Geomicrobiology, Center for Applied Geosciences, University of Tübingen, 72076, Tübingen, Germany.
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada.
Free Radic Biol Med. 2019 Aug 20;140:154-166. doi: 10.1016/j.freeradbiomed.2019.07.014. Epub 2019 Jul 16.
Iron is the most abundant redox active metal on Earth and thus provides one of the most important records of the redox state of Earth's ancient atmosphere, oceans and landmasses over geological time. The most dramatic shifts in the Earth's iron cycle occurred during the oxidation of Earth's atmosphere. However, tracking the spatial and temporal development of the iron cycle is complicated by uncertainties about both the timing and location of the evolution of oxygenic photosynthesis, and by the myriad of microbial processes that act to cycle iron between redox states. In this review, we piece together the geological evidence to assess where and when oxygenic photosynthesis likely evolved, and attempt to evaluate the influence of this innovation on the microbial iron cycle.
铁是地球上最丰富的氧化还原活性金属，因此提供了地球古代大气、海洋和陆地在地质时间内氧化还原状态的最重要记录之一。地球铁循环中最显著的变化发生在地球大气的氧化过程中。然而，追踪铁循环的时空发展受到两个方面不确定性的影响，一是光合作用演化的时间和地点，二是微生物过程将铁在氧化还原状态之间循环的众多作用。在这篇综述中，我们将地质证据拼凑起来，以评估光合作用可能在哪里和何时进化，并尝试评估这种创新对微生物铁循环的影响。
