Figure 1.

Effect of Ni addition on the growth of Sulfolobus solfataricus. Sulfolobus solfataricus was grown aerobically in a rotary shaker, at 80°C for 19 (gray columns) or 48 h (striped columns), in the presence of 0, 50, 100, 200, 400 and 800 μM nickel sulphate. Cell reading was performed at 600 nm.