Fig. 8

Growth and the contents of lipid and starch in the wild-type strain, strain PK4, and AATPL1-knockout strains under the L/D 16:8 cycle. a Volumetric biomass yield [cell mass dry weight per liter of culture (g l⁻¹)]. b Lipid content in percentage of dry weight biomass (w/w). c Volumetric lipid yield (g l⁻¹). d Starch content in percentage of dry weight biomass (w/w). Bars represent standard deviations of the data from three independent samples. Statistical significance of differences between the values of strain PK4 and those of other strains or between the values of the wild-type strain and those of other strains were tested by Student’s t test (two-tailed), and the results are shown in Additional file 7: Table S5