YANG, Ming; DEFOSSEZ, Pauline; DANJON, Frederic; DUPONT, Sylvain; FOURCAUD, Thierry

doi:10.1007/s11104-016-2992-0

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

YANG, Ming
Interactions Sol Plante Atmosphère [UMR ISPA]

DEFOSSEZ, Pauline
Interactions Sol Plante Atmosphère [UMR ISPA]

DANJON, Frederic
Biodiversité, Gènes & Communautés [BioGeCo]

Langue

Article de revue

Ce document a été publié dans

Plant and Soil. 2017, vol. 411, n° 1, p. 275–291

Springer Verlag

Résumé en anglais

Background and Aims Root anchorage function is crucial for tree survival as most trees are exposed to recurrent wind throughout their lifespan. Trees exhibit a large variability of root system architecture (RSA) due genetic and environmental factors. This study aims to understand the links between RSA and tree stability.Methods A 3D biomechanical model was used to simulate tree overturning. To capture the variability of sinker RSA, fourteen virtual root patterns were created from an ensemble average of measured Pinus pinaster root systems. Root virtual patterns and tree-pulling simulations were verified against experimental data.Results The model predicts realistic tree anchorage strength, root stress, and failure patterns. Only a few root components contribute significantly to anchorage strength. The taproot contributes the most to anchorage rigidity, representing 61 % of the anchorage strength. The windward roots failure drives ultimate anchorage failure, representing 25 % of the anchorage strength. Simulations show that root secondary thickening induces higher anchorage rigidity and increases anchorage strength by 58 %.Conclusions This innovative approach appears promising for describing tree stability and its acclimation to external constraints.< Réduire

Mots clés

système racinaire

arbre forestier

pinus pinaster

ancrage racinaire

stabilité de l'arbre

stress

modèle biomécanique

modèle 3d

Mots clés en anglais

root system architecture

numerical modelling

root anchorage

root stress

failure patterns

root systems

forest tree

maritime pine

three dimensional model

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Which root architectural elements contribute the best to anchorage of Pinus species? Insights from in silico experiments

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés

Mots clés en anglais

URI

DOI

Origine

Unités de recherche