title: A field experiment with elevated atmospheric CO2-mediated changes to C4 crop-herbivore interactions.
abstract: The effects of elevated CO2 (E-CO2) on maize and Asian corn borer (ACB), Ostrinia furnacalis, in open-top chambers were studied. The plants were infested with ACB and exposed to ambient and elevated (550 and 750 μl/l) CO2. E-CO2 increased the plant height and kernel number per ear. The plants had lower nitrogen contents and higher TNC: N ratios under E-CO2 than at ambient CO2. The response of plant height to E-CO2 was significantly dampened in plants with ACB infestation. However, the weight gain of the survivors declined in plants grown under E-CO2. Moreover, the plant damage caused by ACB was not different among the treatments. Overwintering larvae developed under E-CO2 had a lower supercooling point than those developed under ambient CO2. The results indicated that there was a positive effect of E-CO2 on the accumulation of maize biomass, i.e., the "air-fertilizer" effect, which led to a nutritional deficiency in the plants. The fitness-related parameters of ACB were adversely affected by the CO2-mediated decreased in plant nutritional quality, and ACB might alter its food consumption to compensate for these changes. Larval damage to maize under E-CO2 appears to be offset by this "air-fertilizer" effect, with reductions in larval fitness.
authors.affiliation: The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China.|College of Life Science and Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066000, P. R. China.
authors.forename: Haicui
authors.initials: H
authors.lastname: Xie
authors.affiliation: The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China.
authors.forename: Kaiqiang
authors.initials: K
authors.lastname: Liu
authors.affiliation: The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Sun
authors.affiliation: The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China.
authors.forename: Zhenying
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, P. R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Lu
authors.affiliation: The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China.
authors.forename: Kanglai
authors.initials: K
authors.lastname: He
mesh_terms: D000818:Animals; D001272:Atmosphere; D002245:Carbon Dioxide; D018556:Crops, Agricultural; D060434:Herbivory; D009036:Moths; D010788:Photosynthesis; D003313:Zea mays / Q000737:chemistry / Q000469:parasitology / Q000502:physiology
chemical_list: D002245:Carbon Dioxide