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Simulating the effects of localized red:far-red ratio on tillering in spring wheat (Triticum aestivum) using a three-dimensional virtual plant model
Article first published online: 20 JUL 2007
DOI: 10.1111/j.1469-8137.2007.02168.x
© The Authors (2007). Journal compilation © New Phytologist (2007)
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How to Cite
Evers, J. B., Vos, J., Chelle, M., Andrieu, B., Fournier, C. and Struik, P. C. (2007), Simulating the effects of localized red:far-red ratio on tillering in spring wheat (Triticum aestivum) using a three-dimensional virtual plant model. New Phytologist, 176: 325–336. doi: 10.1111/j.1469-8137.2007.02168.x
Publication History
- Issue published online: 20 JUL 2007
- Article first published online: 20 JUL 2007
- Received: 5 April 2007 Accepted: 24 May 2007
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Keywords:
- functional–structural model;
- nested radiosity;
- plant architecture;
- red:far-red ratio;
- shade avoidance;
- tillering;
- virtual plant;
- wheat (Triticum aestivum)
Summary
- • The outgrowth of tiller buds in Poaceae is influenced by the ratio of red to far-red light irradiance (R:FR). At each point in the plant canopy, R:FR is affected by light scattered by surrounding plant tissues. This paper presents a three-dimensional virtual plant modelling approach to simulate local effects of R:FR on tillering in spring wheat (Triticum aestivum).
- • R:FR dependence of bud outgrowth was implemented in a wheat model, using three hypothetical responses of bud extension to R:FR (unit step, curvilinear and linear response). Bud break occurred when a threshold bud length was reached. Simulations were performed for three plant population densities.
- • In accordance with experimental observations, fewer tillers per plant were simulated for higher plant population densities. The linear and curvilinear responses caused a delay in the increase in tiller number compared with experimental data. The unit step response approached experimental results best. It is suggested that a model based on relatively simple relations can be used to simulate degree of tillering.
- • This study has shown that the virtual plant approach is a promising tool with which to address crop morphological and ecological research questions where the determining factors act at the level of the individual plant organ.