Fig. 2
Analysis of endogenous H2S and cysteine contents in T thermophila. a Changes of H2S content in various Cd concentrations. b Changes of cysteine content in various Cd concentrations. c The effects of cysteine on H2S content under Cd stress. Cells were treated with 1 mM cysteine, 30 μM Cd (C), and 30 μM Cd+ 1 mM cysteine (C+Cysteine) for 6 h. Data are means ± SE of three biological repeats, error bars indicate error standard. Means denoted by the same letter were not significantly different at P > 0.05, and different letters indicate statistically significantly differences (P < 0.05) by Duncan Multiple Range Test (DMRT)