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Citrate-Mediated Increase in the Uptake of Weathered 2,2-bis(p-Chlorophenyl)1,2-Dichloroethylene Residues by Plants
The ability of four crops-crimson clover, mustard, hairy vetch, and ryegrass-to remove p,p'-DDE from soil was investigated, along with the effect of citrate amendment on the process. The roots of all plants contained significant levels of p,p'-DDE, with water-amended roots containing two t...
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Published in: | Environmental toxicology and chemistry 2002-03, Vol.21 (3), p.550-550 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | The ability of four crops-crimson clover, mustard, hairy vetch, and ryegrass-to remove p,p'-DDE from soil was investigated, along with the effect of citrate amendment on the process. The roots of all plants contained significant levels of p,p'-DDE, with water-amended roots containing two to five times the amount found in the bulk soil. Treatment with 0.05 M citrate significantly increased the uptake of the compound from soil by clover, vetch, and mustard, but no relationship was discerned between citrate treatment and the extent of p,p'-DDE transport to aerial tissues. It was hypothesized that certain root exudates chelated critical structural metal ions from soil, thereby promoting the partial dissolution of the soil organic matter and subsequent increase in the availability of the anthropogenic pollutant. |
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ISSN: | 0730-7268 |