Extending a functional-structural plant model of spring wheat with sub-models for photosynthesis and carbon distribution
نویسندگان
چکیده
Introduction Members of the Poaceae family have been rewarding subjects of research in the field of functional-structural plant modelling (FSPM) (Fournier et al., 2007). Poaceae comprise important cereal crop species such as rice, wheat, and maize, and the plants usually exhibit a regular and co-ordinated development making them particularly suitable for FSPM. The models that have been reported up to now range from descriptive (e.g. Watanabe et al., 2005) to (partially) mechanistic (e.g. Guo et al., 2006; Wernecke et al., 2007). Here we report on our ongoing work on an FSPM of spring wheat (Triticum aestivum L.), of which simulation of growth and development, until recently, have been mainly descriptive. The outgrowth of tiller buds into tillers (branches in Poaceae) has been made dependent on the local ratio between red and far-red light (Evers et al., 2007a). Once the ‘decision’ is taken to develop a particular bud into a tiller, the emergent organs attain more or less predefined properties (e.g. dimensions, shape, etc.). The limitations to this (provisional) approach are (I) source activity is not included and (II) organ outgrowth and dimensions of organs are not subjected to modulation due to sink-source interactions. The general objective of the current work is to add ‘functionality’, i.e. carbon gain and partitioning, to the architectural model in order to obtain a complete FSPM of a canopy of spring wheat plants. Operational objectives of the work include the extension of the current architectural model of spring wheat with provisions that convert radiation absorbed by each element of the 3D structure into photosynthates, and distribute carbon over individual, growing organs.
منابع مشابه
Simulation of wheat growth and development based on organ-level photosynthesis and assimilate allocation.
Intimate relationships exist between form and function of plants, determining many processes governing their growth and development. However, in most crop simulation models that have been created to simulate plant growth and, for example, predict biomass production, plant structure has been neglected. In this study, a detailed simulation model of growth and development of spring wheat (Triticum...
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