Comparison of lipid peroxidation and ROS scavenging of OsCYP2 -transgenic rice seedlings and wild-type seedlings under salt stress. OsCYP2-transgenic rice seedlings had lower malonaldehyde (MDA) content and H2O2 and higher antioxidant enzyme activities than wild-type seedlings. Ten-day-old rice seedlings were treated with 200 mM NaCl for 24 h. The levels of MDA (A) and H2O2 (B) were determined with thiobarbituric acid (TBA) and ferric-xylenol orange complex, respectively. The activities of antioxidant enzymes SOD (C), CAT (D), and APX (E) were assayed. Each value was the mean ± S.E. of four treatments.