Fig. 6

Dynamics of a NO3−, b NO2−, and c N2O (μM) in growth medium quantified by Griess colometric reaction and microsensor measurements directly in growth medium. NO3− and NO2− measurements are based on duplicate sampling from medium (error bars too small to be visualised), and N2O concentration represents on a single measurement directly in medium. Significant differences as indicated. n.s. not significant; ****p ≤ 0.0001