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Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis

2017; Geological Society of America; Volume: 46; Issue: 2 Linguagem: Inglês

10.1130/g39829.1

1943-2682

Timothy M. Gibson, Patrick M. Shih, Vivien M. Cumming, Woodward W. Fischer, Peter W. Crockford, Malcolm S.W. Hodgskiss, Sarah Wörndle, Robert A. Creaser, R H Rainbird, T Skulski, Galen P. Halverson,

Microbial Community Ecology and Physiology

Research Article| December 08, 2017 Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis Timothy M. Gibson; Timothy M. Gibson 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Patrick M. Shih; Patrick M. Shih 2Joint BioEnergy Institute, Emeryville, California 94608, USA3Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Search for other works by this author on: GSW Google Scholar Vivien M. Cumming; Vivien M. Cumming 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Woodward W. Fischer; Woodward W. Fischer 4Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Peter W. Crockford; Peter W. Crockford 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Malcolm S.W. Hodgskiss; Malcolm S.W. Hodgskiss 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Sarah Wörndle; Sarah Wörndle 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Robert A. Creaser; Robert A. Creaser 5Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar Robert H. Rainbird; Robert H. Rainbird 6Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar Thomas M. Skulski; Thomas M. Skulski 6Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar Galen P. Halverson Galen P. Halverson 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Timothy M. Gibson 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Patrick M. Shih 2Joint BioEnergy Institute, Emeryville, California 94608, USA3Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Vivien M. Cumming 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Woodward W. Fischer 4Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA Peter W. Crockford 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Malcolm S.W. Hodgskiss 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Sarah Wörndle 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Robert A. Creaser 5Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Robert H. Rainbird 6Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada Thomas M. Skulski 6Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada Galen P. Halverson 1Department of Earth and Planetary Sciences/GEOTOP, McGill University, Montréal, Quebec H3A 0E8, Canada Publisher: Geological Society of America Received: 17 Aug 2017 Revision Received: 26 Oct 2017 Accepted: 27 Oct 2017 First Online: 08 Dec 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2018) 46 (2): 135–138. https://doi.org/10.1130/G39829.1 Article history Received: 17 Aug 2017 Revision Received: 26 Oct 2017 Accepted: 27 Oct 2017 First Online: 08 Dec 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Timothy M. Gibson, Patrick M. Shih, Vivien M. Cumming, Woodward W. Fischer, Peter W. Crockford, Malcolm S.W. Hodgskiss, Sarah Wörndle, Robert A. Creaser, Robert H. Rainbird, Thomas M. Skulski, Galen P. Halverson; Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis. Geology 2017;; 46 (2): 135–138. doi: https://doi.org/10.1130/G39829.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Although the geological record indicates that eukaryotes evolved by 1.9–1.4 Ga, their early evolution is poorly resolved taxonomically and chronologically. The fossil red alga Bangiomorpha pubescens is the only recognized crown-group eukaryote older than ca. 0.8 Ga and marks the earliest known expression of extant forms of multicellularity and eukaryotic photosynthesis. Because it postdates the divergence between the red and green algae and the prior endosymbiotic event that gave rise to the chloroplast, B. pubescens is uniquely important for calibrating eukaryotic evolution. However, molecular clock estimates for the divergence between the red and green algae are highly variable, and some analyses estimate this split to be younger than the widely inferred but poorly constrained first appearance age of 1.2 Ga for B. pubescens. As a result, many molecular clock studies reject this fossil ex post facto. Here we present new Re-Os isotopic ages from sedimentary rocks that stratigraphically bracket the occurrence of B. pubescens in the Bylot Supergroup of Baffin Island and revise its first appearance to 1.047 +0.013/–0.017 Ga. This date is 150 m.y. younger than commonly held interpretations and permits more precise estimates of early eukaryotic evolution. Using cross-calibrated molecular clock analyses with the new fossil age, we calculate that photosynthesis within the Eukarya emerged ca. 1.25 Ga. This date for primary plastid endosymbiosis serves as a benchmark for interpreting the fossil record of early eukaryotes and evaluating their role in the Proterozoic biosphere. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.