Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process

Parasitoid host selection behaviour has been extensively studied in experimentally simplified tritrophic systems formed by one single food chain (one plant, one herbivore and one parasitoid species). The "Mother knows best" hypothesis predicts that the preference for a plant-host complex s...

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Main Authors:	Chesnais, Quentin, Ameline, Arnaud, Doury, Géraldine, Le Roux, Vincent, Couty, Aude
Format:	Online
Language:	English
Published:	Public Library of Science 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4535949/

id	pubmed-4535949
recordtype	oai_dc
spelling	pubmed-45359492015-08-20 Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process Chesnais, Quentin Ameline, Arnaud Doury, Géraldine Le Roux, Vincent Couty, Aude Research Article Parasitoid host selection behaviour has been extensively studied in experimentally simplified tritrophic systems formed by one single food chain (one plant, one herbivore and one parasitoid species). The "Mother knows best" hypothesis predicts that the preference for a plant-host complex should be positively correlated with plant quality for offspring performance. We studied the host selection behaviour of the generalist endoparasitoid Aphidius matricariae towards the black bean aphid Aphis fabae in the intercrop system including Vicia faba as a focal plant and its companion plant Camelina sativa. Dual-choice laboratory bioassays revealed that parasitoid females preferred to orientate towards (1) the plant-aphid complex over the non-infested plant whatever the complex (2) the C. sativa-A. fabae complex over the V. faba-A. fabae complex. In dual choice attack rate bioassays, parasitoid females showed more interest towards the aphids on C. sativa but paradoxically chose to oviposit more in aphids on V. faba. Ultimately, parasitoids that had developed on the V. faba-A. fabae complex exhibited better fitness parameters. By demonstrating that parasitoid females were able to discriminate the aphid host that offered the highest fitness to their offspring but selected beforehand the least suitable plant-aphid complex, we provide key insight into the disruption in their host selection behaviour potentially triggered by diverse habitats. This suggests that the "Mother knows best" hypothesis could be thwarted by increasing the complexity of the studied systems. Public Library of Science 2015-08-13 /pmc/articles/PMC4535949/ /pubmed/26270046 http://dx.doi.org/10.1371/journal.pone.0135661 Text en © 2015 Chesnais et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Chesnais, Quentin Ameline, Arnaud Doury, Géraldine Le Roux, Vincent Couty, Aude
spellingShingle	Chesnais, Quentin Ameline, Arnaud Doury, Géraldine Le Roux, Vincent Couty, Aude Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
author_facet	Chesnais, Quentin Ameline, Arnaud Doury, Géraldine Le Roux, Vincent Couty, Aude
author_sort	Chesnais, Quentin
title	Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
title_short	Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
title_full	Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
title_fullStr	Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
title_full_unstemmed	Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process
title_sort	aphid parasitoid mothers don't always know best through the whole host selection process
description	Parasitoid host selection behaviour has been extensively studied in experimentally simplified tritrophic systems formed by one single food chain (one plant, one herbivore and one parasitoid species). The "Mother knows best" hypothesis predicts that the preference for a plant-host complex should be positively correlated with plant quality for offspring performance. We studied the host selection behaviour of the generalist endoparasitoid Aphidius matricariae towards the black bean aphid Aphis fabae in the intercrop system including Vicia faba as a focal plant and its companion plant Camelina sativa. Dual-choice laboratory bioassays revealed that parasitoid females preferred to orientate towards (1) the plant-aphid complex over the non-infested plant whatever the complex (2) the C. sativa-A. fabae complex over the V. faba-A. fabae complex. In dual choice attack rate bioassays, parasitoid females showed more interest towards the aphids on C. sativa but paradoxically chose to oviposit more in aphids on V. faba. Ultimately, parasitoids that had developed on the V. faba-A. fabae complex exhibited better fitness parameters. By demonstrating that parasitoid females were able to discriminate the aphid host that offered the highest fitness to their offspring but selected beforehand the least suitable plant-aphid complex, we provide key insight into the disruption in their host selection behaviour potentially triggered by diverse habitats. This suggests that the "Mother knows best" hypothesis could be thwarted by increasing the complexity of the studied systems.
publisher	Public Library of Science
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4535949/
_version_	1613259479482105856

Aphid Parasitoid Mothers Don't Always Know Best through the Whole Host Selection Process

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