Figure 4.

Effect of sodium (50, 200 mM) and sulfate (0, 10 mM) concentrations on superoxide and hydrogen peroxide content of Salicornia and Sarcocornia. Sulfate is applied as sodium sulfate and the remainder sodium as sodium chloride. A, Superoxide (O₂⁻) content in Salicornia and Sarcocornia. The values are means ± se (n = 4). B, Hydrogen peroxide (H₂O₂) content in Salicornia and Sarcocornia. The values are means ± se (n = 4). Values denoted with different letters are significantly different according to the Tukey-Kramer HSD test, P < 0.05 (JMP 8.0 software). Different upper-case letters indicate significant differences between sulfate treatments in Salicornia or Sarcocornia. Different lower-case letters indicate significant differences between salinity treatments in Salicornia or Sarcocornia. Different Greek letters indicate significant difference between Salicornia and Sarcocornia subjected to the same treatment.