Grape berry development is reviewed with special focus on berry growth, structure, substances imported, organic acid and sugar metabolism. Berry growth is divided into two growth periods. Berry structure and ultra structure are adapted to sink function. Exocarp cells are characterized by intensive metabolic capacities, flesh cells by a storage role. Early growth is highly sensitive to internal and external parameters. Berry size is largely defined during the first growth period. After "véraison", the berry becomes a major storage sink. Many changes occur in berry metabolism and gene expression. Genomic researches are promising to elucidate the mechanisms of berry development.
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