Recombinant Cry1Ia protein is highly toxic to cotton boll weevil (Anthonomus grandis Boheman) and fall armyworm (Spodoptera frugiperda)
| Autor: | Érica Soares Martins, Raimundo Wagner de Souza Aguiar, N. F. Martins, Rosana Falcão, Ana Cristina M. M. Gomes, Rose Gomes Monnerat, Bergmann Morais Ribeiro, V. Melatti |
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| Rok vydání: | 2008 |
| Předmět: |
Insecticides
viruses Bacterial Toxins Molecular Sequence Data Bacillus thuringiensis Gene Expression Genetically modified crops Spodoptera medicine.disease_cause Transfection Applied Microbiology and Biotechnology Microbiology Bacterial Proteins parasitic diseases Botany medicine Animals Cloning Molecular Intestinal Mucosa Gossypium biology Base Sequence Toxin fungi Midgut General Medicine biology.organism_classification Recombinant Proteins Intestines Anthonomus Larva Microscopy Electron Scanning Noctuidae Fall armyworm Weevils Biological Assay Baculoviridae Biotechnology |
| Zdroj: | Journal of applied microbiology. 104(5) |
| ISSN: | 1365-2672 |
| Popis: | Aims: To evaluate the activity of cry1Ia gene against cotton pests, Spodoptera frugiperda and Anthonomus grandis. Methods and Results: Had isolated and characterized a toxin gene from the Bacillus thuringiensis S1451 strain which have been previously shown to be toxic to S. frugiperda and A. grandis. The toxin gene (cry1Ia) was amplified by PCR, sequenced, and cloned into the genome of a baculovirus. The Cry1Ia protein was expressed in baculovirus infected insect cells, producing protein inclusions in infected cells. The Cry1Ia protein has used in bioassays against to S. frugiperda and A. grandis. Conclusions: Bioassays using the purified recombinant protein showed high toxicity to S. frugiperda and A. grandis larvae. Molecular modelling of the Cry1Ia protein translated from the DNA sequence obtained in this work, showed that this protein possibly posses a similar structure to the Cry3A protein. Ultrastructural analysis of midgut cells from A. grandis incubated with the Cry1Ia toxin, showed loss of microvilli integrity. Significance and Impact of the Study: The results indicate that the cry1Ia is a good candidate for the construction of transgenic plants resistant to these important cotton pests. |
| Databáze: | OpenAIRE |
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