FIGURE 2.

Flocculation efficiency as a function of different metal cations and their concentrations in wild-type and cell wall-deficient Chlamydomonas reinhardtii strain at near neutral pH conditions. (A) Wild-type CC1690; (B) cell wall deficient mutant sta6; (C) CC400; (D) sta6-C6. Cells were grown to stationary phase and the pH of the medium was ∼8.5. The data was analyzed for significant differences using the Student’s t-test (n = 3) (each mutant in comparison with wild-type). Asterisks indicate a significant difference from the control (wild-type) (^∗p < 0.05, ^∗∗p < 0.01).