Figure 3

Representative confocal microscope images of the diatoms, showing oil bodies. Cells sampled during a 7-day culture cycle were stained with Nile Red and photographed under the confocal microscope daily. –N, cells subjected to the N deprivation treatment five days after subculture; Control, cells grown in f/2-Si medium and switched to fresh medium five days after subculture. Bar = 2 μm.