A process-based model for leaf development and growth in hardneck garlic (Allium sativum)

Area of Science:

• Agricultural Science
• Plant Physiology
• Computational Biology

Background:

• Phenology and morphology are critical components of crop growth modeling.
• Hardneck garlic (Allium sativum) growth dynamics require specialized modeling approaches.
• Existing models often lack detailed integration of storage and reproductive processes unique to bulbous crops.

Purpose of the Study:

• To develop and present a novel process-based model for hardneck garlic (Allium sativum).
• To capture the dynamic interplay between phenology and morphology throughout the growing season.
• To incorporate unique aspects of bulbous crop growth, including storage and reproductive effects.

Main Methods:

• Integrated non-linear temperature-dependent leaf development with dynamic leaf growth.
• Incorporated bulb storage effects on leaf development and photoperiod effects on reproductive transition.
• Parameterized and validated the model using experimental data and literature across diverse conditions.

Main Results:

• The model accurately simulated the dynamic leaf development and growth of garlic plants.
• Accurate predictions of leaf initiation, maturation, senescence, and green leaf area over time were achieved.
• Bulb storage effects were identified as a crucial parameter, showing relative stability across cultivars.

Conclusions:

• The model offers a novel approach for simulating garlic phenology and morphology across various environments and genotypes.
• It establishes a foundation for bulbous crop growth simulations, aiding in understanding and improving crop development.
• The model has implications for crop improvement programs and modeling other bulbous species.