Effect of topological and phenological changes on biomass partitioning in Arabidopsis thaliana inflorescence: a preliminary model-based study

Veronique Letort (1, 2) , Paul-Henry Cournède (1, 2) , Jérémie Lecoeur (3) , Irène Hummel (3) , Philippe de Reffye (2, 4) , Angélique Christophe (5)

1 MAS - Mathématiques Appliquées aux Systèmes - EA 4037
2 DIGIPLANTE - Modélisation de la croissance et de l'architecture des plantes
3 LEPSE - Écophysiologie des Plantes sous Stress environnementaux
4 UMR AMAP - Botanique et Modélisation de l'Architecture des Plantes et des Végétations
5 INRA - Institut National de la Recherche Agronomique

Although the existence of phenological impact on biomass partitioning in the plant is known for many species, it is difficult to quantify this effect and to unravel it from the complex functional processes that interact during plant growth. This work explores the variations of biomass allocated to fruits according to simple changes in the topological and phenological development of Arabidopsis thaliana plants. Four plants of the same genotype (ecotype Columbia) were grown in controlled conditions in growth chamber. Their topological differences were studied using the functional-structural model GreenLab. It showed that when fitting the four plants with a single set of parameters, but each plant being given its own topological structure, half of the biomass variability can be reproduced.

Mots clés: Functional-structural model; Inflorescence; Development

Domaines: Systèmes dynamiques [math.DS]; Biologie végétale

Veronique Letort, Paul-Henry Cournède, Jérémie Lecoeur, Irène Hummel, Philippe de Reffye, et al.. Effect of topological and phenological changes on biomass partitioning in Arabidopsis thaliana inflorescence: a preliminary model-based study. PMA06, Plant Growth Modeling, Simulation, Visualization and applications, Nov 2006, Beijing, China. pp.65-69. ⟨hal-00576589⟩