Open AccessInactivation of delta‐endotoxin of Bacillus thuringiensis by tannin
Author(s) -
Lüthy Peter,
Hofmann Christina,
Jaquet Françoise
Publication year - 1985
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1985.tb00758.x
Subject(s) - bacillus thuringiensis , tannin , metabolite , condensed tannin , chemistry , proanthocyanidin , bacillales , biology , bacteria , microbiology and biotechnology , food science , biochemistry , botany , polyphenol , antioxidant , genetics , bacillus subtilis
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.