Figure 6.

Glutathione homeostasis in wheat seedlings after cadmium, or cadmium + melatonin treatments. The total glutathione (A), oxidized glutathione (B), reduced glutathione (C) and GSH/GSSG ratio (D) of the four-day-old wheat seedlings were determined at 12 h after root treatment with cadmium (0.2 mM), or melatonin + cadmium. GSH content = T-GSH − 2GSSG. Data are means ± SE of three replicates. Means with different letters (a, b, c, d and e) are significantly different at p < 0.05 using Tukey’s test. Me, melatonin; GSH, reduced glutathione; GSSG, oxidized glutathione; T-GSH, total glutathione.