Articles
USING L-SYSTEMS TO MODEL CARBON TRANSPORT AND PARTITIONING IN DEVELOPING PEACH TREES
Article number
584_2
Pages
29 – 34
Language
English
Abstract
Previously, Grossman and DeJong developed the model PEACH to simulate the growth of peach trees based on the hypothesis that carbon partitioning within the tree is driven by competition among sinks.
In these simulations, sinks were generalized compartments that included maintenance respiration, leaves, fruits, stems, branches, trunk, and roots.
More recently, we have begun to use L-systems to extend these modeling efforts to explicitly include canopy architecture in the simulation of carbon partitioning and growth.
This approach, in which various components of the canopy interact as semi-autonomous elements of a complex network, has provided a context for exploring the influence of canopy architecture on source-sink interactions within a growing tree canopy.
Each internode of the shoot system is represented as a finite element of a resistor network, which functions to connect carbon sources and sinks into a simulated tree canopy.
Carbon is loaded at the sources and unloaded at individual sinks.. At each sink, the sink potential is a function of the growth or storage potential of that sink.
Carbon flow from sources to sinks is determined for each time step using the current values for each source and sink potential, combined with the resistances of each internode and the overall topology of the canopy.
In this manner, carbon is partitioned and canopy growth occurs as a byproduct of the interaction between a large number of individual sources and sinks, rather than as the result of a whole-tree level set of allocation and growth rules.
In these simulations, sinks were generalized compartments that included maintenance respiration, leaves, fruits, stems, branches, trunk, and roots.
More recently, we have begun to use L-systems to extend these modeling efforts to explicitly include canopy architecture in the simulation of carbon partitioning and growth.
This approach, in which various components of the canopy interact as semi-autonomous elements of a complex network, has provided a context for exploring the influence of canopy architecture on source-sink interactions within a growing tree canopy.
Each internode of the shoot system is represented as a finite element of a resistor network, which functions to connect carbon sources and sinks into a simulated tree canopy.
Carbon is loaded at the sources and unloaded at individual sinks.. At each sink, the sink potential is a function of the growth or storage potential of that sink.
Carbon flow from sources to sinks is determined for each time step using the current values for each source and sink potential, combined with the resistances of each internode and the overall topology of the canopy.
In this manner, carbon is partitioned and canopy growth occurs as a byproduct of the interaction between a large number of individual sources and sinks, rather than as the result of a whole-tree level set of allocation and growth rules.
Publication
Authors
M.T. Allen, T.M. DeJong, P. Prusinkiewicz
Keywords
Online Articles (32)