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- Title
Increased density of endosymbiotic Buchnera related to pesticide resistance in yellow morph of melon aphid.
- Authors
Guo, Shao-Kun; Gong, Ya-Jun; Chen, Jin-Cui; Shi, Pan; Cao, Li-Jun; Yang, Qiong; Hoffmann, Ary Anthony; Wei, Shu-Jun
- Abstract
Many invertebrates develop into different color morphs in response to changes in environmental conditions. Color morphs can differ in their biology and stress tolerance including pesticide resistance, but underlying mechanisms are unclear. In this study, we found that yellow morphs (predominant in hot summer conditions) of an agricultural pest, the melon aphid Aphis gossypii, have higher levels of resistance to the commonly used pesticides imidacloprid and sulfoxaflor compared to the green morphs (predominant in cooler spring and autumn conditions), while no difference was found in morph resistance to the antibiotic/pesticide avermectin. Transcriptome analysis and biochemical assays of enzyme activities revealed no differences in metabolic processes between the two color morphs except for differentially expressed genes related to wing development. Microbiome analysis revealed that the endosymbiont Buchnera aphidicola is the dominant bacterium in both morphs, representing 86.76–99.88% of the microbiome. The yellow morph had a higher density of Buchnera compared to the green morph. When yellow morphs were treated with avermectin and antibiotics, the density of Buchnera was reduced to levels similar to the green morph, and their susceptibility to imidacloprid was simultaneously increased. These results indicate an association between resistance in the yellow morph of A. gossypii and symbiotic bacteria, providing novel insights into pesticide resistance mechanisms and the plasticity of stress adaptation.
- Subjects
PESTICIDE resistance; IMIDACLOPRID; COTTON aphid; DRUG resistance in bacteria; AGRICULTURAL pests; DENSITY
- Publication
Journal of Pest Science, 2020, Vol 93, Issue 4, p1281
- ISSN
1612-4758
- Publication type
Article
- DOI
10.1007/s10340-020-01248-0