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Genes de germinação do Bacillus thuringiensis subsp. israelensis

Genes de germinação do Bacillus thuringiensis subsp. israelensis

Mostafa Abdoarrahem

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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Biologia, ciencias de la vida
ISBN:
9786209296819
58,88 €
IVA incluido
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O Bacillus thuringiensis subsp. israelensis é o inseticida biológico mais importante para o controlo de mosquitos vetores de doenças. Esta bactéria produz toxinas durante a esporulação que causam a morte das larvas por lise das células no seu intestino médio. O plasmídeo pBtoxis do B. thuringiensis subsp. israelensis codifica todas as toxinas mosquiticidas e várias outras sequências codificadoras. O plasmídeo também transporta genes de germinação potenciais organizados num único operon ger. A comparação das respostas de germinação de esporos de estirpes com e sem pBtoxis revelou que este plasmídeo poderia promover a ativação dos esporos em condições alcalinas, mas não após tratamento térmico. A introdução do operon ger num plasmídeo recombinante na estirpe sem plasmídeo estabeleceu este operon como o primeiro com um papel identificado na ativação alcalina.

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