Effects of chlorination on chlorophyll a (A) and cartenoids contents of P. tricornutum in 24 h at 20 °C and 40 μmol m−2 s−1 cool-white fluorescent light. The dotted lines denoted the pigment concentration at the beginning of inoculations. The
means and standard errors were based on triplicate incubations. Horizontal bars at different levels above the columns indicate significant (pb0.05) differences among the treatments.