Fig. 3.

Fig. 3. Stress factors that induce lipid production in Chlorella strains. (A) Diagram of the stress factors that induce lipid production in Chlorella strains. (B) Microscopy images of the Nile Red-stained cells grown in TAP medium with nitrogen (+N) or without nitrogen (-N) for 72 h. Brightfield, Nile Red (lipid droplets), autofluorescence, and merged images with Nile Red and chlorophyll autofluorescence are shown. Scale bars, 10 μm.

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