河口の微生物によるチンのメチル化

L E Hallas, J C Means, J J Cooney

Science (New York, N.Y.)

|March 19, 1982

まとめ

河口の微生物は,無機亜鉛を,ジメチルチンやトリメチルチンなどの有毒なオルガノチン化合物に変えます. この微生物によるメチル化により,亜鉛が動員され,水生環境における生態学的リスクが生じます.

科学分野:

環境微生物学環境微生物学
環境化学環境化学
バイオジオケミストリーバイオジオケミストリー

背景:

亜鉛化合物は,水生生態系における微生物の活動によって変形することがあります.
オルガノチン化合物は,毒性と環境への持続性で知られています.
河口の堆積物には,生物変容プロセスを行うことができる多様な微生物のコミュニティがあります.

研究の目的:

河口の堆積物における無機亜鉛の微生物による変換を調査する.
河口の微生物によって産生される特定のオルガノチン種を特定するために.
チェサピーク湾の生態系におけるチンの微生物メチル化の可能性を評価する.

主な方法:

無機亜鉛 (SnCl) のインキュベーション. 5H(2) O) と,チェサピーク湾の堆積物からの混合微生物インノキュラム.
ガスクロマトグラフィー・マススペクトロメトリー (GC-MS) を用いた変換製品の分析.
微生物の関与を確認するために,不妊および毒性のコントロールと比較.

主要な成果:

微生物による無機亜鉛の有機亜鉛化合物への変換が観察されました.
ディメチルチンとトリメチルチンの種が主要な製品として特定されました.
無菌または有毒の対照実験では,メチル化された亜鉛種は検出されなかった.

結論:

河口の微生物は,無機亜鉛を活性的にメチル化し,有毒なオルガノチン種を生成します.
微生物のメチル化は,河口環境における亜鉛の種化と動員に重要な役割を果たしています.
これらの発見は,水生生態系における微生物の亜鉛変異の生態学的影響を強調しています.

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