Fig. 6

ZS1 growth in medium with crude oil as sole carbon source. a Growth curve analysis of ZS1 isolate in MS medium supplemented with 1% crude oil. X- and Y-axis indicate time (days) and percent of mass (%) of crude oil or cell biomass. Maximum level (or 100%) of crude oil and cell biomass are 10 and 6.5 g/l, respectively. Dash-line indicates 50% crude oil remained after growth for 12 day. b Degradation of crude oil by ZS1 isolate. Images show crude oil in shake-flask containing ZS1 culture at various time points during growth. Arrowhead and arrow indicate the unemulsified and emulsified crude oils, respectively. c Growth curve analysis of ZS1 isolate in MS medium supplemented with 1% hexadecane. The display is identical to a