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Efficient CO2 fixation by surface Prochlorococcus in the Atlantic Ocean
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Hartmann, Manuela, Gómez-Pereira, Paola R., Grob, Carolina, Ostrowski, Martin, Scanlan, David J. and Zubkov, Mikhail V. (2014) Efficient CO2 fixation by surface Prochlorococcus in the Atlantic Ocean. The ISME Journal, Volume 8 (Number 11). pp. 2280-2289. doi:10.1038/ismej.2014.56 ISSN 1751-7362.
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Official URL: http://dx.doi.org/10.1038/ismej.2014.56
Abstract
Nearly half of the Earth’s surface is covered by the ocean populated by the most abundant photosynthetic organisms on the planet—Prochlorococcus cyanobacteria. However, in the oligotrophic open ocean, the majority of their cells in the top half of the photic layer have levels of photosynthetic pigmentation barely detectable by flow cytometry, suggesting low efficiency of CO2 fixation compared with other phytoplankton living in the same waters. To test the latter assumption, CO2 fixation rates of flow cytometrically sorted 14C-labelled phytoplankton cells were directly compared in surface waters of the open Atlantic Ocean (30°S to 30°N). CO2 fixation rates of Prochlorococcus are at least 1.5–2.0 times higher than CO2 fixation rates of the smallest plastidic protists and Synechococcus cyanobacteria when normalised to photosynthetic pigmentation assessed using cellular red autofluorescence. Therefore, our data indicate that in oligotrophic oceanic surface waters, pigment minimisation allows Prochlorococcus cells to harvest plentiful sunlight more effectively than other phytoplankton.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QH Natural history > QH426 Genetics Q Science > QK Botany |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
Library of Congress Subject Headings (LCSH): | Chlorophyll , Phytoplankton, Marine phytoplankton -- Absorption and adsorption, Chlorophyll -- Analysis -- Mathematical models, Flow cytometry | ||||||||
Journal or Publication Title: | The ISME Journal | ||||||||
Publisher: | Nature Publishing Group | ||||||||
ISSN: | 1751-7362 | ||||||||
Official Date: | 24 April 2014 | ||||||||
Dates: |
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Volume: | Volume 8 | ||||||||
Number: | Number 11 | ||||||||
Page Range: | pp. 2280-2289 | ||||||||
DOI: | 10.1038/ismej.2014.56 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 28 December 2015 | ||||||||
Date of first compliant Open Access: | 28 December 2015 | ||||||||
Funder: | Commission of the European Communities, Natural Environment Research Council (Great Britain) (NERC) | ||||||||
Grant number: | 265294 (Commission of the European Communities FP7), NE/E016138/1 (NERC), NE/G005125/1 (NERC) | ||||||||
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