Pyrite-Induced Hydrogen Peroxide Formation as a Driving Force in the Evolution of Photosynthetic Organisms on an Early Earth
Pyrite-Induced Hydrogen Peroxide Formation as a Driving Force in the Evolution of Photosynthetic Organisms on an Early Earth
复制标题
DOI：
10.1089/15311070152757474
复制
发表时间：
2001-09-01
期刊：
影响因子：
4.2
通讯作者：
Strongin, Daniel R.
中科院分区：
文献类型：
--
作者：
Borda, Michael J.;Elsetinow, Alicia R.;Strongin, Daniel R.
黄铁矿诱导过氧化氢（H2O2）的显著发现为含氧光合作用的进化提供了关键的一步。在没有溶解氧的情况下，通过黄铁矿和H2O之间的反应可以快速生成H2O2。反应在黑暗中进行，H2O2水平在可见光照射下增加。由于在O-2水平上升之前，黄铁矿在大多数光环境中是稳定的，这一发现代表了早期地球上H2O2形成的重要机制。
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.