Analysing growth and development of plants jointly using developmental growth stages

Anaëlle Dambreville 1, 2 Pierre-Éric Lauri 2 Frédéric Normand 1 Yann Guédon 3, 2, *
* Corresponding author
3 VIRTUAL PLANTS - Modeling plant morphogenesis at different scales, from genes to phenotype
UMR AGAP - Amélioration génétique et adaptation des plantes méditerranéennes et tropicales, INRA - Institut National de la Recherche Agronomique, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : Background and Aims Plant growth, the increase of organ dimensions over time, and development, the change in plant structure, are often studied as two separate processes. However, there is structural and functional evidence that these two processes are strongly related. The aim of this study was to investigate the co-ordination between growth and development using mango trees, which have well-defined developmental stages. Methods Developmental stages, determined in an expert way, and organ sizes, determined from objective mea-surements, were collected during the vegetative growth and flowering phases of two cultivars of mango, Mangifera indica. For a given cultivar and growth unit type (either vegetative or flowering), a multistage model based on abso-lute growth rate sequences deduced from the measurements was first built, and then growth stages deduced from the model were compared with developmental stages. Key Results Strong matches were obtained between growth stages and developmental stages, leading to a consis-tent definition of integrative developmental growth stages. The growth stages highlighted growth asynchronisms be-tween two topologically connected organs, namely the vegetative axis and its leaves. Conclusions Integrative developmental growth stages emphasize that developmental stages are closely related to organ growth rates. The results are discussed in terms of the possible physiological processes underlying these stages, including plant hydraulics, biomechanics and carbohydrate partitioning.
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Anaëlle Dambreville, Pierre-Éric Lauri, Frédéric Normand, Yann Guédon. Analysing growth and development of plants jointly using developmental growth stages. Annals of Botany, Oxford University Press (OUP), 2015, 115 (1), pp.13. ⟨10.1093/aob/mcu227⟩. ⟨hal-01100553⟩

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