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| Titel |
An unknown oxidative metabolism substantially contributes to soil CO2 emissions |
| VerfasserIn |
V. Maire, G. Alvarez, J. Colombet, A. Comby, R. Despinasse, E. Dubreucq, M. Joly, A.-C. Lehours, V. Perrier, T. Shahzad, S. Fontaine |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 2 ; Nr. 10, no. 2 (2013-02-21), S.1155-1167 |
| Datensatznummer |
250017525
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| Publikation (Nr.) |
 copernicus.org/bg-10-1155-2013.pdf |
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| Zusammenfassung |
| 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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