A model of fruit growth integrating cell division and expansion processes

Valentina Baldazzi (1) , Nadia Bertin (1) , Michel M. Génard (1)

1 PSH - Unité de recherche Plantes et Systèmes de Culture Horticoles

The development of a new organ is the results of coordinated events of cell division and expansion. Fruit growth starts immediately after bloom with intensive cell division. As development proceeds, the proliferative activity of cells progressively slows down giving way to a phase of pure cell enlargement, during fruit growth and ripening. Modeling the way cell division and expansion progress together is crucial to understand the emergence of specific morphological traits ( fruit size, weight, shape and texture) and their dependence on environmental factors. Models already exist for cell division and late fruit growth ( cell expansion), but the coupling of the two processes have not been addressed yet in fruit. Here we propose a first integrated model of tomato fruit development, explicitly coupling cell proliferation and expansion. The model is used to predict the evolution of cell number, size and ages during fruit development, under different environmental conditions.

Mots clés: fruit development; fruit growth; water and carbon fluxes; tomato

Mots clés: model

Domaines: Sciences agricoles; Biologie végétale

Valentina Baldazzi, Nadia Bertin, Michel M. Génard. A model of fruit growth integrating cell division and expansion processes. 4. International Symposium on Models for Plant Growth, Environmental Control and Farm Management in Protected Cultivation (HortiModel), International Society for Horticultural Science (ISHS). INT., Nov 2012, Nanjing, China. 6 p. ⟨hal-02747160⟩