Persistence of the dominant soil phylum Acidobacteria by trace gas scavenging

Proceedings of the National Academy of Sciences of the United States of America
Chris GreeningGregory M Cook

Abstract

The majority of microbial cells in global soils exist in a spectrum of dormant states. However, the metabolic processes that enable them to survive environmental challenges, such as nutrient-limitation, remain to be elucidated. In this work, we demonstrate that energy-starved cultures of Pyrinomonas methylaliphatogenes, an aerobic heterotrophic acidobacterium isolated from New Zealand volcanic soils, persist by scavenging the picomolar concentrations of H2 distributed throughout the atmosphere. Following the transition from exponential to stationary phase due to glucose limitation, the bacterium up-regulates by fourfold the expression of an eight-gene operon encoding an actinobacteria-type H2-uptake [NiFe]-hydrogenase. Whole-cells of the organism consume atmospheric H2 in a first-order kinetic process. Hydrogen oxidation occurred most rapidly under oxic conditions and was weakly associated with the cell membrane. We propose that atmospheric H2 scavenging serves as a mechanism to sustain the respiratory chain of P. methylaliphatogenes when organic electron donors are scarce. As the first observation of H2 oxidation to our knowledge in the Acidobacteria, the second most dominant soil phylum, this work identifies new sinks in the ...Continue Reading

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Citations

Jan 19, 2016·Environmental Microbiology·Chris Greening, Robert J Maier
Jun 16, 2016·Frontiers in Microbiology·Anna M KielakEiko E Kuramae
Dec 5, 2015·Environmental Microbiology·Manabu KannoYoichi Kamagata
Sep 28, 2016·Scientific Reports·Dan SøndergaardChris Greening
Jan 13, 2018·Environmental Microbiology·Stephanie A EichorstDagmar Woebken
Aug 16, 2016·Global Change Biology·Laura K MeredithRonald G Prinn
Feb 25, 2018·The ISME Journal·Bela HausmannAlexander Loy
Apr 2, 2017·Applied and Environmental Microbiology·Mondher KhdhiriPhilippe Constant
Oct 17, 2018·International Journal of Systematic and Evolutionary Microbiology·Svetlana N Dedysh, Pelin Yilmaz
Aug 5, 2017·The ISME Journal·Carlo R CarereMatthew B Stott
Jan 31, 2020·Canadian Journal of Microbiology·Julien Saavedra-LavoiePhilippe Constant
Jul 31, 2019·The ISME Journal·Paul R F CorderoChris Greening
Jul 4, 2020·Microbial Ecology·Otávio Henrique Bezerra PintoCristine Chaves Barreto
Jul 25, 2018·Nature Communications·Jean F PowerMatthew B Stott
Jul 11, 2020·The ISME Journal·Zahra F IslamChris Greening
Apr 16, 2020·MSystems·Pok Man LeungChris Greening
Mar 5, 2019·Frontiers in Microbiology·Sam LambrechtsGuillaume Tahon
Jan 16, 2021·Microorganisms·Alexander Tøsdal TveitMette Marianne Svenning
Nov 17, 2020·Frontiers in Microbiology·Sadaf KalamNi Luh Suriani
Jan 6, 2021·Nature Microbiology·Sean K BayChris Greening
Jan 10, 2021·Proceedings of the National Academy of Sciences of the United States of America·Eric C DunhamEric S Boyd
Jul 22, 2021·Proceedings of the National Academy of Sciences of the United States of America·Eleonora ChiriChris Greening
Sep 1, 2021·Trends in Microbiology·Chris GreeningSean K Bay

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