Molecular characterization of Bacillus thuringiensis strains from Argentina. Franco-Rivera, A., Benintende, G., Cozzi, J., Baizabal-Aguirre, V., M., Valdez-Alarcón, J., J., & López-Meza, J., E. Antonie van Leeuwenhoek, 86(1):87-92, Springer Netherlands, 7, 2004. Paper abstract bibtex Bacillus thuringiensis INTA 7-3, INTA 51-3, INTA Mo9-5 and INTA Mo14-4 strains were obtained from Argentina and characterized by determination of serotype, toxicity, plasmid composition, insecticidal gene content ( cry and vip ) and the cloning of the single- vip3A gene of the INTA Mo9-5 strain. The serotype analysis identified the serovars tohokuensis and darmstadiensis for the INTA 51-3 and INTA Mo14-4 strains, respectively, whereas the INTA Mo9-5 strain was classified as "autoagglutinated". In contrast to the plasmid patterns of INTA 7-3, INTA 51-3 and INTA Mo9-5 (which were similar to B. thuringiensis HD-1 strain), strain INTA Mo14-4 showed a unique plasmid array. PCR analysis of the four strains revealed the presence of cry genes and vip3A genes. Interestingly, it was found that B. thuringiensis 4Q7 strain, which is a plasmid cured strain, contained vip3A genes indicating the presence of these insecticidal genes in the chromosome. Bioassays towards various lepidopteran species revealed that B. thuringiensis INTA Mo9-5 and INTA 7-3 strains were highly active. In particular, the mean LC(50) obtained against A. gemmatalis larvae with the INTA Mo9-5 and INTA 7-3 strains were 7 (5.7-8.6) and 6.7 (5.6-8.0) ppm, respectively. The INTA Mo14-4 strain was non-toxic and strain INTA 51-3 showed only a weak larvicidal activity.
@article{
title = {Molecular characterization of Bacillus thuringiensis strains from Argentina.},
type = {article},
year = {2004},
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keywords = {Animals,Argentina,Bacillus thuringiensis,Bacillus thuringiensis: classification,Bacillus thuringiensis: genetics,Bacillus thuringiensis: isolation & purification,Bacillus thuringiensis: physiology,Bacterial Proteins,Bacterial Proteins: genetics,Bacterial Toxins,Bacterial Toxins: genetics,Bacterial Toxins: toxicity,Chromosomes, Bacterial,Chromosomes, Bacterial: genetics,DNA, Bacterial,DNA, Bacterial: chemistry,DNA, Bacterial: isolation & purification,Genes, Bacterial,Insecticides,Insecticides: metabolism,Insecticides: pharmacology,Larva,Larva: growth & development,Larva: microbiology,Lepidoptera,Lepidoptera: growth & development,Lepidoptera: microbiology,Molecular Sequence Data,Pest Control, Biological,Pest Control, Biological: methods,Phylogeny,Plasmids,Restriction Mapping,Sequence Analysis, DNA,Serotyping},
pages = {87-92},
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month = {7},
publisher = {Springer Netherlands},
day = {1},
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abstract = {Bacillus thuringiensis INTA 7-3, INTA 51-3, INTA Mo9-5 and INTA Mo14-4 strains were obtained from Argentina and characterized by determination of serotype, toxicity, plasmid composition, insecticidal gene content ( cry and vip ) and the cloning of the single- vip3A gene of the INTA Mo9-5 strain. The serotype analysis identified the serovars tohokuensis and darmstadiensis for the INTA 51-3 and INTA Mo14-4 strains, respectively, whereas the INTA Mo9-5 strain was classified as "autoagglutinated". In contrast to the plasmid patterns of INTA 7-3, INTA 51-3 and INTA Mo9-5 (which were similar to B. thuringiensis HD-1 strain), strain INTA Mo14-4 showed a unique plasmid array. PCR analysis of the four strains revealed the presence of cry genes and vip3A genes. Interestingly, it was found that B. thuringiensis 4Q7 strain, which is a plasmid cured strain, contained vip3A genes indicating the presence of these insecticidal genes in the chromosome. Bioassays towards various lepidopteran species revealed that B. thuringiensis INTA Mo9-5 and INTA 7-3 strains were highly active. In particular, the mean LC(50) obtained against A. gemmatalis larvae with the INTA Mo9-5 and INTA 7-3 strains were 7 (5.7-8.6) and 6.7 (5.6-8.0) ppm, respectively. The INTA Mo14-4 strain was non-toxic and strain INTA 51-3 showed only a weak larvicidal activity.},
bibtype = {article},
author = {Franco-Rivera, Alejandro and Benintende, Graciela and Cozzi, Jorge and Baizabal-Aguirre, Victor Manuel and Valdez-Alarcón, Juan José and López-Meza, Joel Edmundo},
journal = {Antonie van Leeuwenhoek},
number = {1}
}
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The serotype analysis identified the serovars tohokuensis and darmstadiensis for the INTA 51-3 and INTA Mo14-4 strains, respectively, whereas the INTA Mo9-5 strain was classified as \"autoagglutinated\". In contrast to the plasmid patterns of INTA 7-3, INTA 51-3 and INTA Mo9-5 (which were similar to B. thuringiensis HD-1 strain), strain INTA Mo14-4 showed a unique plasmid array. PCR analysis of the four strains revealed the presence of cry genes and vip3A genes. Interestingly, it was found that B. thuringiensis 4Q7 strain, which is a plasmid cured strain, contained vip3A genes indicating the presence of these insecticidal genes in the chromosome. Bioassays towards various lepidopteran species revealed that B. thuringiensis INTA Mo9-5 and INTA 7-3 strains were highly active. In particular, the mean LC(50) obtained against A. gemmatalis larvae with the INTA Mo9-5 and INTA 7-3 strains were 7 (5.7-8.6) and 6.7 (5.6-8.0) ppm, respectively. 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