Inactivation of delta-endotoxin of Bacillus thuringiensis by tannin |
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| Authors: | Peter Lü thy,Christina Hofmann,Franç oise Jaquet |
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| Affiliation: | Institute of Microbiology, Swiss Federal Institute of Technology, 8092 Zurich, Switzerland |
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| Abstract: | Abstract Tannin, an important constituent of many plants, reacted strongly with the proteinaceous insecticidal metabolite of Bacillus thuringiensis . Solutions of a commercial tannin preparation stopped the activity of dissolved crystal protein and activated δ-endotoxin. Intact crystals lost their activity only partially in the presence of tannin. Interaction between host plant tannins and δ-endotoxin might be a major factor where the field efficacy of B. thuringiensis preparations is unexpectedly low. |
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| Keywords: | Polyphenol-protein interaction field inactivation of delta-endotoxin |
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