Grapevine virus H (GVH) is a member of the genus Vitivirus in family Betaflexiviridae (subfamily Trivirinae, order Tymovirales) that infects grapevine (Candresse et al., 2018). GVH was first identified symptomless an unknown cultivar from Portugal 2018 al. 2018), and since then has been reported only California (Diaz‑Lara 2019). Several vitiviruses have detected Greek vineyards (Avgelis Roubos ...

ABSTRACT: Among phytosanitary problems of the grapevine, viruses stand out for their capacity reducing quality and yield grapes. However, detecting identifying viral infections in grapevines can be challenging. This study performed a high throughput sequencing (HTS) pathogens present vine showing virus-like symptoms to elucidate etiology. HTS analysis reported hybrid grapevine with mild curling...

The antioxidant and/or prooxidant ability of extracts obtained from wine waste were analyzed using in vitro and in vivo assays. Cyclic voltammetry was used as the in vitro assay to determine the antioxidant and/or prooxidant properties and, the in vivo effect on mycelial growth of the fungus Botrytis cinerea was evaluated. In addition, the prooxidant activity was evaluated by intracellular oxid...

Supercritical fluid extraction has been widely employed in the extraction of high purity substances. In this study, we used the technology to obtain oil from seeds from a variety of grapes, from vinification residues generated in the Southern region of the state of Rio Grande do Sul, Brazil. This work encompasses three varieties of Vitis vinifera (Moscato Giallo, Merlot, and Cabernet Sauvignon)...

The impact of increasing cold soak (CS) duration (0, 1, 4, 7, and 10 days at 10 °C) on the extraction of phenolic compounds during the CS period and primary fermentation as well as the final composition of Cabernet Sauvignon wine was investigated. The results showed that CS duration had no effect on hydroxycinnamate and flavonol extractions. Greater amounts of gallic acid, (+)-catechin, (-)-epi...

Leafroll is an economically important disease affecting grapevines (Vitis spp.). Nine serologically distinct viruses, Grapevine leafroll-associated virus-1 through 9, are associated with this disease. The present study describes the coat protein gene sequence of four GLRaV-3 isolates occurring in the São Francisco River basin, Northeastern Brazil. The viral RNA was extracted from GLRaV-3 ELISA-...

BACKGROUND The blending of wine is a common practice in winemaking to improve certain characteristics that are appreciated by consumers. The use of some cultivars may contribute phenolic compounds that modify certain characteristics in blended wines, particularly those related to mouthfeel. The aim of this work was to study the effect of Carménère, Merlot and Cabernet Franc on the phenolic comp...