Dataset Information

Transcriptional profiling of the pest Bactrocera oleae feeding on phenolic rich green olives

ABSTRACT: 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.

ORGANISM(S): Bactrocera oleae

PROVIDER: GSE82037 | GEO | 2017/05/12

SECONDARY ACCESSION(S): PRJNA323728

REPOSITORIES: GEO

ACCESS DATA

Similar Datasets

Project description:Some studies have shown that acute intake of high-phenol virgin olive oil reduces pro-inflammatory, pro-oxidant and pro-thrombotic states, but nowadays still remains unclear if those effects attributed to its phenolic fraction could be exerted at transcriptional level in vivo. Two virgin olive oil-based breakfasts with high (398 ppm) and low (70 ppm) content of phenolic compounds were administered to twenty patients (9 men and 11 women) with metabolic syndrome following a double-blinded random crossover design. Prior to the first breakfast intervention, participants followed a 6-week washout period in which they were instructed to not take vitamins, soy supplements, or any drug. To eliminate the potential effect that might exist in their usual dietary habits, all subjects followed a low-fat, carbohydrate rich (CHO) diet during this period and untill the end of the study. In the 24 h before each breakfast intervention, participants were instructed to avoid consuming phenol-rich foods such as fruit or juices, wine, grape juice, chocolate, coffee, tea, olive oil, or soya, and to refrain from intense physical exercise during that period. After a 12 h fasting and following a randomized sequential crossover design with one-week washout period, participants reported to the hospital and received two fat meals consisting of 60 g of white bread, 40 mL of VOO (CANOLIVA®, Antonio Cano e Hijos™, Córdoba, Spain) with high (398 ppm) or low (70 ppm) content in phenolic compounds, and 60,000 IU of vitamin A per m2 of body surface. Olive oil with low content in phenolic compounds was obtained as a result of extraction by physical procedures of most of the phenolic compounds in the high-phenol olive oil, so that both oils kept a similar composition of the remaining macro- and micronutrients. Throughout the 4-h duration of the study, the subjects performed no physical activity, nor did they consume anything but water. Gene expression was performed on peripheral blood mononuclear cells (PBMCs) at postprandial period (4 hours after breakfast) by microarray analysis and verified by qRT-PCR. Two sets of dye-swaped experiments were performed making a total of four technical replicates per subject. Each of the hybridizations compared total RNA from PBMCs obtained 4h after the intake of virgin olive oil with high phenolic content vs. total RNA from PBMCs obtained 4h after low-phenol virgin olive oil consumption.

Project description:The conservation of plant genetic resources (PGRs) is contingent on their current or potential use, so extending the knowledge about them is crucial for their valorization. The valorization and conservation of wild fruit PGRs are critical to ensure the maintenance of genetic and cultural heritage and to promote and develop of new perspectives on resource use. New strategies for characterizing PGRs are needed, and the omics approach can provide profound information that is still largely unknown. The strawberry tree (Arbutus unedo L.) is an underutilized, drought and fire-resistant species distributed in the Mediterranean area and its berries have large ethnobotanical use but were not usually consumed as fresh fruits. Although their phenolic profile and antioxidant capacity are known, they are not well characterised, particularly from a proteomic perspective. The aim of this work is the characterisation from a molecular viewpoint of two ecotypes of A. unedo (Campania and Sicily) to valorise a less known wild fruit PGR to encourage its preservation. Samples were collected from two different geographical areas to assess whether different geographical conditions could influence the characteristics of leaves and fruits at the three stages of ripening (green, veraison, red). Proteomic analysis identified 904 proteins, of which 122 showed significance along the ripening process. Some of these differentially abundant proteins, such as chalcone synthase, show a marked increase during ripening. From a proteomic perspective, there are no differences between the fruits from the two regions compared by the ripening stage. However, the pedoclimatic metabolic imprinting allowed the observation of good diversity in the metabolomic profiles between the two ecotypes, especially for anthocyanins and catechins, generally more abundant in Sicilian fruit, or the phenolic compounds more abundant in Campania fruit. Multi-omic characterisation enhanced the knowledge on a wild fruit plant species which shows specific adaptations and responses to the environment to be considered when addressing the issue of local agrobiodiversity.

Dataset Information

Transcriptional profiling of the pest Bactrocera oleae feeding on phenolic rich green olives

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure