NaCl (75 and 150 mM) significantly decreased stomatal conductance (gs) in salt-sensitive genotype (Red Ball), whereas the effect of NaCl was significant in salt-tolerant genotype (Indent-1) only with-out potassium (Fig. 2). Without potassium there was no difference between the two genotypes at NaCl levels (75 and 150 mM), however it was significant when adding potassium. Effect of potassium was highly significant in only salt-tolerant genotype.