Insect-host control of obligate, intracellular symbiont density

Whittle Mathilda, Barreaux Antoine, Bonsall Michael B., Ponton Fleur, English Sinead. 2021. Insect-host control of obligate, intracellular symbiont density. Proceedings of the Royal Society B: Biological Sciences, 288 (1963):20211993, 9 p.

Quartile : Q1, Sujet : BIOLOGY / Quartile : Q1, Sujet : ECOLOGY / Quartile : Q1, Sujet : EVOLUTIONARY BIOLOGY

Liste HCERES des revues (en SHS) : oui

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

Résumé : Many insects rely on intracellular bacterial symbionts to supplement their specialized diets with micronutrients. Using data from diverse and well-studied insect systems, we propose three lines of evidence suggesting that hosts have tight control over the density of their obligate, intracellular bacterial partners. First, empirical studies have demonstrated that the within-host symbiont density varies depending on the nutritional and developmental requirements of the host. Second, symbiont genomes are highly reduced and have limited capacity for self-replication or transcriptional regulation. Third, several mechanisms exist for hosts to tolerate, regulate and remove symbionts including physical compartmentalization and autophagy. We then consider whether such regulation is adaptive, by discussing the relationship between symbiont density and host fitness. We discuss current limitations of empirical studies for exploring fitness effects in host–symbiont relationships, and emphasize the potential for using mathematical models to formalize evolutionary hypotheses and to generate testable predictions for future work.

Mots-clés Agrovoc : lutte anti-insecte, symbiote, modèle mathématique, hôte, symbiose, comportement animal, Diaphorina citri, interactions biologiques

Mots-clés libres : Symbiont density, Regulation, Host control, Cost-benefit, Wigglesworthia, Buchnera

Classification Agris : L72 - Organismes nuisibles des animaux

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

Auteurs et affiliations

• Whittle Mathilda, University of Bristol (GBR) - auteur correspondant
• Barreaux Antoine, University of Bristol (GBR) ORCID: 0000-0001-5822-761X
• Bonsall Michael B., University of Oxford (GBR)
• Ponton Fleur, University of Sydney (AUS)
• English Sinead, University of Bristol (GBR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/609729/)

Métriques

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