Nature Search

Purple sulfur bacteria fix N₂ via molybdenum-nitrogenase in a low molybdenum Proterozoic ocean analogue

N₂ fixation was key to the expansion of life on Earth, but which organisms fixed N₂ and if Mo-nitrogenase was functional in the low Mo early ocean is unknown. Here, the authors show that purple sulfur bacteria fix N₂ using Mo-nitrogenase in a Proterozoic ocean analogue, despite low Mo conditions.

Miriam Philippi
Katharina Kitzinger
Marcel M. M. Kuypers
ResearchOpen Access06 Aug 2021
Nature Communications

Volume: 12, P: 1-12
Doubling of marine dinitrogen-fixation rates based on direct measurements

A newly developed method of measuring oceanic nitrogen-fixation rates provides significantly higher estimates than a current widely applied technique, and could close gaps in the marine nitrogen budget.

Tobias Großkopf
Wiebke Mohr
Julie LaRoche
Research08 Aug 2012
Nature

Volume: 488, P: 361-364
Methylphosphonate-driven methane formation and its link to primary production in the oligotrophic North Atlantic

The origin of methane in oxic waters of the open ocean remains uncertain. This study documents methylphosphonate-driven methane formation in the tropical North Atlantic, providing insights into the ecological importance of phosphonates in the carbon cycle of the oligotrophic ocean.

Jan N. von Arx
Abiel T. Kidane
Jana Milucka
ResearchOpen Access16 Oct 2023
Nature Communications

Volume: 14, P: 1-11
Rhizobia–diatom symbiosis fixes missing nitrogen in the ocean

A symbiosis between a diatom and a newly discovered species of alphaproteobacteria, ‘Candidatus Tectiglobus diatomicola’, can fix nitrogen in the ocean, providing evidence that nitrogen fixers other than cyanobacteria have a key role in the marine environment.

Bernhard Tschitschko
Mertcan Esti
Marcel M. M. Kuypers
ResearchOpen Access09 May 2024
Nature

Volume: 630, P: 899-904
Terrestrial-type nitrogen-fixing symbiosis between seagrass and a marine bacterium

The N₂-fixing symbiont ‘Candidatus Celerinatantimonas neptuna’ lives inside the root tissue of the seagrass Posidonia oceanica, providing ammonia and amino acids to its host in exchange for sugars and enabling highly productive seagrass meadows to thrive in the nitrogen-limited Mediterranean Sea.

Wiebke Mohr
Nadine Lehnen
Marcel M. M. Kuypers
ResearchOpen Access03 Nov 2021
Nature

Volume: 600, P: 105-109
The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle

The symbiotic cyanobacterium UCYN-A was found to contribute to ∼20% of the nitrogen fixation in the tropical North Atlantic Ocean, and is more widely distributed throughout tropical, temperate and polar oceans than previously thought.

Clara Martínez-Pérez
Wiebke Mohr
Marcel M. M. Kuypers
Research12 Sept 2016
Nature Microbiology

Volume: 1, P: 1-7
The effect of nutrients on carbon and nitrogen fixation by the UCYN-A–haptophyte symbiosis

Andreas Krupke
Wiebke Mohr
Marcel MM Kuypers
Research23 Dec 2014
The ISME Journal

Volume: 9, P: 1635-1647
Applying label-free dynamic mass redistribution technology to frame signaling of G protein–coupled receptors noninvasively in living cells

Ralf Schröder
Johannes Schmidt
Evi Kostenis
Protocols20 Oct 2011
Nature Protocols

Volume: 6, P: 1748-1760
Niche partitioning by photosynthetic plankton as a driver of CO₂-fixation across the oligotrophic South Pacific Subtropical Ocean

Julia Duerschlag
Wiebke Mohr
Marcel M. M. Kuypers
ResearchOpen Access19 Aug 2021
The ISME Journal

Volume: 16, P: 465-476
Phosphate availability affects fixed nitrogen transfer from diazotrophs to their epibionts

Niels J. Schoffelen
Wiebke Mohr
Marcel M. M. Kuypers
ResearchOpen Access27 Jun 2019
The ISME Journal

Volume: 13, P: 2701-2713
Single-cell imaging of phosphorus uptake shows that key harmful algae rely on different phosphorus sources for growth

Niels J. Schoffelen
Wiebke Mohr
Marcel M. M. Kuypers
ResearchOpen Access21 Nov 2018
Scientific Reports

Volume: 8, P: 1-13

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