The grapevine cluster and the grapevine berry
The grapevine structure
The grapevine cluster is made of a rachis and berries.
The rachis
On the central axis, we find the peduncle, with the pedicels. The rachis is made of all green parts of a cluster. The stalk is made for the most part with water, fibers, tannins and minerals.
The grapevine berry
The berry is made of:
- film or skin that surrounds the fruit. It is covered with a wax dust called bloom, which makes
a non-wettable film. It includes yeast involved during the fermentation.
The film contains odorous substances and coloring tannins smoother than the ones from the rachis. - pulp, with juice made of water, sugars and acids.
- seeds, 1 or 2 per berry, made of tannins and oils (0.5 l of oil for 1 hl of wine).
- Varietals with white skin and white pulp : blanc de blanc
- Varietals with red skin and white pulp: blanc de noir
- Varietals with red skin and red pulp:dyer varietal
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