Abstract
The denitrifier Flexibacter canadensis, in the presence of sulfide, can reduce N2O in the presence of concentrations of C2H2 which normally inhibit N2O reduction. Most-probable-number estimates of naturally occurring F. canadensis populations in various soils and sediments were made with a bacteriophage which is active against and specific for a strain of denitrifying F. canadensis (Is-11). Our survey suggests that F. canadensis is common in the natural environment.
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