糸状バクテリアは電子をセンチメートルの距離まで運ぶ
Christian Pfeffer1, Steffen Larsen, Jie Song
1Center for Geomicrobiology, Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark.
Nature
|October 30, 2012
まとめ
海洋堆積物の微生物は,電流を利用してエネルギーを伝達する. 繊維状バクテリアは,生きている電気ケーブルとして作用し,深海の環境で酸素消費と硫化物の酸化を媒介する.
科学分野:
- ゲオミクロバイオロジー
- 環境科学 環境科学
- バイオテクノロジー バイオテクノロジー
背景:
- 海洋沈殿物は,生地化学のサイクルを駆動する微生物のコミュニティを宿している.
- 堆積物における酸素消費は,硫化物の酸化と関連しており,これは栄養素の循環に不可欠なプロセスである.
- 以前の研究では,電流が未知の電子伝送器を介してこの結合を媒介することを示唆していました.
研究 の 目的:
- 海洋沈殿物の電流の原因となる電子運搬体を特定する.
- 酸素消費と硫化物の酸化を媒介するこれらのトランスポーターの役割を調査する.
- これらの自然導体の潜在的技術的応用を探求する.
主な方法:
- 海洋堆積物サンプルを地化学分析する.
- 微生物の微生物生命の顕微鏡観察は,電流を発揮する堆積物帯内で行われます.
- バクテリアの構造と電子伝送に関連する性質の特徴.
主要な成果:
- 堆積物の電流における原生伝導体として長糸状の細菌を特定した.
- これらのバクテリアは,電流を運ぶゾーンに豊富に存在することを観察しました.
- バクテリアの繊維に沿って,電子伝送器の機能と一致する独特の特性が見つかりました.
結論:
- 糸状バクテリアは,海洋堆積物の中に生きた電気ケーブルとして機能する.
- これらの微生物の導管は電子の移転を促進し,酸素消費と硫化物の酸化を結びつける.
- この発見は,微生物の相互作用を理解し,生物電気技術の開発のための新しい道を開く.
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