Taking into account the role of potassium in the osmotic cell
adjustment and in the hydration of the plant (Hsiao and Läuchli,1986), it is reasonable to assume that water stress can affect the regulation of potassium transport from the root to the shoot as part of the plant’s general strategy for restoring cell turgidity and plant growth after a water stress period. Despite its importance, little is
known about this subject matter. However, the results obtained in
this work support the hypothesis that re-watering roots after a
water deficit favours the transport of K+ in the root in direct
proportion to the degree of susceptibility to water stress of the
different cultivars. In other words,thehigher the susceptibility,the