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Your Position :Home->Past Journals Catalog->2016年53 No.1

Feeding behavior of the peach aphid under elevated CO2 levels
Author of the article:PENG Xin-Hong1,2** LIU Zhi-Yuan2 GUO Hui-Juan2 JIANG Jun-Xi1*** SUN Yu-Cheng2***
Author's Workplace:1. College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China; 2. State Key Laboratory of IntegratedManagement of Insect Pest and Rodents, Institule of Zoology, Chinese Academy of Sciences, Beijing 100101, China
Key Words:elevated CO2, Arabidopsis, Myzus persicae, feeding behavior, jasmonic acid, salicylic acid, ethylene
Abstract:

[Objectives]  The global atmospheric concentration of carbon dioxide (CO2) has been increasing quickly, resulting in outbreaks of insect pests that have caught the world's attentionStudies of the feeding behavior of the peach aphid, Myzus persicae, on Arabidopsis under elevated atmospheric COlevels are, therefore, timely. [Methods]  Electrical penetration graph (EPG) technology was used to examine the feeding behavior of peach aphids on the wild type and three mutant varieties (jar1npr1ein2-5of Arabidopsis thaliana, with a particular focus on the role of jasmonic acid, salicylic acid and ethylene signaling pathways under elevated CO2 levels. [Results]  Elevated CO2 delayed the first appearance of C, E1 and E2 aphids on Col-0 and jar1 plants, but advanced the first appearance of C, E1 and E2 aphids on npr1 and ein2-5 plants. Furthermore, elevated CO2 decreased the duration of C aphid infestation, and increased the duration of E2 aphid infestation on jar1 plants, but did not affect these parameters on the other varieties. In addition, elevated CO2 increased the total frequency of C and pd aphids on Col-0 but not on the other varieties. [Conclusion]  Changes in aphid feeding behavior under elevated CO2 conditions suggest that elevated CO2 decreased the resistance of the Col-0 and jar1 varieties to aphids, but increased the resistance of npr1 and ein2-5 plants. These results indicate that elevated CO2 can modify aphid feeding behavior by altering plant’s defensive phytohormone mediated resistance.

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