Enhancing the insecticidal activity of new Bacillus thuringiensis X023 by copper ions.
Zhuolin LiuJunyan XieZiru DengMulan WangDandan DangSha LuoYunfeng WangYunjun SunLiqiu XiaXue Zhi DingPublished in: Microbial cell factories (2020)
The new strain BtX023 exerted a strong insecticidal effect on P. xylostella by producing ICPs. The addition of 1 × 10-5 M Cu2+ in the medium could considerably enhance the expression of the cry1Ac and vip3Aa genes, thereby further increasing the toxicity of BtX023 to Helicoverpa armigera and P. xylostella by enhancing energy synthesis, the glyoxylate cycle, and branched-chain amino acids synthesis, but not poly-β-hydroxy butyrate synthesis.