Fig. 4
Oil-eating activity of Pseudomonas sp. ZS1 is impeded in the presence of Alcaligenes sp. CT10. Arrow indicates the presence of floating oil on the surface of cultures. a Change of cell mass and crude oil quantity in ZS1 culture. Upper panel shows the percentage of cell mass (Cell) and crude oil mass (Oil) detected in cultures at various time points indicated. Bottom panel shows the presence (with arrow) or absence (without arrow) of floating oil in culture flask. The 50% reduction of crude oil occurs at 10 days after growth. b Change of cell mass and crude oil quantity in CT10 culture. The display is identical to a. c Change of cell mass and crude oil quantity in ZS1 and CT10 mixed culture. The display is identical to a. d Dynamic change of ZS1 and CT10 populations in mixed culture indicated in (c)