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| Author(s): |
João Paulo Leite Tozzi
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI) |
| Defense date: | 2009-12-10 |
| Examining board members: |
Itamar Soares de Melo;
Gabriel Padilla Maldonado;
Manoel Araujo Teixeira
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| Advisor: | Itamar Soares de Melo |
| Abstract | |
Bacillus thuringiensis is a bacterium that forms the Cry1Ac protein, toxic to lepidopteran. Genetically modify plants expressing this toxin. The objective of this work was the isolation and identification bacteria from soil cultivated with transgenic cotton and conventional with potential degradation of this protein. We studied the dynamics growth from bacteria in media with the Cry1Ac protein or glucose, the biodegradation genes apr, npr and sub. In soil of conventional cotton, count was lower, for Bt cotton were higher. Six strains were identified. The growth bacterium B. pumilus was higher in medium with the Cry1Ac protein than bacteria with glucose and G. rubripertincta in medium containing glucose had higher growth than the Cry1Ac protein. Were verified Cry1Ac protein degradation by the bacteria Bp and Gr. Genes apr and sub were detected in soil with transgenic plant and the gene npr were not. (AU) | |