title: Reduced plant nutrition under elevated CO₂ depresses the immunocompetence of cotton bollworm against its endoparasite.
abstract: Estimating the immunocompetence of herbivore insects under elevated CO2 is an important step in understanding the effects of elevated CO2 on crop-herbivore-natural enemy interactions. Current study determined the effect of elevated CO2 on the immune response of Helicoverpa armigera against its parasitoid Microplitis mediator. H. armigera were reared in growth chambers with ambient or elevated CO2, and fed wheat grown in the concentration of CO2 corresponding to their treatment levels. Our results showed that elevated CO2 decreases the nutritional quality of wheat, and reduces the total hemocyte counts and impairs the capacity of hemocyte spreading of hemolymph of cotton bollworm larvae, fed wheat grown in the elevated CO2, against its parasitoid; however, this effect was insufficient to change the development and parasitism traits of M. mediator. Our results suggested that lower plant nutritional quality under elevated CO2 could decrease the immune response of herbivorous insects against their parasitoid natural enemies.
authors.affiliation: State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China.
authors.forename: Jin
authors.initials: J
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Sun
authors.affiliation: 1] State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China [2] Research Network of Global Change Biology, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Ge
mesh_terms: D000818:Animals; D002245:Carbon Dioxide; D003368:Gossypium / Q000502:physiology*; D006434:Hemocytes; D006458:Hemolymph / Q000378:metabolism; D060434:Herbivory; D054884:Host-Pathogen Interactions / Q000276:immunology; D007313:Insecta; D009036:Moths / Q000469:parasitology* / Q000502:physiology*; D018515:Plant Leaves
chemical_list: D002245:Carbon Dioxide