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For a more up-to-date version, please consult the site in French version
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DGIMI - Diversity, Genomes and Insects-Microorganisms Interactions

DGIMI is a joint research unit supervised by INRAE and the University of Montpellier. It is located on the Triolet campus of the University of Montpellier, and houses staff from both INRAE and UM.

The research carried out by UMR DGIMI is devoted to the study of interaction mechanisms between insect crop pests, their pathogens and parasites, and their host plants. This research takes into account the diversity of the partners and is based on knowledge of their genomes.

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HAL : Dernières publications

  • [hal-05155756] Characterization of the genomic sequence of an iflavirus, a protoambidensovirus, and of three microviruses detected in mosquitoes (Aedes albopictus and Culex quinquefasciatus)

    We report the complete CDS of five viruses: XiangYun picorna-like virus 4 ( Iflaviridae ), Protoambidensovirus dipteran1 ( Parvoviridae ), and three microviruses ( Microviridae ), detected by viromics surveillance of Aedes albopictus and Culex quinquefasciatus from Réunion Island. The protoambidensovirus detected in A. albopictus belongs to a clade previously reported only in Culex pipiens.

    ano.nymous@ccsd.cnrs.fr.invalid (Sarah François) 10 Jul 2025

    https://hal.inrae.fr/hal-05155756v1
  • [hal-05162736] Will anomalies in the field of EPN associated-bacteria lead to a new paradigm?

    <div><p>According to the prevailing monoxenic paradigm, entomopathogenic nematodes (EPNs) form specific association with endosymbiotic bacteria. However, many anomalies have been observed over the last 60 years, with bacterial taxa other than the known endosymbiont isolated in culture-based approaches or detected by nextgeneration sequencing. We have reconsidered the role of this EPN-associated microbiotaknown as the second bacterial circlein the life-cycle of EPNs. In this review, we present arguments supporting a role for certain taxa in the death of the insect and propose hypotheses concerning other properties of the bacteria involved in their interactions with EPNs. Should these functional hypotheses be confirmed, then the bacterial "anomalies" would no longer be regarded as such. Instead, they would form the basis for the establishment of a new paradigm, the polyxenic paradigm.</p><p>☆ This article is part of a special issue entitled: 'EPN 100 years' published in Journal of Invertebrate Pathology.</p></div>

    ano.nymous@ccsd.cnrs.fr.invalid (Jean-Claude Ogier) 15 Jul 2025

    https://hal.inrae.fr/hal-05162736v1
  • [hal-05154488] Is antibiotic (mis)use an emerging ecological threat to wild insects?

    Antibiotic discovery revolutionized human healthcare and boosted agricultural productivity. The efficacy of this revolution is now being challenged however, as the release of antibiotic residues into soils and waterways promotes the evolution and spread of antibiotic resistance genes. There are signs that this antibiotic pollution also has ecological costs, including reduced insect health. Here, we assess this risk. We discuss where, when and how wild insects are exposed to antibiotics, the consequences of this exposure and crucially, if the concentrations that wild insects encounter are sufficiently high to trigger phenotypic responses. Data demonstrate that antibiotic residues reach concentrations in the field that can have phenotypic impacts in insects. These impacts include reduced health and foraging activity in pollinators, and improved survival in insect vectors of disease, demonstrating potential consequences for food-security and disease transmission. More generally, antibiotics can reduce insect stress resistance meaning that antibiotic pollution could elevate insect susceptibility to other stressors implicated in insect declines. We highlight gaps in our understanding of how antibiotic pollution affects wild insects and the ecosystem services they provide. These gaps urgently need to be filled, because global antibiotic use is rising. Crucially, we must determine how antibiotic residues in the field degrade or accumulate along food chains, and how field-realistic concentrations affect insects directly and via interactions with other environmental stressors. This will offer concrete insights into the consequences of rising antibiotic use for insects, and their broader societal and ecological impacts.

    ano.nymous@ccsd.cnrs.fr.invalid (C. Ruth Archer) 09 Jul 2025

    https://hal.inrae.fr/hal-05154488v1

News

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18 July 2025

By: A-N. Volkoff, N. Nègre , I. Seninet

A University of Montpellier's Associated Professor in microbiology position (sections 64-65) has been created in DGIMI

Applications must be submitted on Odyssée before 04/04/2025.
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A new scientific publication

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Invasive populations in Senegal show evidence of adaptive evolution on CYP450 genes that may explain their adaptation to maize

photo Peter Heeling

Website under restructuring

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Our website is currently being restructured.

Postdoctoral Position in CRISPR/Cas9 Gene Editing in Insects (University of Montpellier)

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Location: UMR-DGIMI, University of Montpellier, France / Duration: 18 months / Start Date: Preferably from April 2025