Cross-resistance and mechanism of resistance to Cry1Ab toxin from Bacillus thuringiensis in a field-derived strain of European corn borer, Ostrinia nubilalis

dc.creatorPereira, Eliseu J.G.
dc.creatorCrespo, André L.B.
dc.creatorRodrigo-Simón, Ana
dc.creatorSiqueira, Herbert A.A.
dc.creatorFerré, Juan
dc.creatorSiegfried, Blair D.
dc.date2018-08-30T12:06:27Z
dc.date2018-08-30T12:06:27Z
dc.date2011-07
dc.date.accessioned2023-09-27T21:48:49Z
dc.date.available2023-09-27T21:48:49Z
dc.identifier00222011
dc.identifierhttps://doi.org/10.1016/j.jip.2011.04.007
dc.identifierhttp://www.locus.ufv.br/handle/123456789/21535
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8966517
dc.descriptionThe cross-resistance spectrum and biochemical mechanism of resistance to the Bacillus thuringiensis Cry1Ab toxin was studied in a field-derived strain of Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae) that was further selected in the laboratory for high levels (>1000-fold) of resistance to Cry1Ab. The resistant strain exhibited high levels of cross-resistance to Cry1Ac and Cry1Aa but only low levels of crossresistance (<4-fold) to Cry1F. In addition, there was no significant difference between the levels of resistance to full-length and trypsin-activated Cry1Ab protein. No differences in activity of luminal gut proteases or altered proteolytic processing of the toxin were observed in the resistant strain. Significantly reduced binding of radiolabeled Cry1Aa was observed in the resistant strain whereas binding of Cry1Ab and Cry1Ac was practically the same in both resistant and susceptible strains. The interpretation of the overall data seems to suggest the involvement of an alteration in the binding of Cry1A toxins to a common receptor, which is more clearly revealed by the binding assays using radiolabeled Cry1Aa.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherJournal of Invertebrate Pathology
dc.relationv. 107, n. 3, p. 185- 192, jul. 2011
dc.rightsElsevier Inc.
dc.subjectBacillus thuringiensis
dc.subjectBt maize
dc.subjectOstrinia nubilalis
dc.subjectResistance
dc.subjectToxin binding
dc.subjectLuminal gut proteases
dc.titleCross-resistance and mechanism of resistance to Cry1Ab toxin from Bacillus thuringiensis in a field-derived strain of European corn borer, Ostrinia nubilalis
dc.typeArtigo


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