Origins of life and biochemistry under high-pressure conditions

被引:200
作者
Daniel, Isabelle
Oger, Philippe
Winter, Roland
机构
[1] Univ Lyon 1, ENS Lyon, Lab Sci Terre, CNRS,UMR 5570, F-69622 Villeurbanne, France
[2] Univ Lyon 1, ENS Lyon, Lab Sci Terre, CNRS,UMR 5570, F-69364 Lyon 07, France
[3] Univ Dortmund, Dept Chem, D-44227 Dortmund, Germany
关键词
D O I
10.1039/b517766a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Life on Earth can be traced back to as far as 3.8 billion years (Ga) ago. The catastrophic meteoritic bombardment ended between 4.2 and 3.9 Ga ago. Therefore, if life emerged, and we know it did, it must have emerged from nothingness in less than 400 million years. The most recent scenarios of Earth accretion predict some very unstable physico-chemical conditions at the surface of Earth, which, in such a short time period, would impede the emergence of life from a proto-biotic soup. A possible alternative would be that life originated in the depth of the proto-ocean of the Hadean Earth, under high hydrostatic pressure. The large body of water would filter harmful radiation and buffer physico-chemical variations, and therefore would provide a more stable radiation-free environment for pre-biotic chemistry. After a short introduction to Earth history, the current tutorial review presents biological and physico-chemical arguments in support of high-pressure origin for life on Earth.
引用
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页码:858 / 875
页数:18
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