1. General Model Information

Name: SOLute TRANsport Simulator


Main medium: terrestrial
Main subject: biogeochemistry
Organization level: organ, cell
Type of model: not specified
Main application:
Keywords: crop, plant physiology, solute transport, cellular root compartments, ion dynamics, ion distribution


Drs. T.J. Bouma
State College
Dept. of Horticulture
103 Tyson Building
University Park
PA 16802
Fax :



A one cell thick slice of a cylinder shaped root is considered, consisting of a number of concentric cell layers. Cell wall, cytoplasm and vacuole for each concentric layer of one cell width, and the external medium are distinguished as different compartments. Cellular compartments within the same concentric cell layer are not regarded separately. The model simulates the time course of:
1. the fraction labelled ions in all cellular root compartments during loading from a 100% labelled medium,
2. the contribution of ions from all cellular root compartments to the overall efflux into the surrounding medium, from an initially 100% labelled root with all compartments containing separate labels, and
3. the reallocation, with the cellular root compartments, of the ions remaining in this initially 100% labelled root during the efflux period. Thus, the model continuously accounts for the distribution of all ions, separately labelled indicating the original location at the start of the calculations. The efflux kinetics from wash-out experiments after a given loading period (i. e. a not 100% labelled root), are derived by multiplying the simulated efflux kinetics per compartment (ii) by the simulated fraction labelled ions in each compartment at the end of the leading period (i).

Author of the abstract:

CAMASE (Concerted Action for the development and testing of quantitative methods for research on Agricultural Systems and the Environment):

II. Technical Information

II.1 Executables:

Operating System(s): Any fast computer will do, we used an a-VAX

II.2 Source-code:

Programming Language(s): FORTRAN-77

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

Time interval of simulation: Optimized, but generally << 1 second.
Basic spatial unit: cm2.

IV. References

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: Tue Oct 7 1997
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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