UZH-Logo

Maintenance Infos

Extended larval development time for aphid parasitoids in the presence of plant endosymbionts


Härri, S A; Krauss, J; Müller, C B (2009). Extended larval development time for aphid parasitoids in the presence of plant endosymbionts. Ecological Entomology, 34(1):20-25.

Abstract

1. Variation in plant chemistry does not only mediate interactions between plants and herbivores but also those between herbivores and their natural enemies, and plants and natural enemies.
2. Endophytic fungi complete their whole life cycle within the host plant’s tissue and are associated with a large diversity of plant species. Endophytes of the genus
Neotyphodium alter the chemistry of the host plant by producing herbivore toxic alkaloids.
3. Here we asked whether the endophyte-tolerant aphid species Metopolophium festucae could be defended against its parasitoid Aphidius ervi when feeding on endophyte-infected plants. In a laboratory experiment, we compared life-history traits of A. ervi when exposed to hosts on endophyte-infected or endophyte-free Lolium perenne .
4. The presence of endophytes significantly increased larval and pupal development times, but did not affect the mortality of immature parasitoids or the longevity of the
adults. Although the number of parasitoid mummies tended to be reduced on endophyteinfected plants, the number of emerging parasitoids did not differ significantly between
the two treatments.
5. This shows that the metabolism of individual aphids feeding on infected plants may be changed and help in the defence against parasitoids. An increase in parasitoid
development time should ultimately reduce the population growth of A. ervi . Therefore, endophyte presence may represent an advantage for endophyte-tolerant aphid species
through extended parasitoid development and its effect on parasitoid population dynamics.

1. Variation in plant chemistry does not only mediate interactions between plants and herbivores but also those between herbivores and their natural enemies, and plants and natural enemies.
2. Endophytic fungi complete their whole life cycle within the host plant’s tissue and are associated with a large diversity of plant species. Endophytes of the genus
Neotyphodium alter the chemistry of the host plant by producing herbivore toxic alkaloids.
3. Here we asked whether the endophyte-tolerant aphid species Metopolophium festucae could be defended against its parasitoid Aphidius ervi when feeding on endophyte-infected plants. In a laboratory experiment, we compared life-history traits of A. ervi when exposed to hosts on endophyte-infected or endophyte-free Lolium perenne .
4. The presence of endophytes significantly increased larval and pupal development times, but did not affect the mortality of immature parasitoids or the longevity of the
adults. Although the number of parasitoid mummies tended to be reduced on endophyteinfected plants, the number of emerging parasitoids did not differ significantly between
the two treatments.
5. This shows that the metabolism of individual aphids feeding on infected plants may be changed and help in the defence against parasitoids. An increase in parasitoid
development time should ultimately reduce the population growth of A. ervi . Therefore, endophyte presence may represent an advantage for endophyte-tolerant aphid species
through extended parasitoid development and its effect on parasitoid population dynamics.

Citations

8 citations in Web of Science®
10 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

59 downloads since deposited on 19 Mar 2009
13 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:Aphidius ervi, development time, host-parasitoid interactions, larval mortality, life-history traits, longevity, Metopolophium festucae, multitrophic interactions, Neotyphodium lolii, sex ratio
Language:English
Date:2009
Deposited On:19 Mar 2009 12:15
Last Modified:05 Apr 2016 13:11
Publisher:Wiley-Blackwell
ISSN:0307-6946
Additional Information:The definitive version is available at www.blackwell-synergy.com
Publisher DOI:https://doi.org/10.1111/j.1365-2311.2008.01037.x
Permanent URL: https://doi.org/10.5167/uzh-17839

Download

[img]
Content: Published Version
Filetype: PDF - Registered users only
Size: 1MB
View at publisher
[img]
Preview
Content: Accepted Version
Filetype: PDF
Size: 1MB

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations