efficiency in salt excretion and physiological tolerance to salt-induced stress in South Africa.

This study, investigated the salt excretion efficiency and the level of the physiological response to salt-induced stresses between the native and exotic species as well as their hybrids ( × and × ). Ten potted plants from each of the five taxa were exposed to salt at a concentration of 3% (w/w) (180 mM) for 3 weeks. Measurements of electro-conductivity (EC), physiological parameters such as stomatal conductance, chlorophyll fluorescence, and water pressure and plant growth were taken from salt-treated and control plants.