Large perturbations in CO 2 flux and subsequent chemosynthesis are induced in agricultural soil by the addition of elemental sulfur.

Autor: Kelleher BP; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland. brian.kelleher@dcu.ie., Flanagan PV; The School of Biological Sciences, Queen's University Belfast, Medical Biology Centre, Lisburn Road, Belfast, BT9 5AG, Northern, Ireland., Hart KM; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland., Simpson AJ; Department of Chemistry, Division of Physical and Environmental Science, University of Toronto at Scarborough, 1265 Military, Trail, Toronto, Ontario, M1C 1A4, Canada., Oppenheimer SF; Department of Mathematics and Statistics, Shackouls Honors College, Mississippi State University, Mississippi State, Mississippi, 39762, USA., Murphy BT; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland., O'Reilly SS; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland., Jordan SF; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland., Grey A; School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland., Ibrahim A; The School of Biological Sciences, Queen's University Belfast, Medical Biology Centre, Lisburn Road, Belfast, BT9 5AG, Northern, Ireland., Allen CCR; The School of Biological Sciences, Queen's University Belfast, Medical Biology Centre, Lisburn Road, Belfast, BT9 5AG, Northern, Ireland. c.allen@qub.ac.uk.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2017 Jul 05; Vol. 7 (1), pp. 4732. Date of Electronic Publication: 2017 Jul 05.
DOI: 10.1038/s41598-017-04934-9
Abstrakt: The microbial contribution to soil organic matter has been shown to be much larger than previously thought and thus it plays a major role in carbon cycling. Among soil microorganisms, chemoautotrophs can fix CO 2 without sunlight and can glean energy through the oxidation of reduced elements such as sulfur. Here we show that the addition of sulfur to soil results in an initial surge in production of CO 2 through microbial respiration, followed by an order of magnitude increase in the capture of carbon from the atmosphere as elemental sulfur is oxidised to sulfate. Thiobacillus spp., take advantage of specific conditions to become the dominant chemoautotrophic group that consumes CO 2 . We discern the direct incorporation of atmospheric carbon into soil carbohydrate, protein and aliphatic compounds and differentiate these from existing biomass. These results suggest that chemoautotrophs can play a large role in carbon cycling and that this carbon is heavily influenced by land management practises.
Databáze: MEDLINE
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