Positive Linkage in Bacterial Microbiota at the Plant-Insect Interface Benefits an Invasive Bark Beetle
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View abstract on PubMed
Summary
This summary is machine-generated.Symbiotic microbes, Novosphingobium and Erwinia/Serratia, are crucial for invasive red turpentine beetle (RTB) adaptation to new host pines. Their linked functions in biodegrading detrimental compounds and producing nutrients enhance RTB larval growth and invasion success.
Area Of Science
- Microbial Ecology
- Insect-Microbe Interactions
- Invasive Species Biology
Background
- Symbiotic microbes aid insect adaptation to new environments.
- Invasive red turpentine beetle (RTB) faces challenges with the novel host pine, Pinus tabuliformis, in China.
- Specific microbes, Novosphingobium and Erwinia/Serratia, in RTB galleries were previously found to degrade detrimental pine compounds.
Purpose Of The Study
- To investigate the importance of cross-linkages in symbiotic microbiota for insect invasiveness.
- To elucidate the functional interactions between Novosphingobium and Erwinia/Serratia in RTB larval adaptation.
- To understand how microbial metabolic networks contribute to nutrient production and insect growth.
Main Methods
- Analysis of microbial abundance and function in RTB galleries.
- Metabolomic profiling to identify microbial-derived nutrients.
- Investigation of bacterial utilization of host plant compounds (pinitol).
- Assessment of bacterial interactions and their impact on RTB larvae.
Main Results
- A significant positive linkage between Novosphingobium and Erwinia/Serratia functions was discovered, enhancing RTB larval growth.
- Erwinia/Serratia abundance increased with pinitol, a key phloem carbohydrate.
- Microbial metabolism of pinitol produced nutritive metabolites, supporting both bacteria and RTB larvae.
- Enriched functional proteins suggested a collective metabolic network regulating nutrient production.
Conclusions
- The positive interaction between Erwinia/Serratia and Novosphingobium is critical for RTB invasion success.
- This microbial symbiosis facilitates adaptation to unsuitable host plants by overcoming nutritional challenges.
- Bacilli bacteria may play a role in restricting these beneficial microbial interactions.
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