Persistence and biological activity in soil of the insecticidal proteins from Bacillus thuringiensis, especially from transgenic plants

By G. Stotzky. Plant and Soil, 2005

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Release of the recombinant Cry3Bb1 protein of Bt maize MON88017 into field soil and detection of effects on the diversity of rhizosphere bacteria (2010, background): “As already reported for the Cry1Ab proteins from other Bt maize cultivars [46], the non-water extractable fraction of the soil adsorbed Cry3Bb1 can still maintain its full biological activity, as indicated by bioassays using a potato beetle [31].”
Transgenic Bt cotton has no apparent effect on enzymatic activities or functional diversity of microbial communities in rhizosphere soil (2006, unknown): “…Bt corn, it was possibly because a significantly higher content of lignin compared with non-Bt corn (Saxena and Stotzky 2001b), but for Bt canola, cotton, potato, rice, and tobacco, the reason was unclear (Stotzky 2004), thus, it should be more cautious to give a conclusion on Bt crop’s ecosafety.”