The mobility and persistence of the insecticidal Cry1Aa toxin, Bt <em>(Bacillus thuringiensi</em>s) in soils - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Papers Year : 2010

The mobility and persistence of the insecticidal Cry1Aa toxin, Bt (Bacillus thuringiensis) in soils

Abstract

The rapid worldwide expansion of genetically modified crops containing the Bt trait gives rise for concern as to the possible impact on non target species. These plants release insecticidal proteins, known as cry into soil during growth and decomposition of crop residues. The fate of the toxin is strongly influenced by its interactions with soil, in particular adsorption which modifies its biological properties, its mobility and its persistence. We describe three series of studies to investigate (i) the adsorption properties (ii) the mobility of the adsorbed protein and (iii) the decline of toxin in soil as a function of time and microbial activity. We conclude that the toxin will be strongly immobilised in soil and that microbial degradation does not determine the observed decline of toxin over periods of weeks and months.
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Dates and versions

hal-02757266 , version 1 (04-06-2020)

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  • HAL Id : hal-02757266 , version 1
  • PRODINRA : 269564

Cite

Nordine Helassa, Sylvie Noinville, Philippe Dejardin, Herve Quiquampoix, Siobhan Staunton. The mobility and persistence of the insecticidal Cry1Aa toxin, Bt (Bacillus thuringiensis) in soils. 19. World Congress of Soil Science; Soil Solutions for a Changing World, Aug 2010, Brisbane, Australia. ⟨hal-02757266⟩
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