Does variation in host plant association and symbiont infection of pea aphid populations induce genetic and behaviour differentiation of its main parasitoid, Aphidius ervi?

Bilodeau, Emilie; Simon, Jean‐Christophe; Guay, Jean-Frédéric; Turgeon, Jean; Cloutier, Conrad

doi:10.1007/s10682-012-9577-z

Cited by 31 publications

(25 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The importance of species and genotype identity on trophic interactions has been demonstrated between insects and plants (Oliver, Moran & Hunter ; Bilodeau et al . ; Cayetano & Vorburger ; Hackett, Karley & Bennett ) and AM fungi and their host plants (Vandenkoornhuyse et al . ; Gange, Brown & Aplin ; Bennett, Alers‐Garcia & Bever ; Jansa, Smith & Smith ; Hempel et al .…”

Section: Discussionmentioning

confidence: 99%

“…; Bilodeau et al . ), all of which might have been affected by differences in plant nutritional quality for M. euphorbiae (Karley, Douglas & Parker ). Further work would be needed to identify precisely the causal factor(s) underlying the effect of AM fungal presence and Solanum type on increased aphid susceptibility to parasitism, and whether it was associated with larger aphid size, enhanced nutritional quality or compromised aphid physiological resistance.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Plant and insect microbial symbionts alter the outcome of plant–herbivore–parasitoid interactions: implications for invaded, agricultural and natural systems

et al. 2016

View full text Add to dashboard Cite

Summary Understanding how soil microbial communities influence plant interactions with other organisms, and how this varies with characteristics of the interacting organisms, is important for multiple systems. Solanum spp. are a suitable model for trophic interactions in studies of agricultural and natural systems and can also provide useful corollaries in invaded systems. This study examined the influence of soil mutualist arbuscular mycorrhizal (AM) fungi on growth of different Solanum types fed on by the potato aphid, Macrosiphum euphorbiae, in relation to the presence of the aphid facultative endosymbiont Hamiltonella defensa. Four Solanum types comprising two wild species, S. berthaultii and S. polyadenum, and two accessions of S. tuberosum, were grown with or without AM fungi and infested with one of four clonal lines of a single M. euphorbiae genotype (two with and two without H. defensa). Two experiments were conducted to (i) characterize plant responses to AM fungi and aphids and (ii) assess whether soil AM fungi could influence the success of the parasitoid wasp Aphidius ervi when attacking aphids reared on each Solanum type. In both experiments, similar patterns of plant biomass were observed in relation to AM fungal and aphid treatments. Solanum biomass depended on plant type and aphid infection with H. defensa. Plants exposed to aphids harbouring H. defensa had smaller root biomass, and therefore total plant biomass, compared to plants infested with H. defensa‐free aphids. M. euphorbiae performance varied with aphid clonal line, Solanum type and the presence of AM fungi. Parasitoid success, measured as the proportion of aphids from which a wasp emerged, was highest from aphids that had fed on plants colonized by AM fungi, although this result also varied with Solanum type and aphid clonal line. Synthesis. The presence of soil AM fungi, combined with within‐species plant and insect variation in key traits, can have subtle – but significant – effects on plant fitness and insect success. This study highlights the importance of exploring genotypic variation in plant and pest responses to soil microbiota to identify suitable biocontrol options.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Plant and insect microbial symbionts alter the outcome of plant–herbivore–parasitoid interactions: implications for invaded, agricultural and natural systems

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In addition to generating new data for the aforementioned collections (totalling 1932 surveyed aphids), we used data from prior publications on collections from nearby regions to enhance our sample sizes in our targeted locales (Pennsylvania, California and Utah) (Leonardo & Muiru, ; Oliver et al., ; Russell et al., ); we also added data from a new locale, southern Quebec (Bilodeau, Simon, Guay, Turgeon, & Cloutier, ). Aphids from New York and Pennsylvania had typically been collected across multiple times in each of the surveyed years.…”

Section: Methodsmentioning

confidence: 99%

Breakdown of a defensive symbiosis, but not endogenous defences, at elevated temperatures

et al. 2017

View full text Add to dashboard Cite

Environmental factors, including temperature, can have large effects on species interactions, including mutualisms and antagonisms. Most insect species are infected with heritable bacterial symbionts with many protecting their hosts from natural enemies. However, many symbionts or their products are thermally sensitive; hence, their effectiveness may vary across a range of temperatures. In the pea aphid, Acyrthosiphon pisum, the bacterial symbiont Hamiltonella defensa and its associated APSE bacteriophages confer resistance to this aphid's dominant parasitoid, Aphidius ervi. Here, we investigate the effects of temperature on both endogenous and symbiont-based protection against this parasitoid. We also explored the defensive properties of the X-type symbiont, a bacterium hypothesized to shape aphid defence when co-occurring with H. defensa. We show that H. defensa protection fails at higher temperatures, although some aphid genotype and H. defensa strain combinations are more robust than others at moderately warmer temperatures. We also found that a single X-type strain neither defended against parasitism by A. ervi nor rescued lost H. defensa protection at higher temperatures. In contrast, endogenous aphid resistance was effective across temperatures, revealing that these distinct defensive modes are not equally robust to changing environments. Through a survey of field-collected pea aphids, we found a negative correlation between H. defensa frequencies and average daily temperatures across North American locales, fitting expectations for reduced symbiont benefits under warm climates. Based on these findings, we propose that rising global temperatures could promote the widespread breakdown of defensive mutualisms, a prospect with implications for both human and ecosystem health.

show abstract

“…Our results are concordant with Bilodeau et al. (2013), which found a lack of host-associated parasitoid populations in introduced populations of A. ervi associated with two specialized host races of the pea aphid A. pisum (alfalfa and red clover host races) in a smaller scale study (between 160–240 km) in North America, using a different set of microsatellites. In addition, other several studies on aphid parasitoids have shown a lack of host-associated genetic differentiation (Lozier et al.…”

Section: Discussionmentioning

confidence: 99%

Does sex‐biased dispersal account for the lack of geographic and host‐associated differentiation in introduced populations of an aphid parasitoid?

Zepeda-Paulo

Lavandero

Maheo

et al. 2015

Ecology and Evolution

View full text Add to dashboard Cite

Host recognition and use in female parasitoids strongly relies on host fidelity, a plastic behavior which can significantly restrict the host preferences of parasitoids, thus reducing the gene flow between parasitoid populations attacking different insect hosts. However, the effect of migrant males on the genetic differentiation of populations has been frequently ignored in parasitoids, despite its known impact on gene flow between populations. Hence, we studied the extent of gene flow mediated by female and male parasitoids by assessing sibship relationships among parasitoids within and between populations, and its impact on geographic and host-associated differentiation in the aphid parasitoid Aphidius ervi. We report evidences of a high gene flow among parasitoid populations on different aphid hosts and geographic locations. The high gene flow among parasitoid populations was found to be largely male mediated, suggested by significant differences in the distribution of full-sib and paternal half-sib dyads of parasitoid populations.

show abstract

Does variation in host plant association and symbiont infection of pea aphid populations induce genetic and behaviour differentiation of its main parasitoid, Aphidius ervi?

Cited by 31 publications

References 98 publications

Plant and insect microbial symbionts alter the outcome of plant–herbivore–parasitoid interactions: implications for invaded, agricultural and natural systems

Plant and insect microbial symbionts alter the outcome of plant–herbivore–parasitoid interactions: implications for invaded, agricultural and natural systems

Breakdown of a defensive symbiosis, but not endogenous defences, at elevated temperatures

Does sex‐biased dispersal account for the lack of geographic and host‐associated differentiation in introduced populations of an aphid parasitoid?

Contact Info

Product

Resources

About