Palaeogenomics of the Hydrocarbon Producing Microalga Botryococcus braunii.

Autor: Tennant RK; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK., Lux TM; Plant Genome and Systems Biology, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Munich, Germany., Sambles CM; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK., Kuhn NJ; Physical Geography and Environmental Change Research Group, University of Basel, Klingelbergstrasse 27, CH-4056, Basel, Switzerland., Petticrew EL; Geography Program and Quesnel River Research Centre, University of Northern British Columbia, 3333 University Way, Prince George, BC, V2N 4Z9, Canada., Oldfield R; Shell Technology Centre, 3333 Highway 6 South, Houston, Texas, 77082-3101, USA., Parker DA; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK.; Shell Technology Centre, 3333 Highway 6 South, Houston, Texas, 77082-3101, USA., Hatton J; Geography, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4RJ, UK., Moore KA; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK., Lee R; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK., Turney CSM; Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia., Jones RT, Love J; Biosciences, College of Environmental and Life Sciences, The University of Exeter, Exeter, EX4 4QD, UK. J.Love@exeter.ac.uk.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2019 Feb 11; Vol. 9 (1), pp. 1776. Date of Electronic Publication: 2019 Feb 11.
DOI: 10.1038/s41598-018-38236-5
Abstrakt: Botryococcus braunii is a colonial microalga that appears early in the fossil record and is a sensitive proxy of environmental and hydroclimatic conditions. Palaeozoic Botryococcus fossils which contribute up to 90% of oil shales and approximately 1% of crude oil, co-localise with diagnostic geolipids from the degradation of source-signature hydrocarbons. However more recent Holocene sediments demonstrate no such association. Consequently, Botryococcus are identified in younger sediments by morphology alone, where potential misclassifications could lead to inaccurate paleoenvironmental reconstructions. Here we show that a combination of flow cytometry and ancient DNA (aDNA) sequencing can unambiguously identify Botryococcus microfossils in Holocene sediments with hitherto unparalleled accuracy and rapidity. The application of aDNA sequencing to microfossils offers a far-reaching opportunity for understanding environmental change in the recent geological record. When allied with other high-resolution palaeoenvironmental information such as aDNA sequencing of humans and megafauna, aDNA from microfossils may allow a deeper and more precise understanding of past environments, ecologies and migrations.
Databáze: MEDLINE
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