气候变化领域集成服务门户(CCPortal): Temporal variation of planetary iron as a driver of evolution

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DOI	10.1073/pnas.2109865118
	Temporal variation of planetary iron as a driver of evolution
	Wade J.; Byrne D.J.; Ballentine C.J.; Drakesmith H.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:51
英文摘要	Iron is an irreplaceable component of proteins and enzyme systems required for life. This need for iron is a well-characterized evolutionary mechanism for genetic selection. However, there is limited consideration of how iron bioavailability, initially determined by planetary accretion but fluctuating considerably at global scale over geological time frames, has shaped the biosphere. We describe influences of iron on planetary habitability from formation events >4 Gya and initiation of biochemistry from geochemistry through oxygenation of the atmosphere to current host–pathogen dynamics. By determining the iron and transition element distribution within the terrestrial planets, planetary core formation is a constraint on both the crustal composition and the longevity of surface water, hence a planet’s habitability. As such, stellar compositions, combined with metallic core-mass fraction, may be an observable characteristic of exoplanets that relates to their ability to support life. On Earth, the stepwise rise of atmospheric oxygen effectively removed gigatons of soluble ferrous iron from habitats, generating evolutionary pressures. Phagocytic, infectious, and symbiotic behaviors, dating from around the Great Oxygenation Event, refocused iron acquisition onto biotic sources, while eukaryotic multicellularity allows iron recycling within an organism. These developments allow life to more efficiently utilize a scarce but vital nutrient. Initiation of terrestrial life benefitted from the biochemical properties of abundant mantle/crustal iron, but the subsequent loss of iron bioavailability may have been an equally important driver of compensatory diversity. This latter concept may have relevance for the predicted future increase in iron deficiency across the food chain caused by elevated atmospheric CO2. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Complex life; Evolution; Iron; Oxygenation; Planetary habitability
语种	英语
scopus关键词	iron; siderophore; water; astronomy; bioavailability; chemistry; ecosystem; evolution; genetic variation; geology; host pathogen interaction; metabolism; oxidation reduction reaction; Biological Availability; Biological Evolution; Earth, Planet; Ecosystem; Evolution, Planetary; Genetic Variation; Geology; Host-Pathogen Interactions; Iron; Oxidation-Reduction; Siderophores; Water
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250925
作者单位	Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, United Kingdom; Centre de Recherches Petrographiques et Geochimiques, UMR 7358 CNRS—Universite de Lorraine, BP 20, Vandoeuvre-les-Nancy, F-54501, France; MRC (Medical Research Council) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
推荐引用方式 GB/T 7714	Wade J.,Byrne D.J.,Ballentine C.J.,et al. Temporal variation of planetary iron as a driver of evolution[J],2021,118(51).
APA	Wade J.,Byrne D.J.,Ballentine C.J.,&Drakesmith H..(2021).Temporal variation of planetary iron as a driver of evolution.Proceedings of the National Academy of Sciences of the United States of America,118(51).
MLA	Wade J.,et al."Temporal variation of planetary iron as a driver of evolution".Proceedings of the National Academy of Sciences of the United States of America 118.51(2021).