Oscillations in Functional Structural Plant Growth Models
نویسندگان
چکیده
The dynamic model of plant growth GreenLab describes plant architecture and functional growth at the level of individual organs. Structural development is controlled by formal grammars and empirical equations compute the amount of biomass produced by the plant, and its partitioning among the growing organs, such as leaves, stems and fruits. The number of organs initiated at each time step depends on the trophic state of the plant, which is evaluated by the ratio of biomass available in plant to the demand of all the organs. The control of the plant organogenesis by this variable induces oscillations in the simulated plant behaviour. The mathematical framework of the GreenLab model allows to compute the conditions for the generation of oscillations and the value of the period according to the set of parameters. Two case-studies are presented, corresponding to emergence of oscillations associated to fructification and branching. Similar alternating patterns are commonly reported by botanists. In this article, two examples were selected: alternate patterns of fruits in cucumber plants and alternate appearances of branches in Cecropia trees. The model was calibrated from experimental data collected on these plants. It shows that a simple feedback hypothesis of trophic control on plant structure allows the emergence of cyclic patterns corresponding to the observed ones.
منابع مشابه
Linking structural and process-oriented models of plant growth Development and test of the software NEXUS as a multiple interface for functional-structural models
متن کامل
Towards Functional-structural Modelling of Greenhouse Cucumber
At present, much effort is put into increasing the efficiency of cultivation systems for greenhouse vegetables. There are many options to manage plant growth factors in a greenhouse. For example, supplemental light can be given, even directed at specific plant parts. Functional-structural modelling is expected to help exploring different cultivation and plant manipulation regimes in order to op...
متن کاملStructural Factorization of Plants to Compute Their Functional and Architectural Growth
Numerical simulation of plant growth has been facing a bottleneck due to the cumbersome computation implied by the complex plant topological structure. In this paper, we present a new mathematical model for plant growth, GreenLab, overcoming these difficulties. GreenLab is based on a powerful factorization of the plant structure. Fast simulation algorithms are derived for deterministic and stoc...
متن کاملMechanistically-based functional-structural tree models for simulating forest patch response to interacting environmental stresses
The number of interactions among environmental factors and plant genetic constraints makes an assessment of plant responses to global change factors difficult to solve by experimentation alone. Mechanistically-based Functional-Structural Plant Models (FSPMs) however, have the potential to predict the effects of subtle interactions among environmental driving variables on key physiological proce...
متن کاملSome Parameter Estimation Issues in Functional-Structural Plant Modelling
The development of functional-structural plant models has opened interesting perspectives for a better understanding of plant growth as well as for potential applications in breeding or decision aid in farm management. Parameterization of such models is however a difficult issue due to the complexity of the involved biological processes and the interactions between these processes. The estimati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013