Abstract
The behaviour of tomato colour was studied during storage at both optimal and suboptimal temperature conditions. A mathematical model is developed describing the behaviour of tomato colour at different temperatures during storage and at harvest maturity stages. The mathematical description used in the model is a logistic (sigmoid) function with a correction for the actual biological age of the tomato. Accuracy in prediction of colour development is highly dependent on the stage of maturity. For tomatoes in the early breaker stage, prediction of colour and keeping quality is possible. In mature green stage, however, prediction will be inherently less accurate. Dynamically changing storage temperatures can be applied in the model by using the integration of the partial derivative.
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