Molecular characterization of pyrethroid resistance in the olive fruit fly Bactrocera oleae
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PROVIDER: PRJNA445067 | ENA |
REPOSITORIES: ENA
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Project description:Α reduction of pyrethroid efficacy has been recently recorded in the olive fruit fly Bactrocera oleae, the most destructive insect pest of olives worldwide. We analyzed the transcriptomic differences between two highly pyrethroid resistant populations versus a relatively susceptible field population and two laboratory strains to gain more insight into the molecular mechanism of resistance. A large number of genes was found to be significantly differentially transcribed across the pairwise comparisons between resistant and susceptible insect populations. Interestingly, gene set analysis revealed that genes of the ‘electron carrier activity’ GO group were enriched in one specific pairwise transcriptomic comparison. As P450 monooxygenase enzymes are typically associated with this Molecular Function GO-group, this might reflect a P450-mediated resistance mechanism. These results suggest that transcriptional induction of the CYP6 P450s might be an important mechanism of pyrethroid resistance in B. oleae and pave the way for the development of synergists and molecular diagnostics for insecticide resistance management.
2018-05-12 | GSE112178 | GEO
Project description:Comparative profiling of damaged (pool of different stages of fly attack) and control undamaged fruits of cv Ortice and cv Ruveia (Olea europaea L.), characterized by a different tolerance to Bactrocera oleae, generated a comprehensive repertory of transcripts useful to study the genes modulated by Bactrocera oleae attack.
2017-05-06 | GSE81296 | GEO
Project description:we used an integrated approach for the elucidation of the reproductive system and mating procedures of the olive fruit fly, Bactrocera oleae. Initially, we performed RNAseq analysis in reproductive tissues of virgin and mated insects. Comparison of the transcriptomes resulted in the identification of genes that are differentially expressed after mating.
2021-02-18 | GSE166965 | GEO
Project description:The strictly monophagous olive fruit fly, Bactrocera oleae, represents the major pest of olive orchards worldwide. It has the unique ability to hydrolyze olive proteins as well as to overcome olive defenses, especially the high levels of phenolic compounds present in the green olive mesocarp. In this study, we aimed to identify specific genes potentially implicated in overcoming green olive defense and the utilization of the flesh, by examining larval responses to green olives on the transcript level. Focusing on the up-regulated gene set, we identified two putative serine proteases and one putative UDP-glycosyltransferase possibly associated with these traits. Serine proteases could be involved in the digestion of dietary proteins but also could represent a mechanism to overcome the effect of trypsin inhibitors induced by the olive fruit upon attack. UDP-glycosyltransferase may be implicated in the sequestration and/ or direct detoxification of phenolic compounds highly present in green olives.
2017-05-12 | GSE82037 | GEO
Project description:BackgroundThe fruit fly Bactrocera oleae is the primary biotic stressor of cultivated olives, causing direct and indirect damages that significantly reduce both the yield and the quality of olive oil. To study the olive-B. oleae interaction, we conducted transcriptomic and proteomic investigations of the molecular response of the drupe. The identifications of genes and proteins involved in the fruit response were performed using a Suppression Subtractive Hybridisation technique and a combined bi-dimensional electrophoresis/nanoLC-ESI-LIT-MS/MS approach, respectively.ResultsWe identified 196 ESTs and 26 protein spots as differentially expressed in olives with larval feeding tunnels. A bioinformatic analysis of the identified non-redundant EST and protein collection indicated that different molecular processes were affected, such as stress response, phytohormone signalling, transcriptional control and primary metabolism, and that a considerable proportion of the ESTs could not be classified. The altered expression of 20 transcripts was also analysed by real-time PCR, and the most striking differences were further confirmed in the fruit of a different olive variety. We also cloned the full-length coding sequences of two genes, Oe-chitinase I and Oe-PR27, and showed that these are wound-inducible genes and activated by B. oleae punctures.ConclusionsThis study represents the first report that reveals the molecular players and signalling pathways involved in the interaction between the olive fruit and its most damaging biotic stressor. Drupe response is complex, involving genes and proteins involved in photosynthesis as well as in the production of ROS, the activation of different stress response pathways and the production of compounds involved in direct defence against phytophagous larvae. Among the latter, trypsin inhibitors should play a major role in drupe resistance reaction.
| S-EPMC3733423 | biostudies-literature
Project description:In most diploid organisms, mating is a prerequisite for reproduction and, thus, critical to the maintenance of their population and the perpetuation of the species. Besides the importance of understanding the fundamentals of reproduction, targeting the reproductive success of a pest insect is also a promising method for its control, as a possible manipulation of the reproductive system could affect its destructive activity. Here, we used an integrated approach for the elucidation of the reproductive system and mating procedures of the olive fruit fly, Bactrocera oleae. Initially, we performed a RNAseq analysis in reproductive tissues of virgin and mated insects. A comparison of the transcriptomes resulted in the identification of genes that are differentially expressed after mating. Functional annotation of the genes showed an alteration in the metabolic, catalytic, and cellular processes after mating. Moreover, a functional analysis through RNAi silencing of two differentially expressed genes, yellow-g and troponin C, resulted in a significantly reduced oviposition rate. This study provided a foundation for future investigations into the olive fruit fly's reproductive biology to the development of new exploitable tools for its control.
| S-EPMC7997189 | biostudies-literature
Project description:Bactrocera oleae Transcriptome or Gene expression
| PRJNA196340 | ENA
Project description:Bacteria associated with Bactrocera oleae Raw sequence reads
| PRJNA321174 | ENA
Project description:Following cultivation-dependent and -independent techniques, we investigated the microbiota associated with Bactrocera oleae, one of the major agricultural pests in olive-producing countries. Bacterial 16S rRNA gene libraries and ultrastructural analyses revealed the presence of several bacterial taxa associated with this insect, among which Acetobacter tropicalis was predominant. The recent increased detection of acetic acid bacteria as symbionts of other insect model organisms, such as Anopheles stephensi (G. Favia et al., Proc. Natl. Acad. Sci. USA 104:9047-9051, 2007) or Drosophila melanogaster (C. R. Cox and M. S. Gilmore, Infect. Immun. 75:1565-1576, 2007), prompted us to investigate the association established between A. tropicalis and B. oleae. Using an A. tropicalis-specific PCR assay, the symbiont was detected in all insects tested originating from laboratory stocks or field-collected from different locations in Greece. This acetic acid bacterium was successfully established in cell-free medium, and typing analyses, carried out on a collection of isolates, revealed that different A. tropicalis strains are present in fly populations. The capability to colonize and lodge in the digestive system of both larvae and adults and in Malpighian tubules of adults was demonstrated by using a strain labeled with a green fluorescent protein.
| S-EPMC2681620 | biostudies-literature