Abstract
The effects of media composition on growth parameters, total protein production (including delta-endotoxin) and its relation to the biological properties ofBacillus thuringiensis var.israelensis was investigated. The replacement of glucose by glycerol as the carbon source yielded higher concentrations of delta-endotoxin. This increase in toxicity was associated with increased amounts of the 130 kDa polypeptide fraction. The biocide activity was not related to haemolytic activity. specific growth rate nor spore count.
Résumé
On a étudié les effets de la composition du milieu sur les paramètres de croissance, sur la production de protéines totales, ce qui inclut la delta-endotoxine, ainsi que sur sa relation avec les propriétés biologiques deBacillus thuringiensis var.israelensis. Le remplacement du glucose par le glycerol comme source de carbone resulte en des concentrations plus élevées de delta-endotoxine. Cet accroissement en toxicité est associé avec une quantité croissante de la fraction polypeptidique de 130 kDa. L'activité biocide n'est liée ni à l'activité hémolytique, ni à la vitesse specifique de croissance ni à l'énumération des spores.
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Faloci, M.M., Yantorno, O.M., Marino, H.A. et al. Effect of the media composition on the growth parameters and biological properties ofBacillus thuringiensis var.israelensis delta-endotoxin. World J Microbiol Biotechnol 6, 32–38 (1990). https://doi.org/10.1007/BF01225352
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DOI: https://doi.org/10.1007/BF01225352