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Abstract
Chlorpyrifos is one of the commonly used organophosphorus insecticides that are implicated in serious environmental and human health problems. To evaluate plant potential for uptake of chlorpyrifos, several plant species of poplar (Populus sp.) and willow (Salix sp.) were investigated. Chlorpyrifos was taken up from nutrient solution by all seven plant species. Significant amounts of chlorpyrifos accumulated in plant tissues, and roots accumulated higher concentrations of chlorpyrifos than did shoots. Chlorpyrifos did not persist in the plant tissues, suggesting further metabolism of chlorpyrifos in plant tissue. To our knowledge, this work represents the first report for phytoremediation of chlorpyrifos using poplar and willow plants.
ACKNOWLEDGMENTS
The authors are grateful to Jud Isebrands and Prof. Steve Strauss for providing us plant cuttings and to Prof. Clement E. Furlong for his inspiring guidance and suggestions in the completion of this manuscript. We are also thankful to Peter F. Andeer for providing us useful advice and technical support for HPLC analysis. This work was sponsored by the University of Washington Superfund Research Program (SRP), Grant # NIEHS P42ES04696.