Fig. 9

Growth and the contents of lipid and starch in the wild-type strain, strain PK4 and AATPL1-knockout strains under the L/D 12:12 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 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 S6