Fig. 1
Effects of light intensity on the physical appearance of E. gracilis cells. a Algal cells and appearance of culture medium (insets) after cultivation for 7 days at 25 °C under continuous light at the indicated intensities. Scale bar, 20 μm. b and c Internal structure of cells grown under illumination at 55 (b) or 920 μmol m−2 s−1 (c) for 7 days. Scale bar, 5 μm. d and e Sections of chloroplasts of cells illuminated at 55 (d) or 920 μmol m−2 s−1 (e). Scale bar, 200 nm. C, chloroplast; CV, contractile vacuole; LG, lipid globule; N, nucleus; P, paramylon; PG, plastoglobule