A dynamic, architectural plant model simulating resource-dependent growth

Hongping Yan 1 Meng Zhen Kang 1 Philippe De Reffye 1, 2 Michael Dingkuhn 3
2 DIGIPLANTE - Modélisation de la croissance et de l'architecture des plantes
MAS - Mathématiques Appliquées aux Systèmes - EA 4037, Inria Saclay - Ile de France, Ecole Centrale Paris, Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] : UMR
Abstract : Background and Aims Physiological and architectural plant models have originally been developed for different purposes and therefore have little in common, thus making combined applications dif®cult. There is, however, an increasing demand for crop models that simulate the genetic and resource-dependent variability of plant geometry and architecture, because man is increasingly able to transform plant production systems through combined genetic and environmental engineering. d Model GREENLAB is presented, a mathematical plant model that simulates interactions between plant structure and function. Dual-scale automaton is used to simulate plant organogenesis from germination to maturity on the basis of organogenetic growth cycles that have constant thermal time. Plant fresh biomass production is computed from transpiration, assuming transpiration ef®ciency to be constant and atmospheric demand to be the driving force, under non-limiting water supply. The fresh biomass is then distributed among expanding organs according to their relative demand. Demand for organ growth is estimated from allometric relationships (e.g. leaf surface to weight ratios) and kinetics of potential growth rate for each organ type. These are obtained through parameter optimization against empirical, morphological data sets by running the model in inverted mode. Potential growth rates are then used as estimates of relative sink strength in the model. These and other `hidden' plant parameters are calibrated using the non-linear, least-square method. d Key Results and Conclusions The model reproduced accurately the dynamics of plant growth, architecture and geometry of various annual and woody plants, enabling 3D visualization. It was also able to simulate the variability of leaf size on the plant and compensatory growth following pruning, as a result of internal competition for resources. The potential of the model's underlying concepts to predict the plant's phenotypic plasticity is discussed.
Type de document :
Article dans une revue
Annals of Botany, Oxford University Press (OUP), 2004, Annals of Botany, 93, pp.591-602
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Soumis le : mercredi 17 janvier 2007 - 14:20:17
Dernière modification le : jeudi 29 mars 2018 - 13:36:02

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  • HAL Id : inria-00122497, version 1

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Hongping Yan, Meng Zhen Kang, Philippe De Reffye, Michael Dingkuhn. A dynamic, architectural plant model simulating resource-dependent growth. Annals of Botany, Oxford University Press (OUP), 2004, Annals of Botany, 93, pp.591-602. 〈inria-00122497〉

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