Microbiota-mediated competition between Drosophila species
2023
Rombaut, Antoine | Gallet, Romain | Qitout, Kenza | Samy, Mukherjy | Guilhot, Robin | Ghirardini, Pauline | Lazzaro, Brian, P. | Becher, Paul, G. | Xuéreb, Anne | Gibert, Patricia | Fellous, Simon | Centre de Biologie pour la Gestion des Populations (UMR CBGP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | Cornell University [New York] | Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) | Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS) | This work received financial support from: French ANR’s projects “Investissements d’avenir” Labex Agro (ANR-10-LABX-0001); CIVC; BIVB; ANR SWING (ANR-16-CE02-0015); INRAE’s section “Santé des Plantes et Environnement”; Eranet LEAP Agri project Pest Free Fruit (ANR-18-LEAP-0006). | ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010) | ANR-16-CE02-0015,SWING,Invasion mondiale de la drosophile à aile tachetée: Génétique, plasticité et potentiel évolutif(2016) | ANR-18-LEAP-0006,Pest free fruit,Sustainable intensification of fruit production systems through innovative pest biological control technologies(2018)
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Mostrar más [+] Menos [-]Inglés. Background: The influence of microbiota in ecological interactions, and in particular competition, is poorly known. We studied competition between two insect species, the invasive pest Drosophila suzukii and the model Drosophila melanogaster, whose larval ecological niches overlap in ripe, but not rotten, fruit.Results: We discovered D. suzukii females prevent costly interspecific larval competition by avoiding oviposition on substrates previously visited by D. melanogaster. More precisely, D. melanogaster association with gut bacteria of the genus Lactobacillus triggered D. suzukii avoidance. However, D. suzukii avoidance behavior is condition-dependent, and D. suzukii females that themselves carry D. melanogaster bacteria stop avoiding sites visited by D. melanogaster. The adaptive significance of avoiding cues from the competitor’s microbiota was revealed by experimentally reproducing in-fruit larval competition: reduced survival of D. suzukii larvae only occurred if the competitor had its normal microbiota.Conclusions: This study establishes microbiotas as potent mediators of interspecific competition and reveals a central role for context-dependent behaviors under bacterial influence.
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