Table 1. Growth parameters for the Desulfovibrio vulgaris Hildenborough strains.

Genotype	Condition	Growth rate μ (h -1 )	Doubling time (h)	Final biomass (x10 9 cells.ml -1 )
WT	anaerobic	0.13	5.21	0.55 ± 0.03 a
	0.02% O2	0.05	14.28	0.29 ± 0.03 b , c
Δbd	anaerobic	0.13	5.33	0.54 ± 0.02
	0.02% O2	0.04	15.61	0.22 ± 0.03 b
Δcox	anaerobic	0.12	5.97	0.45 ± 0.02 a
	0.02% O2	0.04	15.53	0.19 ± 0.04 c
Δcoxbd	anaerobic	0.13	5.33	0.55 ± 0.03
	0.02% O2	nd	nd	0.27 ± 0.03

DvH strains were grown in lactate/sulfate medium under anaerobic conditions or under constant 0.02% O₂ gas mixture sparging. Data are mean values of five independent experiments. Statistical analysis using t-test was used to compare means.

^{a, b, c}: Significant differences (p<0.05). nd: not determined.