オートロフィックなアンモニア酸化海洋アーケオンの分離
Martin Könneke1, Anne E Bernhard, José R de la Torre
1Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, USA.
Nature
|September 24, 2005
まとめ
以前は極端動物と考えられていた海洋アーケアは,海洋に豊富に存在する. 研究者らは,窒素化を行うことができる海洋クレーナルカイオットを分離し,地球的な炭素と窒素のサイクルにおける重要な役割を明らかにした.
科学分野:
- 微生物学 微生物学とは
- 環境科学 環境科学
- バイオジオケミストリー バイオジオケミストリー
背景:
- 古代生物は歴史的に,限られた代謝多様性を持つ極端動物と見なされてきた.
- 培養から独立した研究では,冷たい海水で大量にCrenarchaeotaが発見されました.
- 海洋クレーナルカイオタは数値的に優位であり,地球規模の生地化学サイクルにおける重要な役割を果たしていることを示唆しています.
研究 の 目的:
- 海洋クレンアルキオタの代謝能力を調査する.
- これらの豊富な微生物が生地化学サイクルにおける役割を特定する.
- 海洋環境から発見された最初の窒素化アーカイアを特徴づける.
主な方法:
- 海洋クレーナーキオテスの隔離と栽培.
- ケモリトオオートロフィック成長実験.
- 単離物と環境配列の系統遺伝分析.
主要な成果:
- エアロビックアンモニアを窒素酸塩に酸化する海洋クレーナルカイオットの分離.
- この単離体におけるケモリトオオートロフィック成長の実証.
- 系統遺伝学的分析は,孤立体を豊富な環境の海洋クレンアルカイオータル配列と関連付けています.
結論:
- アーカイアにおける窒素化の最初の観察.
- 窒素化海洋クレーナルカイオタは,海洋の炭素と窒素の循環において重要な役割を果たす可能性がある.
- 極端な環境を超えたアルカイアの生態学的役割の理解を修正する.
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