difference was apparentp<0.01
While the amount of chlorophyll- a (pg.cell -1 ) did not change during the 15 days of culturing in the control condition (R 2 = 0.0103), in 8 mM Ca 2+ cells accumulated more chlorophyll- a than in control (R 2 = 0.7264 ), and this difference was apparent from the 3 rd day of culturing (KW-test, p<0.01) ( Fig. 3 ).