Abstract
In plants, the apparent active uptake of water during
elongation growth is thought to depend on local osmotic
gradients in the apoplast canal surrounding the symplast
around xylem vessel. Plenty of simulation and analytical
results have been hitherto obtained on above water uptake
model. However, net solute efflux into symplast and that
of influx from vessels have not been precisely calculated.
Therefore, we analytically calculated and compared both
quantity. It was found that in the steady state, net solute
efflux into symplast is equal to that of influx from xylem
vessels, and in the state for response to a step change of
solute efflux into the symplast, net solute efflux into the
symplast is greater than that of influx from xylem
vessels.
