Early ripening in grape (Vitis vinifera L.) is a crucial agronomic trait. The fruits of the grape line 'Summer Black' (SBBM), which contains a bud mutation, can be harvested approximately one week earlier than the 'Summer Black' (SBC)control. To investigate the molecular mechanism of the bud mutation related to early ripening, we detected genome-wide genetic variations based on re-sequencing. I...

Background: Spine grape has gained attention in the field of wine science due to its good growth characteristics. Spine grape wine has been made by local residents for a long time. However, the scientific evaluation of spine wine has not been systemically documented compared to Vitis vinifera grape wines Methods: We compared 11 spine wines from south China (W1-W11) with 7 high-quality internati...

In order to analyze and compare the phenolic characteristics of red wine grapes with diverse genetic backgrounds, skin phenolics among 21 different cultivars belonging to Vitis vinifera L., East Asian and North American Vitis species and hybrids, as well as 2 varieties of muscadine grapes were estimated by HPLC-MS/MS. There were 45 anthocyanins, 28 flavonols, 8 flavan-3-ols, 9 cinnamic acids, 5...

The characterization of proteins isolated from skin tissue is apparently an essential parameter for understanding grape ripening as this tissue contains the key compounds for wine quality. It has been particularly difficult to extract proteins from skins for analysis by two-dimensional electrophoresis gels and, therefore, a protocol for this purpose has been adapted. The focus was on the evolut...

The initial concentration of anthocyanin and proanthocyanidin in wine affects the development SO 2 -resistant pigments, as well color non-color contributing polymeric fractions. However, effect extracted monomeric Pinot Noir ( Vitis vinifera L. cv.) grape anthocyanins with seed proanthocyanidins are poorly studied. In model ferments, reaction purified cv. noir extract were investigated at high ...

The aim of this work was to develop cassava starch biocomposites with varius concentrations grape skin (Gr) and acerola (Ac) residues (0.1, 1.0, 5.0 10.0 wt%) using extrusion injection molding processes. Grape residue had the highest concentration total monomeric anthocyanin (ANC) Ac phenolic content (TPC) sugars. fruit thermal degradation onset temperatures above processing temperature profile...

Grape phenolic maturity is usually analysed by destructive wet chemistry in the laboratory. Yet, for precision agriculture more rapid and nondestructive methods are needed. Therefore, in addition to measurements of fruit colour, a new optical method was recently proposed. It is based on the screening of fruit chlorophyll fluorescence that allows both flavonol and anthocyanin contents of intact ...

In this study, eight different types of imidazolium-based ionic liquids (ILs) were applied as new solvents in the extraction of flavonoids from grape skin, and compared to the conventional organic solvent extraction that was not reported earlier. The structure of anions, cations and concentration of ILs significantly affected extraction yields. The highest mass fractions of proanthocyanidins an...

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 a...