A Dynamic, Architectural Plant Model Simulating Resource-dependent Growth

Abstract

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.

Sensitivity Analysis of GreenLab Model for Maize

“…Only one parameter (B o ) was optimized to define the beta function for each organ type, and the values of two parameters α o and β o in eqn. (6) are subsequently derived from B o using the constraints α o + β o = 5 and…”

“…Our objective in this paper is to study the interest of global sensitivity analysis and its last developments for the GreenLab model (see [4], [5], [6]), and more generally for a better understanding of source-sink dynamics and internal driving forces during plant growth. Potentially, this work should result in a better parameterization of the GreenLab model.…”

Structural Factorization of Plants to Compute Their Functional and Architectural Growth

“…Here, we present the simple hypotheses used in GreenLab to describe plant functioning. However, it is important to note that more complex models could be implemented in the same framework, see [Yan et al, 2004]. We determine the photosynthetic biomass production by the law of Water Use Efficiency, see [Howell and Musick, 1984]: the plant dry matter acquisition is approximately proportional to the plant transpiration.…”

“…In this paper, we will present an improved method of plant simulation based on a powerful factorization of the plant architectural organization. This factorization method is applied to the functional structural model GreenLab detailed in [Reffye (de) and and [Yan et al, 2004], for deterministic and stochastic simulations. A real breakthrough is achieved as the bottleneck linked to complex tree architectures is suppressed.…”

Incorporating Lindenmayer systems for architectural development in a functional-structural tree model

“…modelling diffusion of substrates). In a number of model or modelling tools, the suitable combination of methods to deal effectively with both architecture and physiology has been addressed (Kurth, 1999;Eschenbach, 2000;Karwowski and Prusinkiewicz, 2003;Yan et al, 2004). The development of models, where the architecture and functioning interact, is of key importance for better understanding the structural dynamics of trees.…”