%0 Journal Article %A BAI Xiao-juan %A LIU Li-juan %A ZHANG Chun-hua %A GE Ying %T Effect of H2O2 Pretreatment on Cd Tolerance of Different Rice Cultivars %D 2010 %R 10.3969/j.issn.1001-7216.2010.04.010 %J Chinese Journal OF Rice Science %P 391-397 %V 24 %N 4 %X The effect of H2O2 pretreatment on Cd tolerance and translocation in rice seedlings was studied by using two rice cultivars (N076 and N0763) differing in Cd tolerance. The contents of malondialdehyde(MDA), reduced glutathione (GSH), nonprotein thiols (NPT), phytochelatins(PCs) and the activity of glutathione Stransferase (GST) were compared between the two cultivars exposed to various treatments. The results showed that 50 μmol/L Cd exposure significantly inhibited rice growth, enhanced the production of GSH, NPT, PCs, MDA and the activity of GST, and there were significant differences between the two cultivars. More Cd was transported into the shoot in N076. The H2O2 pretreatment alleviated Cd toxcity by further increasing GSH, NPT and PCs contents, as well as the root GST activities. The larger increase in N0763 than in N076 suggests that the tolerance of N0763 was enhanced more significantly than N076. H2O2 pretreatment reduced Cd translocation to rice shoots but affected the Cd concentration in roots differently. From the above results, it may be speculated that there were clear differences in the Cd detoxification and response to the H2O2 pretreatment between the two cultivars.
%U http://www.ricesci.cn/EN/10.3969/j.issn.1001-7216.2010.04.010