Mathematical modelling of the uptake and transport of salt in plant roots
Mathematical modelling of the uptake and transport of salt in plant roots
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DOI：
10.1016/j.jtbi.2013.07.025
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发表时间：
2013-11-07
影响因子：
2
通讯作者：
Miklavcic, Stanley J.
中科院分区：
文献类型：
--
作者：
Foster, Kylie J.;Miklavcic, Stanley J.
本文提出并讨论了植物根系离子吸收和转运的数学模型。运移的基本物理模式是基于强迫扩散和对流的机制。该模型可以考虑植物根系主要组织区域的有效离子和水渗透性的局部变化，通过包括质量平衡、强制扩散、对流和电势在内的控制方程的离散耦合系统来表示。我们给出了对由此产生的巨大参数空间进行探索的仿真结果。在我们的研究结果中，我们确定电势是影响根组织中离子运输和积累的主要因素。我们还发现，在土体盐浓度和植物土壤水力压力恒定但现实的条件下，即使在蒸腾流对流作用下，扩散也起着重要的作用。爱思唯尔有限公司版权所有版权所有。
In this paper, we present and discuss a mathematical model of ion uptake and transport in roots of plants. The underlying physical model of transport is based on the mechanisms of forced diffusion and convection. The model can take account of local variations in effective ion and water permeabilities across the major tissue regions of plant roots, represented through a discretized coupled system of governing equations including mass balance, forced diffusion, convection and electric potential. We present simulation results of an exploration of the consequent enormous parameter space. Among our findings we identify the electric potential as a major factor affecting ion transport across, and accumulation in, root tissues. We also find that under conditions of a constant but realistic level of bulk soil salt concentration and plant soil hydraulic pressure, diffusion plays a significant role even when convection by the water transpiration stream is operating. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.