title: Isolation and curing of plasmid DNA from Bacillus thuringiensis israelensis strains showing variable insecticidal activities.
abstract: Bacillus thuringiensis israelensis 4Q1-WT (B.t.i.) have 9 plasmids. Fourteen mutates of this wild type were prepared with cured plasmids. The wild bacterial strain the mutants and fourteen industrial strains were compared according to the number, size of plasmids and their potential to induce mortality to Aedes caspius larvae. The 108 Kb plasmid is essential for B.t israelensis to induce insect kill.
authors: Department of Entomology, Faculty of Science, Ain Shams University, Cairo.
authors: M H
authors: MH
authors: Rady
authors: T A
authors: TA
authors: Younis
mesh_terms: D000330:Aedes; D000818:Animals; D001413:Bacillus thuringiensis / Q000235:genetics* / Q000302:isolation & purification; D001427:Bacterial Toxins / Q000235:genetics*; D004731:Endotoxins / Q000235:genetics*; D007814:Larva; D016296:Mutagenesis; D010572:Pest Control, Biological; D010957:Plasmids
chemical_list: D001427:Bacterial Toxins; D004731:Endotoxins