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. 2015 Jul 15;10(7):e0133137. doi: 10.1371/journal.pone.0133137

Fig 8. Estimating the accumulation of rotundone in grape berries (Roti) since veraison in three continuous growing seasons using Gompertz function.

Fig 8

Estimation based (a) calendar day since fruit set: 2011–12, Roti = Gompertz (140.2, 522700, 0.1624, Ti), R2 = 0.99, RMSE = 3.74; 2012–13, Roti = Gompertz (64.96, 99.1, 0.0518, Ti), R2 = 0.85, RMSE = 10.3; 2013–14, Roti = Gompertz (could not be determined, 17.2, 0.0047, Ti), R2 = 0.73, RMSE = 6.812; based on (b) cumulative degree hours above 25°C from veraison: 2011–12, Roti = Gompertz (162.8, 95280, 0.01843, Ti), R2 = 0.99, RMSE = 3.73; 2012–13, Roti = Gompertz (45.09, 124800000, 0.0232, Ti), R2 = 0.90, RMSE = 10.27; 2013–14, Roti = Gompertz (could not be determined, 20.32, 0.0007036, Ti), R2 = 0.67, RMSE = 7.50.