidin-3-O-glucoside, chlorogenic acid, and piceatannol were not found in Tannat wines. Further studies are necessary to make the Tannat grape's adaptation better in tropical climate conditions, including investigating the phenolic profile and antioxidant activity of Tannat red wines with longer maceration times during the winemaking.
ABSTRACT
ABSTRACT: The objective of this study was to evaluate the productive performance and physicochemical characteristics of 'BRS Magna' and 'Isabel Precoce' grapes influenced by two types of pruning. The experiment was carried out during two growing seasons in a commercial vineyard of Petrolina, PE, in the period 2013-2014. Treatments were represented by two cultivars, 'Isabel Precoce' and 'BRS Magna', and two types of pruning, with selection during plant formation (P1) and without selection (P2) of lateral branches, using a randomized experimental block design, in subdivided plots and four replicates. After pruning P2, the amount of buds kept on vines was greater than after pruning P1, favoring an increase in yield. However, the sizes of bunches and berries, content of soluble solids, and titratable acidity were not influenced by the pruning type. In general, the sizes of bunches and berries in 'BRS Magna' were larger than in the 'Isabel Precoce' cultivar. Conversely, content of soluble solids and titratable acidity varied among cultivars as a function of production cycle and type of pruning; however, within the standards described for both cultivars and accepted by the Brazilian legislation.
RESUMO: O presente trabalho teve como objetivo estudar o desempenho produtivo e características físico-químicas das uvas 'BRS Magna' e 'Isabel Precoce' submetidas a dois tipos de poda. Um experimento foi realizado durante dois ciclos de produção, nos anos de 2013 e 2014, em um vinhedo comercial em Petrolina, PE. Os tratamentos foram representados por duas cultivares copa, 'Isabel Precoce' e 'BRS Magna', e dois tipos de poda, com seleção de ramos laterais na formação da planta (P1) e sem seleção de ramos laterais (P2), utilizando delineamento experimental em blocos ao acaso em parcelas subdivididas e quatro repetições. A quantidade de gemas mantidas na videira após a poda é mais elevada na poda P2, favorecendo o aumento da produtividade, mas o tamanho dos cachos e das bagas e o teor de sólidos solúveis e acidez titulável não foram influenciados pelo tipo de poda. O tamanho dos cachos e das bagas da cultivar 'BRS Magna' é, de modo geral, maior que os de 'Isabel Precoce'. Por outro lado, o teor de sólidos solúveis e acidez titulável variaram entre as cultivares em função do ciclo de produção e do tipo de poda, estando dentro dos padrões descritos para ambas cultivares e aceitos pela legislação brasileira.
ABSTRACT
O presente trabalho teve como objetivos avaliar o comportamento agronômico da cultivar de uva de mesa sem sementes Sugraone sobre quatro porta-enxertos nas condições do Submédio do Vale do São Francisco. O experimento foi conduzido em um vinhedo comercial no município de Sento Sé-BA durante quatro ciclos de produção (2002 à 2004), em sistema de condução do tipo latada e irrigação por gotejamento. Os tratamentos consistiram de quatro cultivares de porta-enxerto ('Paulsen 1103', 'SO4', 'Harmony' e '420A'), utilizando-se delineamento experimental em blocos ao acaso. Foram obtidas maiores produções por planta e vigor vegetativo sobre o porta-enxerto 'Paulsen 1103'. Também observou-se uma tendência de maior massa de cachos, massa e tamanho de bagas sobre este porta-enxerto, embora tenham ocorrido variações entre os ciclos de produção. O porta-enxerto exerceu influência sobre o teor de sólidos solúveis totais, mas não afetou a acidez total e a relação SST/ATT dos frutos.
The present work aimed to evaluate the agronomic performance of the seedless grape cultivar Sugraone on four rootstocks in the São Francisco Valley. The trial was carried out in a commercial vineyard in Sento Sé, State of Bahia for four seasons (2002 to 2004). The treatments were four cultivars of rootstock ('Paulsen 1103', 'SO4', 'Harmony' and '420A'), using a randomized block design. The highest yield per plant and vegetative vigor were obtained on the rootstock Paulsen 1103. Also there was a tendency for higher mass of bunches, mass and size of berries on the same rootstock, although there were variations between seasons. The rootstock showed positive influence on the content of soluble solids, but did not affect the total acidity and TSS/TA. Young plants of grapevine cv. Sugraone showed good agronomic performance on Paulsen 1103, but it is important to continue the studies for a larger number of years to recommend their use in the São Francisco Valley.
