Influence of Inhibitors on the Uptake and the Transport of Chloride Ions in Leaves of Vallisneria spiralis

In this paper the influence of some inhibitors of cell metabolism on the uptake and transport of chloride ions has been investigated. By comparing the effect of an inhibitor on a part of the leaf where both uptake and accumulation of chloride take place with the effect on an adjoining part where the transported ions are accumulated without uptake from the outer solution data have been obtained about the uptake and the accumulation process separately. Azide inhibits the accumulation in the vacuoles, cyanide, arsenate and uranyl inhibit the uptake from the outer solution. The transport through tissue bridges of 4 to 16 mm length was estimated and it was found that azide inhibits the transport through a bundle bridge but not through a parenchyma bridge. The conclusions to be drawn from these results are exposed and a general scheme is given as a basis for the interpretation of the salt transport in Vallisneria leaves and plant roots.