A developmental model for branching morphogenesis of lake cress compound leaf

Area of Science:

• Plant morphology
• Developmental biology
• Computational modeling

Background:

• Lake cress (Rorippa aquatica) displays diverse leaf shapes, from simple to highly branched compound leaves.
• Leaf morphology variation within a single plant suggests an underlying simple developmental model.

Purpose of the Study:

• To simulate the complex, branched leaf structures of Rorippa aquatica using a theoretical framework.
• To adapt existing reaction-diffusion (RD) models for plant leaf development.

Main Methods:

• Implemented a reaction-diffusion patterning model.
• Modified a 1D RD domain to deform with spatial periodicity during expansion.
• Utilized an iterative pattern generation approach.

Main Results:

• The model successfully generated regular and nested branching patterns.
• The simulation accurately predicted qualitative and quantitative aspects of leaf branching.
• Model predictions aligned with experimentally observed branching patterns in R. aquatica.

Conclusions:

• A simple, iterative reaction-diffusion model can explain the complex branching patterns in Rorippa aquatica leaves.
• The developed model provides a plausible theoretical framework for understanding plant leaf development and morphology.