ArticleCurrent microbiology2025
Comprehensive Genomic Insights and Insecticidal Evaluation of Bacillus thuringiensis Strain T419 against Lepidopteran Pests.
Article in Current microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Controlling agricultural insect pests primarily depends on chemical insecticides, which pose environmental and health risks. This study comprehensively characterizes Bacillus thuringiensis (Bt) strain T419 and explores its potential as an eco-friendly biopesticide. Morphological analysis revealed diverse crystal structures including bipyramidal, spherical, and cuboidal shapes, indicative of broad insecticidal activity. SDS-PAGE confirmed the presence of key proteins corresponding to Cry1 (~ 130 kDa), Cry2 (~ 65 kDa), and Vip3 (~ 88 kDa), known for their efficacy against lepidopteran pests. PCR screening confirmed the presence of genes encoding these insecticidal proteins, such as cry1, cry1Ac, cry1Ab, cry2, cry2Aa, cry2Ab, and vip3A. Whole genome sequencing yielded a 6.4 Mb draft genome with 6,962 protein-coding sequences, including 2,327 hypothetical proteins, suggesting significant potential for novel gene discovery. Notably, 14 plasmids were identified which likely harboring key insecticidal genes. Bioassays demonstrated T419's effectiveness against economically important lepidopteran pests such as Spodoptera frugiperda (LC
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