Fig. 8

Effects of NaHS on mitochondrial Cyt c/a, MPTP and caspase-3-like activity of cucumber seedlings root tips under Cd stress. Con: distilled water; Cd: 200 μM Cd stress for 48 h; NaHS: pretreated with 100 μM NaHS for 24 h; NaHS + Cd; seedlings were pretreated with 100 μM NaHS for 24 h and then treated with 200 μM Cd for 48 h. The ratio of Cyt c/a (a), mitochondrial membrane absorbance (b) and caspase-3-like (c) were measured after 48 h in different treatments. The data are means ± SE of three independent experiments. Different letters indicate significant differences (P < 0.05; Duncan’s multiple range test)