Screening rhizosphere soil samples for the ability to mineralize elevated concentrations of atrazine and metolachlor
- 1 January 1995
- journal article
- research article
- Published by Taylor & Francis in Journal of Environmental Science and Health, Part B
- Vol. 30 (4) , 473-484
- https://doi.org/10.1080/03601239509372948
Abstract
Rhizosphere soils from several plant species were tested for their ability to mineralize atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐s‐triazine) or metolachlor (2‐chloro‐N‐(2‐ethyl‐6‐methylphenyl)‐N‐(2‐methoxy‐1‐methylethyl)acetamide) at concentrations typical of point‐source contamination (50 μg/g). Rhizosphere soils were collected from the root zone of plants in areas with previous herbicide exposure. Several rhizosphere soils tested positive for 14C‐atrazine mineralization (≥ 8.5%) including kochia (Kochia scoparia), lambsquarters (Chenopodium berlandieri), foxtail barley (Hordeum jubatum), witchgrass (Panicum capillare), catnip (Nepeta cataría), and musk thistle (Carduus nutans). None of the 15 rhizosphere samples tested was capable of significant (≥ 8.5%) 14C‐metolachlor mineralization. The results on atrazine mineralization suggest that certain plants at pesticide‐contaminated sites might be managed to facilitate microbial detoxication of unwanted organic compounds in soil.Keywords
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