Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 71, Issue 3, Pages 632-637Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2008.04.001
Keywords
Ca2+; Cd2+; Pb2+; Subcellular distribution; E. fetida
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Funding
- CAS Research Program on Soil Biosystems and Agro-product Safety [CXTD-Z2005-4-1]
- National Natural Science Foundation of China [40671095]
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A semi-static solution culture method was used to study the effects of Ca2+ supply and interaction of Cd-Pb on the subcellular distribution of Cd and Pb in earthworm Eisenia fetida. The subcellular distribution of Cd and Pb was shown to be metal specific. About 80% of the Cd was distributed in the cytosol (fraction G), and only about 20% of total Cd was found in the tissue and cell membrane (fraction E) and the microsomes (fraction F). Nearly 50% of the Pb was rich in the tissue and cell membrane (fraction E). The Supply of Ca2+ ions significantly decreased Cd concentration in the cytosol (fraction G) and the whole tissue of the E. fetida. At the subcellular level, the addition of Pb2+ ions significantly decreased the Cd percentage associated with fraction G from 83.7% to 58.4% and increased fraction E from 10.7% to 34.0%, respectively. (C) 2008 Elsevier Inc. All rights reserved.
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