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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (6): 45-50.doi: 10.11924/j.issn.1000-6850.2014-2396

Special Issue: 生物技术； 小麦

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Effect of Lead and Chromium Stresses on Antioxidant Enzymes Activities and Malondialdehyde Content of Wheat Seedlings

Yang Wenling1,2, Gong Tao1,2, Liu Yingying1,2, Wang Jiwen1,2, Li Guanjie1,2,Liu Li1,2, Zhen Jing1,2, Yue Dandan1,2, Mu Qi2, Chen Guocan2   

  1. (1Key Laboratory of Microbial Engineering of Henan, Zhengzhou 450008;2Henan Academy of Sciences Institute of Biology Co., Ltd, Zhengzhou 450008)
  • Received:2014-09-02 Revised:2015-02-06 Accepted:2014-09-29 Online:2015-03-20 Published:2015-03-20

Abstract: For studying the toxicity mechanism of lead and chromium stresses on wheat, wheat seedlings, ‘Yumai 23’, were used to investigate the effects of different concentrations of lead and chromium stresses on activities of antioxidative enzymes namely catalase (CAT), peroxidase (POD), superoxide dismutase (SOD) and parameters of oxidative stress malondialdehyde (MDA) contents in wheat seedlings. The results indicated that lead and chromium stresses had activation effect on CAT, POD and SOD. Lead and chromium compound stresses caused notable changes on CAT, while the activities of POD and SOD increased obviously under the lead stress or chromium stress. The MDA contents in wheat seedlings had a reducing trend with lead and chromium stress and it decreased notably under lead and chromium compound stresses. But no significant changes were observed for MDA content in the treatment groups of lead stress or chromium stress. The antioxidative enzymes in wheat seedlings played important role under lead and chromium stresses, but it were completely different for the response mechanism to lead and cadmium. The response mechanism of wheat seedlings to heavy metals were influenced by the types of heavy metals as well as the concentration and treatment time of heavy metals.