Impaired reduction of N2O to N2 in acid soils is due to a posttranscriptional interference with the expression of nosZ.

ABSTRACT:

Unlabelled

Accumulating empirical evidence over the last 60 years has shown that the reduction of N2O to N2 is impaired by low soil pH, suggesting that liming of acid soils may reduce N2O emissions. This option has not gained much momentum in global change research, however, possibly due to limited understanding of why low pH interferes with N2O reductase. We hypothesized that the reason is that denitrifying organisms in soils are unable to assemble functional N2O reductase (N2OR) at low pH, as shown to be the case for the model strain Paracoccus denitrificans. We tested this by experiments with bacteria extracted from soils by density gradient centrifugation. The soils were sampled from a long-term liming experiment (soil pH 4.0, 6.1, and 8.0). The cells were incubated (stirred ba

SUBMITTER: Liu B 

PROVIDER: S-EPMC4073493 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature