Journal of Applied Microbiology (2008) 104, 1363-1371

É.S. Martins, R.W.d.S. Aguiar, N.F. Martins, V.M. Melatti, R. Falcão, A.C.M.M. Gomes, B.M. Ribeiro and R.G. Monnerat (2008)
Recombinant Cry1Ia protein is highly toxic to cotton boll weevil (Anthonomus grandis Boheman) and fall armyworm (Spodoptera frugiperda)
Journal of Applied Microbiology 104 (5), 1363-1371
Abstract: 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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Bergmann Morais Ribeiro

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
molecular biology - genes
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Anthonomus grandis	Cotton (Gossypium)
	Spodoptera frugiperda	Cotton (Gossypium)
Bacillus thuringiensis Cry1I-toxin (entomopathogen)	Anthonomus grandis
Bacillus thuringiensis Cry1I-toxin (entomopathogen)	Spodoptera frugiperda