此湖泥中砷含量高,NASA公布的新发现物种试验,就是用这里的含砷毒泥巴喂细菌

来源: 庄之蝶 2010-12-03 12:20:03 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 次 (872 bytes)
回答: 雪后的梦娜湖xianren5582010-12-02 11:47:49

To test her hypothesis, Wolfe-Simon collected mud from Mono Lake, California, a desert body of water known for having high arsenic levels, and grew the microorganisms from it in increasing concentrations of arsenate. She didn't add any phosphate or other phosphorus-containing compounds to the growth medium, as is typically done to sustain microbes. Instead, she periodically transferred the growing cultures to a new dish to reduce the concentration of any original phosphorus to the point that any microbe making new DNA or other biomolecules would need to use the arsenic to survive.

------Science 3 December 2010

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