Prodigiosin produced by Serratia marcescens enhances the insecticidal activity of Bacillus thuringiensis delta-endotoxin (CrylC) against common cutworm, Spodoptera litura
1999
Asano, S. (Kubota Corp., Ryugasaki, Ibaraki (Japan)) | Ogiwara, K. | Nakagawa, Y. | Suzuki, K. | Hori, H. | Watanabe, T.
Synergistic effects of chitinases A, B and C1, chitin binding protein and prodigiosin from Serratia marcescens on the insecticidal activity of delta-endotoxin, Cry 1C, of Bacillus thuringiensis against the common cutworm, Spodoptera litura, were investigated. Only prodigiosin showed a potent synergistic activity with Cry 1C 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 Cry 1C was described. The supernatants from S. marcescens and partially purified prodigiosin showed a similar synergistic activity on the insecticidal activity of Cry 1C. The content of prodigiosin in the supernatants was estimated as 10% according to the absorbance at 467 nm where prodigiosin showed a peak and the content seemed to be enough to explain the synergistic activity of the supernatants on the activity of Cry 1C
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