Epidermis: nm The skin of the grape is composed of an epidermis (see epicarp) covered on the surface by a waxy cuticle, the bloom. The bloom protects the grain from external agents: rain, humidity, heat while retaining the germs brought by insects and the wind (sporulated yeasts, molds, bacteria). Next comes what is the hypodermis. It contains in particular the anthocyanins, responsible for the color of red wines and the volatile compounds which constitute the aroma of ...
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