文章基本信息

标题：A field experiment with elevated atmospheric CO₂-mediated changes to C₄ crop-herbivore interactions
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作者：Haicui Xie ; Kaiqiang Liu ; Dandan Sun 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep13923
出版社：Springer Nature
摘要：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.