WP2 : SimTraces uptake model
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WP2 : SimTraces uptake model

SimTraces uptake model (Working Package 2)

Model for the uptake of a trace element by a root system

The uptake of a trace element by a growing root system has been modelled by considering the root architecture and a possible variability in the absorption along the root axis of individual roots

 A generic root architecture model developed specifically for the project :  the ArchiSimple model (Pagès et al., 2014, 2013, 2012a, 2012b). ArchiSimple requires only 11 input parameters and can simulate a great diversity of root architectures.

ArchiSimple_Noccea

Noccea caerulescens root system at 30, 50 and 70 days after germination as simulated by ArchiSimple

ArchiSimple_Sunflower

Sunflower (Helianthus annuus) root system at 15, 18 and 21 days after germination as simulated by ArchiSimple

The absorption characteristics of individual roots have been studied showing that uptake could be up 2 times greater around the root tip (Laporte et al., 2014, 2013).

The variability in uptake along each root axis was coupled with ArchiSimple to simulate the uptake of cadmium by a root system and to investigate how root architecture could affect the total uptake.

Given the dynamics of root elongation and possibly the time dependant root diameter, root lifespan and soil conditions, the phytoavailability model (WP1) is applied at each time step to simulate the time-course of uptake by the root system.

Uptake

Specific cumulative uptake (/cm root), total root length, cumulative and daily total uptake (From top to bottom, left to right) of Cd by a growing root system of sunflower as simulated by SimTraces

Modification date: 17 August 2023 | Publication date: 15 January 2014 | By: Christophe Nguyen