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Introducing L-PEACH: Tool for understanding peach tree development
Date:11/17/2011

DAVIS, CA -- In peach trees, as in other plants, the energy used to create carbohydrates that support growth and development comes from solar radiation through the process of photosynthesis. Peach tree productivity is therefore dependent on the tree's photosynthetic efficiency and effectiveness in distributing and using carbohydrates. A basic knowledge of carbon assimilation and partitioning concepts at the whole-tree level can aid growers in understanding how peach trees grow and help them adopt cultural practices that maximize production.

Carbon assimilation and partitioning are dynamic, interrelated, complex phenomena. Canopy carbon assimilation is dependent on the physiological stage of the leaves and external factors such as light environment within the canopy and air temperature. The overall partitioning of carbohydrates within the tree is even more complex than the assimilation process. All tree organs require carbohydrates for growth and maintenance, but requirements vary among tree organs and their stages of development. Although previous carbon-based models have successfully shown the integration of carbon assimilation, organ respiration, reserve dynamics, allocation of assimilates, and growth in trees, the models did not simulate changes in architecture over time.

Researchers from the University of California, Davis, introduced L-PEACH-d, a new model for understanding how peach trees grow (HortTechnology). "To understand how peach trees grow, it is important to understand the dynamic feedback between carbon allocation and tree architecture", explained Theodore DeJong, corresponding author of the study. "This can be obtained with the construction of a functionalstructural plant model."

L-PEACH-d is a computer-based model that simulates the growth of peach trees by integrating important concepts related to carbon assimilation, distribution, and use in the trees. While running L-PEACH-d, three-dimensional depictions of simulat
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Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

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