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《Journal of Henan Agricultural Sciences》 2014-02
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Effects of Chromium and Lead Pollution on Growth and Development of Rice Seedling

ZOU Ji-ying;LIU Hui;College of Environmental and Biological Engineering,Jilin Institute of Chemical Technology;  
In order to analyze the damage mechanism of Cr6+and Pb2+on seed germination and initial growth of rice seedlings,the hydroponic method was used to study the effect of different concentrations of Cr6+(0,0.05,0.15,0.25,0.35,0.45,0.55 mg/L)and Pb2+(0,0.05,0.10, 0.15,0.25,0.35,0.50 mg/L)on the growth and development of rice seedlings.The results showed that the growth of rice seedlings was promoted by Cr6+at low concentrations(≤0.25mg/L), but inhibited by Cr6+ at high concentrations(0.25mg/L),and the inhibition effect increased with the increase of Cr6+concentrations.The content of chlorophyll was also promoted by Cr6+ at low concentrations and inhibited by Cr6+at high concentrations.Older rice seedlings accumulated more Cr6+,and the content of accumulated Cr6+increased with the increase of Cr6+concentrations.The growth of rice seedlings was promoted by Pb2+ at low concentrations(≤0.15mg/L), but inhibited by Pb2+at high concentrations(0.15mg/L),and the inhibition effect increased with the increase of Pb2+ concentrations.The content of chlorophyll was also promoted by Pb2+ at low concentrations and inhibited by Pb2+at high concentrations,and with the increase of age,the immunity of rice seedlings to Pb2+ decreased.High content of accumulated Pb2+was found in older seedlings,however,the accumulated Pb2+content in rice seedlings at the same age was inversely proportional to Pb2+ concentrations.
【Fund】: 吉林化工学院科学技术研究项目(2011051)
【CateGory Index】: X173;S511
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