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Isolates of Bacillus thuringiensis from Maranhão biomes with potential insecticidal action against Aedes aegypti larvae (Diptera, Culicidae)

التفاصيل البيبلوغرافية
العنوان: Isolates of Bacillus thuringiensis from Maranhão biomes with potential insecticidal action against Aedes aegypti larvae (Diptera, Culicidae)
المؤلفون: J. L. Viana, J. Soares-da-Silva, M. R. A. Vieira-Neta, W. P. Tadei, C. D. Oliveira, F. C. Abdalla, C. A. Peixoto, V. C. S. Pinheiro
المصدر: Brazilian Journal of Biology, Vol 81, Iss 1, Pp 114-124 (2020)
بيانات النشر: Instituto Internacional de Ecologia, 2020.
سنة النشر: 2020
المجموعة: LCC:Science
LCC:Biology (General)
LCC:Zoology
LCC:Botany
مصطلحات موضوعية: mosquito vectors, entomopathogenic bacterium, cry and cyt genes, histology, Science, Biology (General), QH301-705.5, Zoology, QL1-991, Botany, QK1-989
الوصف: Abstract Entomopathogenic agents are viable and effective options due to their selective action against insects but benign effects on humans and the environment. The most promising entomopathogens include subspecies of Bacillus thuringiensis (Bt), which are widely used for the biological control of insects, including mosquito vectors of human pathogens. The efficacy of B. thuringiensis toxicity has led to the search for new potentially toxic isolates in different regions of the world. Therefore, soil samples from the Amazon, Cerrado and Caatinga biomes of the state of Maranhão were evaluated for their potential larvicidal action against Aedes aegypti. The isolates with high toxicity to mosquito larvae, as detected by bioassays, were subjected to histological evaluation under a light microscope to identify the genes potentially responsible for the toxicity. Additionally, the toxic effects of these isolates on the intestinal epithelium were assessed. In the new B. thuringiensis isolates toxic to A. aegypti larvae, cry and cyt genes were amplified at different frequencies, with cry4, cyt1, cry32, cry10 and cry11 being the most frequent (33-55%) among those investigated. These genes encode specific proteins toxic to dipterans and may explain the severe morphological changes in the intestine of A. aegypti larvae caused by the toxins of the isolates.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1678-4375
1519-6984
Relation: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842021000100114&tlng=en; http://www.scielo.br/pdf/bjb/v81n1/1519-6984-bjb-1519-6984223389.pdf; https://doaj.org/toc/1678-4375
DOI: 10.1590/1519-6984.223389
URL الوصول: https://doaj.org/article/558a2c921f35456099812955cd8eb977
رقم الأكسشن: edsdoj.558a2c921f35456099812955cd8eb977
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:16784375
15196984
DOI:10.1590/1519-6984.223389