Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores

Specialist and generalist insect herbivore species often differ in how they respond to host plant traits, particularly defensive traits, and these responses can include weakened or strengthened immune responses to pathogens and parasites. Accurate methods to measure immune response in the presence a...

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Main Author: Evan Lampert
Format: Article
Language:English
Published: MDPI AG 2012-06-01
Series:Insects
Subjects:
Online Access:http://www.mdpi.com/2075-4450/3/2/573
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author Evan Lampert
author_facet Evan Lampert
author_sort Evan Lampert
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description Specialist and generalist insect herbivore species often differ in how they respond to host plant traits, particularly defensive traits, and these responses can include weakened or strengthened immune responses to pathogens and parasites. Accurate methods to measure immune response in the presence and absence of pathogens and parasites are necessary to determine whether susceptibility to these natural enemies is reduced or increased by host plant traits. Plant chemical traits are particularly important in that host plant metabolites may function as antioxidants beneficial to the immune response, or interfere with the immune response of both specialist and generalist herbivores. Specialist herbivores that are adapted to process and sometimes accumulate specific plant compounds may experience high metabolic demands that may decrease immune response, whereas the metabolic demands of generalist species differ due to more broad-substrate enzyme systems. However, the direct deleterious effects of plant compounds on generalist herbivores may weaken their immune responses. Further research in this area is important given that the ecological relevance of plant traits to herbivore immune responses is equally important in natural systems and agroecosystems, due to potential incompatibility of some host plant species and cultivars with biological control agents of herbivorous pests.
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spelling doaj.art-e616d61c7c604e33ae7862c3be283cd92022-12-21T23:52:03ZengMDPI AGInsects2075-44502012-06-013257359210.3390/insects3020573Influences of Plant Traits on Immune Responses of Specialist and Generalist HerbivoresEvan LampertSpecialist and generalist insect herbivore species often differ in how they respond to host plant traits, particularly defensive traits, and these responses can include weakened or strengthened immune responses to pathogens and parasites. Accurate methods to measure immune response in the presence and absence of pathogens and parasites are necessary to determine whether susceptibility to these natural enemies is reduced or increased by host plant traits. Plant chemical traits are particularly important in that host plant metabolites may function as antioxidants beneficial to the immune response, or interfere with the immune response of both specialist and generalist herbivores. Specialist herbivores that are adapted to process and sometimes accumulate specific plant compounds may experience high metabolic demands that may decrease immune response, whereas the metabolic demands of generalist species differ due to more broad-substrate enzyme systems. However, the direct deleterious effects of plant compounds on generalist herbivores may weaken their immune responses. Further research in this area is important given that the ecological relevance of plant traits to herbivore immune responses is equally important in natural systems and agroecosystems, due to potential incompatibility of some host plant species and cultivars with biological control agents of herbivorous pests.http://www.mdpi.com/2075-4450/3/2/573antioxidantecological immunityencapsulationLepidopterasecondary compoundssequestrationtradeoff
spellingShingle Evan Lampert
Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
Insects
antioxidant
ecological immunity
encapsulation
Lepidoptera
secondary compounds
sequestration
tradeoff
title Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
title_full Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
title_fullStr Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
title_full_unstemmed Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
title_short Influences of Plant Traits on Immune Responses of Specialist and Generalist Herbivores
title_sort influences of plant traits on immune responses of specialist and generalist herbivores
topic antioxidant
ecological immunity
encapsulation
Lepidoptera
secondary compounds
sequestration
tradeoff
url http://www.mdpi.com/2075-4450/3/2/573
work_keys_str_mv AT evanlampert influencesofplanttraitsonimmuneresponsesofspecialistandgeneralistherbivores