MuSCA: a multi-scale source-sink carbon allocation model to 2 explore carbon allocation in plants. An application on static apple-tree - Archive ouverte HAL Access content directly
Journal Articles Annals of Botany Year : 2020

MuSCA: a multi-scale source-sink carbon allocation model to 2 explore carbon allocation in plants. An application on static apple-tree

(1, 2, 3) , (4) , (5, 4) , (6) , (3) , (4, 7) , (3) , (3)
1
2
3
4
5
6
7

Abstract

Background and aims : Carbon allocation in plants is usually represented at a topological scale, specific to each model. This makes the results obtained with different models, and the impact of their scales of representation, difficult to compare. In this study, we developed a multi-scale carbon allocation model (MuSCA) that allows the use of different, user-defined, topological scales of a plant, and assessment of the impact of each spatial scale on simulated results and computation time. Methods : Model multi-scale consistency and behaviour were tested on three realistic apple tree structures. Carbon allocation was computed at five scales, spanning from the metamer (the finest scale, used as a reference) up to first-order branches, and for different values of a sap friction coefficient. Fruit dry mass increments were compared across spatial scales and with field data. Key Results : The model was able to represent effects of competition for carbon assimilates on fruit growth. Intermediate friction parameter values provided results that best fitted field data. Fruit growth simulated at the metamer scale differed of ~1 % in respect to results obtained at growth unit scale and up to 60 % in respect to first order branch and fruiting unit scales. Generally, the coarser the spatial scale the more predicted fruit growth diverged from the reference. Coherence in fruit growth across scales was also differentially impacted, depending on the tree structure considered. Decreasing the topological resolution reduced computation time by up to four orders of magnitude. Conclusions : MuSCA revealed that the topological scale has a major influence on the simulation of carbon allocation. This suggests that the scale should be a factor that is carefully evaluated when using a carbon allocation model, or when comparing results produced by different models. Finally, with MuSCA, trade-off between computation time and prediction accuracy can be evaluated by changing topological scales.
Fichier principal
Vignette du fichier
musca_reyes2019_inpress.pdf (2.8 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02262908 , version 1 (02-08-2019)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Francesco Reyes, Benoit Pallas, Christophe Pradal, Federico Vaggi, Tagliavini Marco, et al.. MuSCA: a multi-scale source-sink carbon allocation model to 2 explore carbon allocation in plants. An application on static apple-tree. Annals of Botany, 2020, 126 (4), pp.571-585. ⟨10.1093/aob/mcz122⟩. ⟨hal-02262908⟩
138 View
265 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More