AI Article Synopsis
- The study introduces a new model for simulating the growth of Arabidopsis thaliana, focusing on its whole-plant development, including organ formation and carbon distribution.
- The model, adapted from the GreenLab model, analyzes competition for resources among different plant parts as they grow, using data to estimate organ strength and biomass production.
- Key findings indicate that competition among plant organs varies throughout development stages, with significant competition emerging during the reproductive phase, especially when lateral flowers develop.
Article Abstract
Arabidopsis thaliana (L.) Heynh. is used as a model plant in many research projects. However, few models simulate its growth at the whole-plant scale. The present study describes the first model of Arabidopsis growth integrating organogenesis, morphogenesis and carbon-partitioning processes for aerial and subterranean parts of the plant throughout its development. The objective was to analyse competition among sinks as they emerge from patterns of plant structural development. The model was adapted from the GreenLab model and was used to estimate organ sink strengths by optimisation against biomass measurements. Dry biomass production was calculated by a radiation use efficiency-based approach. Organogenesis processes were parameterised based on experimental data. The potential of this model for growth analysis was assessed using the Columbia ecotype, which was grown in standard environmental conditions. Three phases were observed in the overall time course of trophic competition within the plant. In the vegetative phase, no competition was observed. In the reproductive phase, competition increased with a strong increase when lateral inflorescences developed. Roots and internodes and structures bearing siliques were strong sinks and had a similar impact on competition. The application of the GreenLab model to the growth analysis of A. thaliana provides new insights into source-sink relationships as functions of phenology and morphogenesis.
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| http://dx.doi.org/10.1071/FP08099 | DOI Listing |
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