Increase in Nitrate Reductase Activity with Ammonium Chloride in Bacillus licheniformis by Shaking Culture.

In shaking culture, nitrate reductase activity in the cell-free extracts of Bacillus licheniformis increased with the addition of NH4Cl to the medium containing NaNO3 as a single nitrogen source, where amounts of nitrogen sources were sufficient for cell growth. This increase of nitrate reductase activity therefore suggests that the activity is not for nitrate assimilation but for other physiological functions containing a dissimilatory nitrate reduction.