Figure 4

Effect of Pb or Cd on total protein content (mg mL ^-1 PCV) in Chlorella sorokiniana cells after 2 and 24 h. Data are means ± SE (n = 3). In the algal culture, Pb and Cd were supplied as 250 μM (particulars in Materials and Methods). Columns labeled with different letters indicate statistically significant differences (P < 0.05, ANOVA, Tukey multiple comparison).