THE EFFECT OF PLANTING Iris lactea var. chinensis ON Pb FRACTIONATIONS AND ACTIVITIES OF ENZYMES IN ARTIFICIAL Pb CONTAMINATED SOILS
文献类型： 外文期刊
作者： Yuan, Hai-Yan 1 ; Tong, Hai-Ying 1 ; Huang, Su-Zhen 1 ; Han, Yu-Lin 2 ; Guo, Zhi 4 ; Gu, Ji-Guang 5 ;
作者机构： 1.Chinese Acad Sci, Inst Bot, Nanjing 210014, Jiangsu, Peoples R China
2.Jiangxi Univ Finance & Econ, Expt Teaching Ctr Ecol Environm Jiangxi Prov, Dept Landscape Architecture, Nanchang 330032, Peoples R China
3.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Jiangsu, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm, Nanjing 210014, Jiangsu, Peoples R China
5.Jinan Univ, Coll Life Sci & Technol, Guangzhou 510632, Guangdong, Peoples R China
关键词： iris lactea var. chinensis;lead (Pb) fractionations;activities of enzymes;artificial pb contaminated soils
期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）
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年卷期：
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收录情况： SCI
摘要： The effects of the artificial Pb contaminated soils in which planted or unplanted Iris lactea var. chinensis on the changes of Pb fractionations and the activities of three enzymes in the soils, and the growth and Pb contents in the seedlings of I. lactea var. chinensis were studied. The results show that Pb concentrations of all fractionations in the Pb treated soils increased as the Pb level enhanced and these fractionations in the soils planted with I. lactea var. chinensis were lower than those in the unplanted soils except the concentrations of carbonate bound Pb and oxide bound Pb under 800 mg kg~(-1) treatment. The dry weights (DWs) of leaves of I. lactea var. chinensis under all treatments after 28 d exposure were not significant different with those of control. However, the DWs of roots decreased gradually and the root DW under 800 mg kg~(-1) stress decreased to 78% of the control. The Pb concentrations in the leaves and roots of I. lactea var. chinensis at 800 mg kg"1 treatment were 389.8 and 1901.7 mg kg"1, respectively. The activities of peroxidase and urease were induced to show a dose-dependent decrease in the unplanted soils or the soils planted with I. lactea var. chinensis and the activities of urease in the soils planted with I. lactea var. chinensis were higher than those in the unplanted soils in all Pb treatments. The results indicated that the plantation of I. lactea var. chinensis could reduce the Pb concentrations of water soluble fraction and exchangeable fraction effectively and remit the influence of Pb stress on the activities of urease.
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