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. 2015 Feb 27;81(6):1942–1948. doi: 10.1128/AEM.03688-14

FIG 4.

FIG 4

Response of NO2 production by N. viennensis after acetylene or octyne exposure. Cells were exposed for 2 h to either 6 μM acetylene or 40 μM octyne in media with 0.5 mM NH4+. Alkyne and no-alkyne treatments were then degassed and NH4+ increased to 2 mM. NO2 accumulation was monitored after alkyne exposure for 4 h. Bars represent the average activity in three replicate treatments. Error bars represent the standard deviations of the average. Lowercase letters indicate the significance (P ≤ 0.02) of sampling time within a specific treatment. Values that have lowercase letters in common are not significantly different.