Biochemical analysis. Evolution of physical (berry volume) and chemical (anthocyanins content, solid soluble concentration, titratable acidity) parameters in control (circle) and NAA-treated (square) berries throughout fruit development. NAA treatment (arrow) was performed at 53 DAFB. Data concerning volume are the average of values obtained by fifty berries. Soluble solid concentration, tritatable acidity, malic acid, tartaric acid and anthocyanin contents are given by the average values of three biological replicates. Bars represent the SE.