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Grapes ripening on the vine. In viticulture, ripeness is the completion of the ripening process of wine grapes on the vine which signals the beginning of harvest.What exactly constitutes ripeness will vary depending on what style of wine is being produced (sparkling, still, fortified, rosé, dessert wine, etc.) and what the winemaker and viticulturist personally believe constitutes ripeness.
Red wine is a type of wine made from dark-colored grape varieties - (red grapes.) The color of the wine can range from intense violet, typical of young wines, through to brick red for mature wines and brown for older red wines. The juice from most purple grapes is greenish-white, the red color coming from anthocyan pigments present in the skin ...
It is a six-carbon sugar molecule derived from the breakdown of sucrose. At the beginning of the ripening stage there is usually more glucose than fructose present in the grape (as much as five times more) but the rapid development of fructose shifts the ratio to where at harvest there are generally equal amounts. Grapes that are overripe, such ...
Gewürztraminer is a variety with a pink to red skin colour, which makes it a "white wine grape" as opposed to the blue to black-skinned varieties commonly referred to as "red wine grapes". The variety has high natural sugar and the wines are white and usually off-dry, with a flamboyant bouquet of lychees.
Here the grape is the third most widely planted red grape variety, accounting for nearly 15% of all red wine grape plantings, with 6,614 hectares (16,340 acres) of Merlot in cultivation in 2008. The majority of these plantings are found in the Stellenbosch region with 2,105 hectares (5,200 acres) and Paarl with 1,289 hectares (3,190 acres).
Grape berries follow a double sigmoid growth curve. The initial phase of berry growth is a result of cell division and cell expansion. As berry growth of phase I slows this is termed the lag phase. The lag phase is not a physiological growth stage, but an artificial designation between the two growth periods of grape berry development.
The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity and the presence of secondary compounds. Vines store sugar in grapes through photosynthesis, and acids break down as grapes ripen. Secondary compounds are also stored in the ...
Pinot noir (French: [pino nwaʁ] ⓘ), also known as Pinot nero, is a red-wine grape variety of the species Vitis vinifera. The name also refers to wines created predominantly from Pinot noir grapes. The name is derived from the French words for pine and black.