A functional structural model of grass development based on metabolic regulation and coordination rules

Area of Science:

• Plant Biology
• Computational Biology
• Agricultural Science

Background:

• Plant shoot architecture is crucial for plant-environment interactions.
• Existing models often lack integration of developmental processes with metabolic functions.

Purpose of the Study:

• To develop a novel, integrated model of grass shoot architecture.
• To link plant morphogenesis with carbon (C) and nitrogen (N) metabolism at the organ scale.
• To simulate plant responses within a 3D architectural framework.

Main Methods:

• Developed a self-regulated model of plant morphogenesis driven by metabolite concentrations and temperature.
• Integrated a detailed C and N metabolism model at the organ scale.
• Utilized a 3D plant representation to calculate light and temperature distribution.

Main Results:

• The model, calibrated for wheat (Triticum aestivum), accurately simulated leaf dimensions, extension dynamics, and organ mass/composition.
• Emergent plant and agronomic traits were simulated, reflecting realistic growth patterns.
• Investigated metabolic activities of growing leaves in relation to whole-plant function.

Conclusions:

• The integrated model provides a powerful tool for understanding plant phenotype plasticity.
• This approach enhances our ability to predict plant responses to diverse environmental conditions.
• Represents a significant advancement in modeling plant development and metabolism.