6533b861fe1ef96bd12c45bd
RESEARCH PRODUCT
Specific binding of Bacillus thuringiensis Cry1Ea toxin, and Cry1Ac and Cry1Fa competition analyses in Anticarsia gemmatalis and Chrysodeixis includens
Yolanda BelKenneth E. NarvaBaltasar EscricheMarc D. Zacksubject
0106 biological sciences0301 basic medicineBrush borderlcsh:MedicineMoths01 natural sciencesArticleMicrobiologyApplied microbiology03 medical and health sciencesHemolysin ProteinsBacterial ProteinsChrysodeixis includensBacillus thuringiensisEnvironmental biotechnologyAnimalsCaterpillarlcsh:ScienceMultidisciplinaryBinding SitesbiologyBacillus thuringiensis ToxinsMicrovillifungilcsh:Rfood and beveragesMidgutbiology.organism_classificationEndotoxins010602 entomologyAnticarsia gemmatalis030104 developmental biologyCry1AcBiological Control AgentsLarvaBiological Assaylcsh:QPEST analysisSoybeansdescription
AbstractAnticarsia gemmatalis (velvetbean caterpillar) and Chrysodeixis includens (soybean looper) are two important defoliation pests of soybeans. In the present study, we have investigated the susceptibility and brush border membrane-binding properties of both species to Bacillus thuringiensis Cry1Ea toxin. Bioassays performed in first-instar larvae demonstrated potent activity against both soybean pests in terms of mortality or practical mortality. Competition-binding studies carried out with 125Iodine-labelled Cry1Ea, demonstrated the presence of specific binding sites on the midgut brush border membrane vesicles (BBMV) of both insect species. Heterologous competition-binding experiments indicated that Cry1Ea does not share binding sites with Cry1Ac or Cry1Fa in either soybean pest. This study contributes to the knowledge of Cry1Ea toxicity and midgut binding sites in A. gemmatalis and C. includens and sheds light on the cross-resistance potential of Cry1Ea with other Bt proteins aimed at controlling lepidopteran pests in soybeans.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-03-18 | Scientific Reports |