Insect-host control of obligate, intracellular symbiont density
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.
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Subjects: | L72 - Organismes nuisibles des animaux, lutte anti-insecte, symbiote, modèle mathématique, hôte, symbiose, comportement animal, Diaphorina citri, interactions biologiques, http://aims.fao.org/aos/agrovoc/c_3885, http://aims.fao.org/aos/agrovoc/c_7562, http://aims.fao.org/aos/agrovoc/c_24199, http://aims.fao.org/aos/agrovoc/c_3673, http://aims.fao.org/aos/agrovoc/c_7563, http://aims.fao.org/aos/agrovoc/c_8811, http://aims.fao.org/aos/agrovoc/c_27187, http://aims.fao.org/aos/agrovoc/c_49896, |
Online Access: | http://agritrop.cirad.fr/609729/ http://agritrop.cirad.fr/609729/1/whittle-et-al-2021-insect-host-control-of-obligate-intracellular-symbiont-density.pdf |
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dig-cirad-fr-6097292024-09-04T15:26:30Z http://agritrop.cirad.fr/609729/ http://agritrop.cirad.fr/609729/ Insect-host control of obligate, intracellular symbiont density. Whittle Mathilda, Barreaux Antoine, Bonsall Michael B., Ponton Fleur, English Sinead. 2021. Proceedings of the Royal Society B: Biological Sciences, 288 (1963):20211993, 9 p.https://doi.org/10.1098/rspb.2021.1993 <https://doi.org/10.1098/rspb.2021.1993> Insect-host control of obligate, intracellular symbiont density Whittle, Mathilda Barreaux, Antoine Bonsall, Michael B. Ponton, Fleur English, Sinead eng 2021 Proceedings of the Royal Society B: Biological Sciences L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 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. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/609729/1/whittle-et-al-2021-insect-host-control-of-obligate-intracellular-symbiont-density.pdf text cc_by info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ https://doi.org/10.1098/rspb.2021.1993 10.1098/rspb.2021.1993 info:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2021.1993 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1098/rspb.2021.1993 |
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L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 |
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L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 Whittle, Mathilda Barreaux, Antoine Bonsall, Michael B. Ponton, Fleur English, Sinead Insect-host control of obligate, intracellular symbiont density |
description |
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. |
format |
article |
topic_facet |
L72 - Organismes nuisibles des animaux lutte anti-insecte symbiote modèle mathématique hôte symbiose comportement animal Diaphorina citri interactions biologiques http://aims.fao.org/aos/agrovoc/c_3885 http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3673 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_8811 http://aims.fao.org/aos/agrovoc/c_27187 http://aims.fao.org/aos/agrovoc/c_49896 |
author |
Whittle, Mathilda Barreaux, Antoine Bonsall, Michael B. Ponton, Fleur English, Sinead |
author_facet |
Whittle, Mathilda Barreaux, Antoine Bonsall, Michael B. Ponton, Fleur English, Sinead |
author_sort |
Whittle, Mathilda |
title |
Insect-host control of obligate, intracellular symbiont density |
title_short |
Insect-host control of obligate, intracellular symbiont density |
title_full |
Insect-host control of obligate, intracellular symbiont density |
title_fullStr |
Insect-host control of obligate, intracellular symbiont density |
title_full_unstemmed |
Insect-host control of obligate, intracellular symbiont density |
title_sort |
insect-host control of obligate, intracellular symbiont density |
url |
http://agritrop.cirad.fr/609729/ http://agritrop.cirad.fr/609729/1/whittle-et-al-2021-insect-host-control-of-obligate-intracellular-symbiont-density.pdf |
work_keys_str_mv |
AT whittlemathilda insecthostcontrolofobligateintracellularsymbiontdensity AT barreauxantoine insecthostcontrolofobligateintracellularsymbiontdensity AT bonsallmichaelb insecthostcontrolofobligateintracellularsymbiontdensity AT pontonfleur insecthostcontrolofobligateintracellularsymbiontdensity AT englishsinead insecthostcontrolofobligateintracellularsymbiontdensity |
_version_ |
1813421981071048704 |