Cellular and non-cellular mineralization of organic carbon in soils with contrasted physicochemical properties.

ABSTRACT: It has been recently demonstrated that soil organic carbon (SOC) mineralization is supported by intracellular respiration of heterotrophic microorganisms and by non-cellular oxidative processes. However, little is known about the prevalence and drivers of non-cellular SOC mineralization among soils. In this study, untreated and gamma-irradiated soils sampled along a latitudinal gradient and exhibiting contrasted physicochemical properties were incubated in order to quantify potential non-cellular SOC mineralization and to identify its sensibility to soil properties. In sterilized and unsterilized soils, CO₂ emission mirrored O₂ consumption signifying the presence of several coupled redox reactions transferring electrons from organic C to intermediate acceptors and to

SUBMITTER: Benoit K 

PROVIDER: S-EPMC6420085 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature