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Cell division, endoreduplication and expansion processes: setting the cell and organ control into an integrated model of tomato fruit development

Valentina Baldazzi 1, 2 Michel Génard 2 Nadia Bertin 2
1 BIOCORE - Biological control of artificial ecosystems
INRA - Institut National de la Recherche Agronomique, CRISAM - Inria Sophia Antipolis - Méditerranée , LOV - Laboratoire d'océanographie de Villefranche
Abstract : The development of a new organ is the result of coordinated events of cell division and expansion, in strong interaction with each other. This paper presents an improved version of a tomato model, which includes cells division, endoreduplication and expansion processes. The model is used to investigate the interaction among these developmental processes, in the perspective of a new cellular theory. In particular, different control schemes (either cell- or organ-based) are tested and simulation results are compared to observed data. The model shows that a pure cell-based control fails to reproduce the observed cell size distribution, and an organ-based control is needed in order to get realistic cell and fruit sizes. The model also supports the role of endoreduplication as an important modulator of the cell expansion potential.
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Valentina Baldazzi, Michel Génard, Nadia Bertin. Cell division, endoreduplication and expansion processes: setting the cell and organ control into an integrated model of tomato fruit development. Acta Horticulturae, International Society for Horticultural Science, 2017, 1182, pp.257 - 264. ⟨10.17660/ActaHortic.2017.1182.31⟩. ⟨hal-01661920⟩

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