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Genetics-based interactions among plants, pathogens, and herbivores define arthropod community structure.

Identifieur interne : 001D46 ( Main/Exploration ); précédent : 001D45; suivant : 001D47

Genetics-based interactions among plants, pathogens, and herbivores define arthropod community structure.

Auteurs : Posy E. Busby ; Louis J. Lamit ; Arthur R. Keith ; George Newcombe ; Catherine A. Gehring ; Thomas G. Whitham ; Rodolfo Dirzo

Source :

Ecology [ 0012-9658 ] ; 2015.

RBID : pubmed:26378319

Descripteurs français

KwdFr :
- Animaux (MeSH), Arthropodes (génétique), Arthropodes (physiologie), Chaine alimentaire (MeSH), Champignons (génétique), Champignons (physiologie), Herbivorie (génétique), Herbivorie (physiologie), Maladies des plantes (microbiologie), Populus (génétique), Populus (physiologie), Variation génétique (MeSH).
MESH :
- génétique : Arthropodes, Champignons, Herbivorie, Populus.
- microbiologie : Maladies des plantes.
- physiologie : Arthropodes, Champignons, Herbivorie, Populus.
- Animaux, Chaine alimentaire, Variation génétique.

English descriptors

KwdEn :
- Animals (MeSH), Arthropods (genetics), Arthropods (physiology), Food Chain (MeSH), Fungi (genetics), Fungi (physiology), Genetic Variation (MeSH), Herbivory (genetics), Herbivory (physiology), Plant Diseases (microbiology), Populus (genetics), Populus (physiology).
MESH :
- genetics : Arthropods, Fungi, Herbivory, Populus.
- microbiology : Plant Diseases.
- physiology : Arthropods, Fungi, Herbivory, Populus.
- Animals, Food Chain, Genetic Variation.

Abstract

Plant resistance to pathogens or insect herbivores is common, but its potential for indirectly influencing plant-associated communities is poorly known. Here, we test whether pathogens' indirect effects on arthropod communities and herbivory depend on plant resistance to pathogens and/or herbivores, and address the overarching interacting foundation species hypothesis that genetics-based interactions among a few highly interactive species can structure a much larger community. In a manipulative field experiment using replicated genotypes of two Populus species and their interspecific hybrids, we found that genetic variation in plant resistance to both pathogens and insect herbivores modulated the strength of pathogens' indirect effects on arthropod communities and insect herbivory. First, due in part to the pathogens' differential impacts on leaf biomass among the two Populus species and the hybrids, the pathogen most strongly impacted arthropod community composition, richness, and abundance on the pathogen-susceptible tree species. Second, we found similar patterns comparing pathogen-susceptible and pathogen-resistant genotypes within species. Third, within a plant species, pathogens caused a fivefold greater reduction in herbivory on insect-herbivore-susceptible plant genotypes than on herbivore-resistant genotypes, demonstrating that the pathogen-herbivore interaction is genotype dependent. We conclude that interactions among plants, pathogens, and herbivores can structure multitrophic communities, supporting the interacting foundation species hypothesis. Because these interactions are genetically based, evolutionary changes in genetic resistance could result in ecological changes in associated communities, which may in turn feed back to affect plant fitness.

DOI: 10.1890/13-2031.1
PubMed: 26378319

Affiliations:

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<author><name sortKey="Newcombe, George" sort="Newcombe, George" uniqKey="Newcombe G" first="George" last="Newcombe">George Newcombe</name>
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<term>Champignons (physiologie)</term>
<term>Herbivorie (génétique)</term>
<term>Herbivorie (physiologie)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Populus (génétique)</term>
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<term>Variation génétique (MeSH)</term>
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<term>Populus</term>
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<front><div type="abstract" xml:lang="en">Plant resistance to pathogens or insect herbivores is common, but its potential for indirectly influencing plant-associated communities is poorly known. Here, we test whether pathogens' indirect effects on arthropod communities and herbivory depend on plant resistance to pathogens and/or herbivores, and address the overarching interacting foundation species hypothesis that genetics-based interactions among a few highly interactive species can structure a much larger community. In a manipulative field experiment using replicated genotypes of two Populus species and their interspecific hybrids, we found that genetic variation in plant resistance to both pathogens and insect herbivores modulated the strength of pathogens' indirect effects on arthropod communities and insect herbivory. First, due in part to the pathogens' differential impacts on leaf biomass among the two Populus species and the hybrids, the pathogen most strongly impacted arthropod community composition, richness, and abundance on the pathogen-susceptible tree species. Second, we found similar patterns comparing pathogen-susceptible and pathogen-resistant genotypes within species. Third, within a plant species, pathogens caused a fivefold greater reduction in herbivory on insect-herbivore-susceptible plant genotypes than on herbivore-resistant genotypes, demonstrating that the pathogen-herbivore interaction is genotype dependent. We conclude that interactions among plants, pathogens, and herbivores can structure multitrophic communities, supporting the interacting foundation species hypothesis. Because these interactions are genetically based, evolutionary changes in genetic resistance could result in ecological changes in associated communities, which may in turn feed back to affect plant fitness.</div>
</front>
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<Abstract><AbstractText>Plant resistance to pathogens or insect herbivores is common, but its potential for indirectly influencing plant-associated communities is poorly known. Here, we test whether pathogens' indirect effects on arthropod communities and herbivory depend on plant resistance to pathogens and/or herbivores, and address the overarching interacting foundation species hypothesis that genetics-based interactions among a few highly interactive species can structure a much larger community. In a manipulative field experiment using replicated genotypes of two Populus species and their interspecific hybrids, we found that genetic variation in plant resistance to both pathogens and insect herbivores modulated the strength of pathogens' indirect effects on arthropod communities and insect herbivory. First, due in part to the pathogens' differential impacts on leaf biomass among the two Populus species and the hybrids, the pathogen most strongly impacted arthropod community composition, richness, and abundance on the pathogen-susceptible tree species. Second, we found similar patterns comparing pathogen-susceptible and pathogen-resistant genotypes within species. Third, within a plant species, pathogens caused a fivefold greater reduction in herbivory on insect-herbivore-susceptible plant genotypes than on herbivore-resistant genotypes, demonstrating that the pathogen-herbivore interaction is genotype dependent. We conclude that interactions among plants, pathogens, and herbivores can structure multitrophic communities, supporting the interacting foundation species hypothesis. Because these interactions are genetically based, evolutionary changes in genetic resistance could result in ecological changes in associated communities, which may in turn feed back to affect plant fitness.</AbstractText>
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<name sortKey="Gehring, Catherine A" sort="Gehring, Catherine A" uniqKey="Gehring C" first="Catherine A" last="Gehring">Catherine A. Gehring</name>
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Genetics-based interactions among plants, pathogens, and herbivores define arthropod community structure.

Genetics-based interactions among plants, pathogens, and herbivores define arthropod community structure.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki