Abstract
The non-linear differential equation that describes the coupling between water transport and solute transport, that is dependent on the standing osmosis in narrow long canal systems, was proposed in plants (Katou and Furumoto 1986). In the previous work, we solved the equation analytically and obtained static characteristics of water absorption, proved the contribution of cell wall to water absorption by providing the apoplast canal system surrounding xylem vessels, and estimated roughly the structure of the apoplast canal (Mizuno & Mizuno 2002). We also solved analytically the non-linear partial differential equations that described the system response to a change of solute influx and obtained dynamic characteristics of water absorption to solute absorption (Mizuno & Mizuno 2003).
In the present work, we solved the simultaneous equations which described static and dynamic characteristics of water absorption respectively, and obtained more detailed estimation of the structure of the apoplast canal.
