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《Journal of Arid Land Resources and Environment》 2012-03
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Effects of lead stress on antioxidant enzymes activities of Robinia psedoacacia and Amaorpha fruticosa

YANG Nan,WANG Jinxin,ZHOU Furong,WANG Yan(College of Resources and Environment,Northwest A&F University/Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China,Ministry of Agriculture.Yangling 712100,P.R.China)  
The effects of heavy metal Pb on antioxidant enzymes activities(SOD、POD) and malondialdehyde(MDA) concentration in the leaves of one-year old seedlings of Robinia psedoacacia and Amaorpha fruticosa were studied with pot experiments.Results showed that the activities of the SOD in the leaves of Robinia psedoacacia and Amaorpha fruticosa increased significantly in the treatments of Pb2+ stress compared with the control at the lower concentration,and subsequently decreased along with higher concentration;The SOD activity of Amaorpha fruticosa was significantly higher than that of Robinia psedoacacia when Pb2+ stress concentration was greater than 2.5g/kg.The POD activity of Amaorpha fruticosa increased to the maximum at the pb2+ concentration of 3.5g/kg and decreased gradually,the POD activity of Amaorpha fruticosa was significantly higher than that of Robinia psedoacacia.There was a same trend of the MDA content in Robinia psedoacacia as in Amaorpha fruticosa.The MDA content in Robinia psedoacacia was higher than that of Amaorpha fruticosa.This results indicated that the resistance of Amaorpha fruticosa was better than Robinia psedoacacia.
【Fund】: 国家自然科学基金项目(31170579)资助
【CateGory Index】: S792.27;S793.2
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