A density-based approach for the modelling of root architecture : application to Maritime pine (Pinus pinaster Ait.) root systems

Dupuy Laure, Fourcaud Thierry, Stokes Alexia, Danjon Frédéric. 2005. A density-based approach for the modelling of root architecture : application to Maritime pine (Pinus pinaster Ait.) root systems. Journal of Theoretical Biology, 36 (3) : 323-334.

https://doi.org/10.1016/j.jtbi.2005.03.013

Article de revue ; Article de revue à facteur d'impact

Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
document_527978.pdf
Télécharger (666kB)

Liste HCERES des revues (en SHS) : oui

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

Résumé : Root morphology influences strongly plant/soil interactions. However, the complexity of root architecture is a major barrier when analysing many phenomena, e.g. anchorage, water or nutrient uptake. Therefore, we have developed a new approach for the representation and modelling of root architecture based on branching density. A general root branching density in a space of finite dimension was used and enabled us to consider various morphological properties. A root system model was then constructed which minimizes the difference between measured and simulated root systems, expressed with functions which map root density in the soil. The model was tested in 2D using data from Maritime pine Pinus pinaster Ait. structural roots as input. We showed that simulated and real root systems had similar root distributions in terms of radial distance, depth, branching angle and branching order. These results indicate that general density functions are not only a powerful basis for constructing models of architecture, but can also be used to represent such structures when considering root/soil interaction. These models are particularly useful in that they provide a local morphological characterization which is aggregated in a given unit of soil volume.

Mots-clés Agrovoc : Pinus pinaster, système racinaire, modèle de simulation, port de la plante, ramification, densité, relation plante sol, propriété mécanique, morphogénèse

Mots-clés complémentaires : Architecture des arbres, Modélisation mathématique, Relation sol racine

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

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations