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  An unknown oxidative metabolism substantially contributes to soil CO2 emissions

Maire, V., Alvarez, G., Colombet, J., Comby, A., Despinasse, R., Dubreucq, E., et al. (2013). An unknown oxidative metabolism substantially contributes to soil CO2 emissions. Biogeosciences, 10, 1155-1167. doi:10.5194/bg-10-1155-2013.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0014-4DB5-2 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-49C9-E
Genre: Journal Article

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http://dx.doi.org/10.5194/bg-10-1155-2013 (Publisher version)
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 Creators:
Maire, V.1, Author
Alvarez, G., Author
Colombet, J., Author
Comby, A., Author
Despinasse, R., Author
Dubreucq, E., Author
Joly, M., Author
Lehours, A.-C., Author
Perrier, V., Author
Shahzad, T., Author
Fontaine, S., Author
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1External Organizations, ou_persistent22              

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 Abstract: The respiratory release of CO2 from soils is a major determinant of the global carbon cycle. It is traditionally considered that this respiration is an intracellular metabolism consisting of complex biochemical reactions carried out by numerous enzymes and co-factors. Here we show that the endoenzymes released from dead organisms are stabilised in soils and have access to suitable substrates and co-factors to permit function. These enzymes reconstitute an extracellular oxidative metabolism (EXOMET) that may substantially contribute to soil respiration (16 to 48% of CO2 released from soils in the present study). EXOMET and respiration from living organisms should be considered separately when studying effects of environmental factors on the C cycle because EXOMET shows specific properties such as resistance to high temperature and toxic compounds.

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 Dates: 2013-01-272013-02-21
 Publication Status: Published online
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 Identifiers: Other: BPR022
DOI: 10.5194/bg-10-1155-2013
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Title: Biogeosciences
  Other : Biogeosciences
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : Copernicus GmbH on behalf of the European Geosciences Union
Pages: - Volume / Issue: 10 Sequence Number: - Start / End Page: 1155 - 1167 Identifier: ISSN: 1726-4170
CoNE: https://pure.mpg.de/cone/journals/resource/111087929276006