首页|Aquatic toxicity of di(2-eihylhexyl)phthalate to duckweeds

Aquatic toxicity of di(2-eihylhexyl)phthalate to duckweeds

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This study is concerned with the effects of di(2-ethylhexyl)phthalate(DEHP)on two kinds of duckweeds(Spirodela polyrhiza and Lemna minor).The results indicate that DEHP has aquatic toxicity to Spirodela polyrhiza at 0.4 mg/L and to Lemna minor at over 0.1 mg/L by changing their physiologic-biochemical characteristics.The contents of duckweed chlorophyll and soluble protein decrease with increasing DEHP concentration after 7 d of exposure.DEHP shows the stimulating role in catalase(CAT)and superoxide dismutase(SOD)systems at relative low levels.At 0.01 mg/L and 0.005 mg/L,SOD activities of Spirodela polyrhiza and Lemna minor reach their peak values respectively,while CAT activity reaches its maximum value at 0.05 mg/L and 0.01 mg/L.When DEHP levels are too high,the protection enzyme system would be destroyed and plant growth is inhibited.The analysis of malondialdehyde(MDA)and Fourier transform infrared spectroscopy manifest that DEHP could affect the tested duckweeds by destroying its cell membranes,and Spirodela polyrhiza is more resistant to DEHP exposure than Lemna minor.

di(2-ethylhexyl)phthalate(DEHP)duckweedaquatic toxicityantioxidant enzyme

XU Gang、LIU Ning、WU Ming-hong、GUO Rui-yun、ZHOU Jia-xin、SHI Wen-yan、LI Fa-sheng

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School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,P.R.China

Department of Soil Pollution Control,Chinese Research Academy of Environmental Sciences,Beijing 100012,P.R.China

国家自然科学基金国家自然科学基金Shanghai Leading Academic Discipline ProjectNational Key Technology Research and DevelopmeNational Key Technology Research and DevelopmeNatural Science Foundation of the Science and

4097307340830744S301092008BAC32B032009BAA24B0409ZR1411300

2010

10.1007/s11741-010-0205-3

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2010.14(2)
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