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Spiroplasma affects host aphid proteomics feeding on two nutritional resources.
Aline Sartori Guidolin1, Thaís Regiani Cataldi2, Carlos Alberto Labate2
1Insect Interactions Laboratory, Department of Entomology and Acarology, ESALQ, University of São Paulo, Av. Pádua Dias 11, 13418-900, Piracicaba, São Paulo, Brazil.
Scientific Reports
|February 8, 2018
Summary
Spiroplasma infection alters aphid proteome, particularly heat shock and metabolic proteins. These changes are more pronounced when aphids feed on less nutritious host plants, impacting their overall physiology.
Area of Science:
- Insect microbiology
- Proteomics
- Symbiotic relationships
Background:
- Bacterial symbionts significantly influence insect bioecology and physiology.
- Aphids host various secondary symbionts, but Spiroplasma is rarely reported in them.
- A tropical aphid, Aphis citricidus, exhibits a high Spiroplasma infection rate in certain populations.
Purpose of the Study:
- To investigate the impact of Spiroplasma infection on the aphid proteome.
- To compare these effects across different host plant qualities (optimum vs. suboptimum).
Main Methods:
- Utilized sister isolines of Spiroplasma-infected (Ac-BS) and Spiroplasma-free (Ac-B) Aphis citricidus.
- Rearing experiments were conducted on sweet orange (optimum) and orange jasmine (suboptimum) host plants.
- Proteomic profiling was employed to analyze differential protein abundance.
Main Results:
- Host plant quality significantly impacted aphid proteome, with more protein changes observed on orange jasmine.
- Spiroplasma infection affected heat shock proteins, cell structure/function proteins, and energy metabolism proteins in both host plants.
- On the suboptimum host (orange jasmine), Spiroplasma further induced changes in proteins related to antimicrobial activity, carbohydrate metabolism, and amino acid metabolism.
Conclusions:
- Aphid proteome responses to Spiroplasma infection are modulated by host plant nutritional value.
- Spiroplasma infection imposes physiological stress, particularly evident under suboptimal host conditions.
- Understanding these symbiotic interactions is crucial for aphid management and pest control strategies.
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