de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

An unknown oxidative metabolism substantially contributes to soil CO2 emissions

MPS-Authors
There are no MPG-Authors available
Locator
Fulltext (public)

BPR022.pdf
(Publisher version), 865KB

Supplementary Material (public)
There is no public supplementary material available
Citation

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.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-4DB5-2
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.