From monocots to dicots: host shifts in Afrotropical derelomine weevils shed light on the evolution of non-obligatory brood pollination mutualism

Haran Julien, Proches Serban, Benoit Laure, Kergoat Gael J.. 2022. From monocots to dicots: host shifts in Afrotropical derelomine weevils shed light on the evolution of non-obligatory brood pollination mutualism. Biological Journal of the Linnean Society, 137 (1) : 15-29.

Url - jeu de données - Entrepôt autre : https://doi.org/10.6084/m9.figshare.19727212

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Weevils from the tribe Derelomini (Curculionidae: Curculioninae) are specialized brood pollinators engaged in mutualistic relationships with several angiosperm lineages. In brood pollination systems, reproductive plant tissues are used for the development of insect larval stages, whereas adult insects pollinate their plant hosts as a reward. The evolutionary history of derelomines in relationship to their hosts is poorly understood and potentially contrasts with other brood pollination systems, wherein a pollinator lineage is usually associated with a single host plant family. In the case of Afrotropical Derelomini, host records indicate a diverse host repertoire consisting of several families of monocot and dicot plants. In this study, we investigate their phylogenetic relationships, timing of diversification and evolution of host use. Our results suggest that derelomine lineages started their diversification ~40 Mya. Reconstructions of host use evolution support an ancestral association with the monocotyledonous palm family (Arecaceae), followed by several shifts towards other plant families in Afrotropical lineages, especially to dicotyledonous plants from the family Ebenaceae (on the genus Euclea L.). Some level of phylogenetic conservatism of host use is recovered for the lineages associated with either palms or Euclea. Multiple instances of sympatric weevil assemblages on the same plant are also unravelled, corresponding to either single or independent colonization events. Overall, the diversity of hosts colonized and the frequency of sympatric assemblages highlighted in non-obligatory plant–derelomine brood pollination systems contrast with what is generally expected from plant–insect brood pollination systems.

Mots-clés Agrovoc : Curculionidae, relation plante animal, relation hôte pathogène, pollinisateur, phylogénie, Ebenaceae

Mots-clés géographiques Agrovoc : Afrique du Sud

Mots-clés complémentaires : Derelomini

Mots-clés libres : Brood pollinator, Host use evolution, Mutualist interactions, Phylogenetics, Plant–insect interactions

Classification Agris : L60 - Taxonomie et géographie animales
H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement hors UE : Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, PalmElit

Auteurs et affiliations

• Haran Julien, CIRAD-BIOS-UMR CBGP (FRA) - auteur correspondant
• Proches Serban, University of KwaZulu-Natal (ZAF)
• Benoit Laure, CIRAD-BIOS-UMR CBGP (FRA)
• Kergoat Gael J., INRAE (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/603719/)

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