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As-resistance in Laboratory reared Fl, F2 and F3 generation offspring of the earthworm Lumbricus rubellus inhabiting an As-contaminated mine soil.

Research output: Contribution to journalJournal article


Journal publication date11/2009
JournalEnvironmental Pollution
Journal number11
Number of pages6
Original languageEnglish


Previous studies provided no unequivocal evidence demonstrating that field populations of Lumbricus rubellus Hoffmeister (1843), exhibit genetically inherited resistance to As-toxicity. In this study F1, F2 and F3 generation offspring derived from adults inhabiting As-contaminated field soil were resistant when exposed to 2000 mg kg−1 sodium arsenate. The offspring of uncontaminated adults were not As-resistant. Cocoon viability was 80% for F1 and 82% for F2 offspring from As-contaminated adults and 59% in the F1 control population. High energy synchrotron analysis was used to determine whether ligand complexation of As differed in samples of: resistant mine-site adults, the resistant F1 and F2 offspring of the mine-site earthworms exposed to the LC25 sodium arsenate (700 mg kg−1) of the F1 parental generation; and adult L. rubellus from an uncontaminated site exposed to LC25 concentrations of sodium arsenate (50 mg kg−1). XANES and EXAFS indicated that As was present as a sulfur-coordinated species. As-resistance in F1, F2 and F3 offspring of the earthworm Lumbricus rubellus.