Pyrite-Induced Hydrogen Peroxide Formation as a Driving Force in the Evolution of Photosynthetic Organisms on an Early Earth

被引：136

作者：

Borda, Michael J. ^{[1
]}

Elsetinow, Alicia R. ^{[2
]}

Schoonen, Martin A. ^{[1
]}

Strongin, Daniel R. ^{[2
]}

机构：

[1] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA

[2] Temple Univ, Dept Chem, Philadelphia, PA 19122 USA

来源：

ASTROBIOLOGY | 2001年 / 1卷 / 03期

关键词：

Hydrogen peroxide; Oxygenic photosynthesis; Evolution; Pyrite;

D O I：

10.1089/15311070152757474

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The remarkable discovery of pyrite-induced hydrogen peroxide (H2O2) provides a key step in the evolution of oxygenic photosynthesis. Here we show that H2O2 can be generated rapidly via a reaction between pyrite and H2O in the absence of dissolved oxygen. The reaction proceeds in the dark, and H2O2 levels increase upon illumination with visible light. Since pyrite was stable in most photic environments prior to the rise of O-2 levels, this finding represents an important mechanism for the formation of H2O2 on early Earth.

引用

页码：283 / 288

页数：6

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