協働と衝突は,クオラムセンシング細菌集団で起こる
Stephen P Diggle1, Ashleigh S Griffin, Genevieve S Campbell
1Institute of Infection, Immunity & Inflammation, Centre for Biomolecular Sciences, University Park, University of Nottingham, Nottingham NG7 2RD, UK. steve.diggle@nottingham.ac.uk
Nature
|November 16, 2007
まとめ
バクテリアのクオラムセンシング (QS) は,集団の行動を調整しますが,非協力的な個人によって悪用されることがあります. 親族選択は,細菌集団におけるこの搾取問題に対する解決策を提供します.
科学分野:
- 微生物学 微生物学とは
- 進化生物学の進化生物学について
- バクテリアのコミュニケーション
背景:
- 細菌細胞は,信号分子を含むプロセスであるクオラムセンシング (QS) を使用して通信します.
- QSは一般に,集団レベルで協力的行動を調整すると考えられています.
- 進化論は,協力が協力しない個体によって悪用される可能性があると示唆している.
研究 の 目的:
- Pseudomonas aeruginosaにおけるクオラムセンシング (QS) の社会的進化を実験的に調査する.
- QS主導の協力が非生産者または非協力者による搾取に敏感であるかどうかを判断する.
- QSシステムにおける利用の潜在的な進化的解決策を探求する.
主な方法:
- Pseudomonas aeruginosa.の実験的進化について
- QS信号生成と協同行動の分析.
- QSダイナミクスに対する親族選択の影響の評価.
主要な成果:
- 定数感知 (QS) は,グループレベルの利益をもたらしますが,搾取に脆弱です.
- QS コストを回避する搾取的なバクテリア変異体は,集団内で広がることができます.
- 相互作用する細胞が密接に関連している場合,親族選択は搾取を軽減することができます.
結論:
- 動物のコミュニケーションに共通する社会的搾取の問題は,細菌のクオラムセンシングでも発生します.
- バクテリアの社会的進化を理解するには,協力,搾取,関係性の相互作用を考慮する必要があります.
- 親族の選択は,細菌の共同体の協力関係を維持する重要な要因である可能性があります.
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