Analyzing growth components in trees

Guédon Yann, Caraglio Yves, Heuret Patrick, Lebarbier Emilie, Meredieu Céline. 2007. Analyzing growth components in trees. Journal of Theoretical Biology, 248 : 418-447.

https://doi.org/10.1016/j.jtbi.2007.05.029

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Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Economie-gestion; Psychologie-éthologie-ergonomie

Résumé : Observed growth, as given, for instance, by the length of successive annual shoots along the main axis of a plant, is mainly the result of two components: an ontogenetic component and an environmental component. An open question is whether the ontogenetic component along an axis at the growth unit or annual shoot scale takes the form of a trend or of a succession of phases. Various methods of analysis ranging from exploratory analysis (symmetric smoothing filters, sample autocorrelation functions) to statistical modeling (multiple change-point models, hidden semi-Markov chains and hidden hybrid model combining Markovian and semi-Markovian states) are applied to extract and characterize both the ontogenetic and environmental components using contrasted examples. This led us in particular to favor the hypothesis of an ontogenetic component structured as a succession of stationary phases and to highlight phase changes of high magnitude in unexpected situations (for instance, when growth globally decreases). These results shed light in a new way on botanical concepts such as "phase change and "morphogenetic gradient. © 2007 Elsevier Ltd All rights reserved.

Mots-clés Agrovoc : arbre, croissance, morphogénèse, développement biologique, port de la plante, ramification, modèle mathématique

Mots-clés complémentaires : Architecture des arbres

Classification Agris : F62 - Physiologie végétale - Croissance et développement
F50 - Anatomie et morphologie des plantes
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Hors axes (2005-2013)

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