TABLE 2.

Growth rates (μ) and doubling times (tD) of the WT strain and RU-1 grown under different oxygen and iron concentrations

StrainParameterResulta under the following culture conditions
2% O2 and:0% O2 and 50 μM Fe citrate21% O2 and 50 μM Fe citrate
5 μM Fe citrate50 μM Fe citrate250 μM Fe citrate
WTμ (h−1)0.169 (±0.010)0.162 (±0.001)0.165 (±0.010)0.148 (±0.015)0.121 (±0.013)
tD (h)4.10 (±0.24)4.29 (±0.02)4.19 (±0.26)4.68 (±0.68)5.73 (±0.60)
RU-1μ (h−1)0.167 (±0.003)0.158 (±0.001)0.149 (±0.019)0.124 (±0.003)0.090 (±0.002)
tD (h)4.16 (±0.07)4.40 (±0.00)4.64 (±0.59)5.60 (±0.14)7.70 (±0.17)
  • a Values are the sample means of at least replicate cultures. Sample standard deviations are given in parentheses.