Search results for "1-1-1 Article périodique à comité de lecture"

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Effects of Bacillus thuringiensis δ-Endotoxins on the Pea Aphid ( Acyrthosiphon pisum )

2009

ABSTRACT Four Bacillus thuringiensis δ-endotoxins, Cry3A, Cry4Aa, Cry11Aa, and Cyt1Aa, were found to exhibit low to moderate toxicity on the pea aphid, Acyrthosiphon pisum , in terms both of mortality and growth rate. Cry1Ab was essentially nontoxic except at high rates. To demonstrate these effects, we had to use exhaustive buffer-based controls.

0106 biological sciencesHomopteraBacillus thuringiensismedicine.disease_cause01 natural sciencesApplied Microbiology and BiotechnologyHemolysin Proteins03 medical and health sciencesBacterial ProteinsBacillus thuringiensisBotanyInvertebrate MicrobiologymedicineAnimalsFood science030304 developmental biology0303 health sciencesAphidBacillaceaeBacillus thuringiensis ToxinsEcologybiologyToxinfungiPeasfood and beveragesAphididaebiology.organism_classificationSurvival AnalysisBacillales3. Good healthAcyrthosiphon pisumEndotoxins010602 entomologyAphids1-1-1 Article périodique à comité de lecture[SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/SymbiosisFood ScienceBiotechnologyApplied and Environmental Microbiology
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Identification of the Weevil immune genes and their expression in the bacteriome tissue

2008

Abstract Background Persistent infections with mutualistic intracellular bacteria (endosymbionts) are well represented in insects and are considered to be a driving force in evolution. However, while pathogenic relationships have been well studied over the last decades very little is known about the recognition of the endosymbionts by the host immune system and the mechanism that limits their infection to the bacteria-bearing host tissue (the bacteriome). Results To study bacteriome immune specificity, we first identified immune-relevant genes of the weevil Sitophilus zeamais by using suppressive subtractive hybridization (SSH) and then analyzed their full-length coding sequences obtained b…

PhysiologyPlant Scienceprotéines et peptides de signalisation intracellulaireStructural BiologyGene expressionlcsh:QH301-705.5Genetics0303 health sciencesAgricultural and Biological Sciences(all)EndosymbiosisReverse Transcriptase Polymerase Chain ReactionMicrobiology and ParasitologyIntracellular Signaling Peptides and ProteinsMicrobiologie et ParasitologielarveLarva1-1-1 Article périodique à comité de lectureInsect ProteinsGeneral Agricultural and Biological SciencesResearch ArticleBiotechnologyexpression géniquecharanconMolecular Sequence DatamuramidaseBiologyGeneral Biochemistry Genetics and Molecular BiologyMicrobiology03 medical and health sciencesAposymbioticcurculionidaeImmune systemEscherichia coliAnimalsGeneEcology Evolution Behavior and SystematicsAlphaproteobacteria030304 developmental biologyBiochemistry Genetics and Molecular Biology(all)030306 microbiologyTOLLIPIntracellular parasitefungiBacteriomeCell Biologybiochemical phenomena metabolism and nutritionGene Expression Regulationlcsh:Biology (General)WeevilsbacteriaCarrier ProteinsAntimicrobial Cationic Peptides[SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/SymbiosisDevelopmental BiologyBMC Biology
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Massive presence of insertion sequences in the genome of SOPE, the primary endosymbiont of the rice weevil Sitophilus oryzae

2008

Bacteria that establish an obligate intracellular relationship with eukaryotic hosts undergo an evolutionary genomic reductive process. Recent studies have shown an increase in the number of mobile elements in the first stage of the adaptive process towards intracellular life, although these elements are absent in ancient endosymbionts. Here, the genome of SOPE, the obligate mutualistic endosymbiont of rice weevils, was used as a model to analyze the initial events that occur after symbiotic integration. During the first phases of the SOPE genome project, four different types of insertion sequence (IS) elements, belonging to well-characterized IS families from γ-proteobacteria, were identif…

Sitophilus oryzae (rice weevil)Insecta[SDV]Life Sciences [q-bio]MESH: Genome BacterialMESH: WeevilsEvolution MolecularOpen Reading FramesMESH: Insects:CIENCIAS DE LA VIDA::Microbiología [UNESCO]SOPE (Sitophilus oryzae primary endosymbiont) ; Sitophilus oryzae (rice weevil) ; Insertion sequences (IS) ; EndosymbiosisAnimalsMESH: AnimalsSymbiosisUNESCO::CIENCIAS DE LA VIDA::MicrobiologíaMESH: Evolution MolecularMESH: SymbiosisEndosymbiosisSOPE (Sitophilus oryzae primary endosymbiont)Oryza[SDV.EE.IEO] Life Sciences [q-bio]/Ecology environment/SymbiosisMESH: Open Reading FramesMESH: Oryza sativaInsertion sequences (IS)Mutagenesis InsertionalMESH: GammaproteobacteriaMESH: Mutagenesis Insertional1-1-1 Article périodique à comité de lectureWeevilsGammaproteobacteriaGenome Bacterial[SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis
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