Fig 2. Rotundone accumulation model (RAM) describing the accumulation dynamics of rotundone in grape berries from veraison to harvest using the Gompertz function.
In the Gompertz function, Roti = Gompertz (a, b, c, Ti), Roti is the rotundone concentration of grape berries at the time Ti, parameter a, b and c represents plateau, displacement along time axis and curve growth rate, respectively. Cool and wet seasons are assumed to have higher a, c and lower b compared to hot and dry seasons (a’, b’ and c’).