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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hung, T. P. Truong, L. V. Binh, N. D. Frutos, R. Quiquampoix, H. Staunton, S. |
| Description | Author Affiliation: Hung TP ( INRA, UMR Eco&Sols, INRA-IRD-Cirad-SupAgro, 2 Place Viala, 34060 Montpellier, France); Truong LV ( INRA, UMR Eco&Sols, INRA-IRD-Cirad-SupAgro, 2 Place Viala, 34060 Montpellier, France); Binh ND ( Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi, Viet Nam.); Frutos R ( Cirad, UMR17, Intertryp, Cirad-IRD, TA-A17/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France); Quiquampoix H ( INRA, UMR Eco&Sols, INRA-IRD-Cirad-SupAgro, 2 Place Viala, 34060 Montpellier, France.); Staunton S ( INRA, UMR Eco&Sols, INRA-IRD-Cirad-SupAgro, 2 Place Viala, 34060 Montpellier, France. Electronic address: staunton@montpellier.inra.fr.) |
| Abstract | Insecticidal Cry, or Bt, proteins are produced by the soil-endemic bacterium, Bacillus thuringiensis and some genetically modified crops. Their environmental fate depends on interactions with soil. Little is known about the toxicity of adsorbed proteins and the change in toxicity over time. We incubated Cry1Ac and Cry2A in contrasting soils subjected to different treatments to inhibit microbial activity. The toxin was chemically extracted and immunoassayed. Manduca sexta was the target insect for biotests. Extractable toxin decreased during incubation for up to four weeks. Toxicity of Cry1Ac was maintained in the adsorbed state, but lost after 2 weeks incubation at 25 °C. The decline in extractable protein and toxicity were much slower at 4 °C with no significant effect of soil sterilization. The major driving force for decline may be time-dependent fixation of adsorbed protein, leading to a decrease in the extraction yield in vitro, paralleled by decreasing solubilisation in the larval gut. |
| File Format | HTM / HTML |
| ISSN | 02697491 |
| Issue Number | Pt B |
| Volume Number | 208 |
| e-ISSN | 18736424 |
| Journal | Environmental Pollution |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Discipline Science Environmental Monitoring Insecticides Analysis Pesticide Residues Adsorption Animals Bacillus Thuringiensis Bacterial Proteins Toxicity Crops, Agricultural Metabolism Endotoxins Hemolysin Proteins Insects Larva Manduca Soil Chemistry Soil Microbiology Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Pollution Medicine Toxicology |
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