Prodigiosin Produced by <i>Serratia marcescens</i> Enhances the Insecticidal Activity of <i>Bacillus thuringiensis</i> delta-Endotoxin (Cry1C) against Common Cutworm, <i>Spodoptera litura</i>

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  • <i>Serratia marcescens</i> の生産するプロディギオシンがハスモンヨトウに対する <i>Bacillus thuringiensis</i> Cry1C 内毒素の殺虫活性を増大させる
  • Prodigiosin Produced by Serratia marcescens Enhances the Insecticidal Activity of Bacillus thuringiensis delta-Endotoxin(Cry1C)against Common Cutworm,Spodoptera Litura

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Synergistic effects of chitinases A, B and C1, chitin binding protein and prodigiosin from Serratia marcescens on the insecticidal activity of delta-endotoxin, Cry1C, of Bacillus thuringiensis against the common cutworm, Spodoptera litura, were investigated. Only prodigiosin showed a potent synergistic activity with Cry1C on both the lethal and growth inhibitory activity. In the previous paper (Asano et al., 1999) a synergistic effect in the supernatants of S. marcescens culture on the Insecticidal activity of Cry1C was described. The supernatants from S. marcescens and partially purified prodigiosin showed a similar synergistic activity on the Insecticidal activity of Cry1C. The content of prodigiosin in the supernatants was estimated as 10% according to the absorbance at 467nm where prodigiosin showed a peak and the content seemed to be enough to explain the synergistic activity of the supernatants on the activity of Cry1C.

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