caa a22 4500 475746716 CHVBK 20180406123515.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s002840010116 doi (NATIONALLICENCE)springer-10.1007/s002840010116 Bhattacharya Pramatha R. Malaria Research Center, 22, Sham Nath Marg, Delhi-110 054, India, IN aut Hyper-Production of Insecticidal Crystal Protein (δ-Endotoxin)by Bacillus thuringiensis var. israelensis Is Not Related toSporulation-Specific Biochemical Functions [Elektronische Daten] [Pramatha R. Bhattacharya] Hypertoxic mutant strains of Bacillus thuringiensis var. israelensis were isolated by mutagenesis of the parent strain. The correlation, if any, between hyper-production of insecticidal crystal protein (δ-endotoxin) by hypertoxic mutant strains of Bacillus thuringiensis var. israelensis and sporulation-specific biochemical functions was studied. No increase in sporulation-specific biochemical markers was observed in the hypertoxic mutant strains. Asporogenous mutants of hypertoxic mutant strains blocked at different stages of sporulation were isolated, and larvicidal activity was studied. The hypertoxic parent strains and the sporulation-deficient, hypertoxic mutant strains showed almost identical larvicidal activity. Therefore, the increased production of toxin is not related to sporulation-specific biochemical changes. Springer-Verlag New York Inc., 2000 https://doi.org/10.1007/s002840010116 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s002840010116 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bhattacharya Pramatha R. Malaria Research Center, 22, Sham Nath Marg, Delhi-110 054, India, IN aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer