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Table 3 Effects of salinity on growth and TAG content of two diatoms, C. gracilis and P. tricornutum

From: Advantageous characteristics of the diatom Chaetoceros gracilis as a sustainable biofuel producer

  Concentration of NaCl (%)
0 0.5 1 2 3 4
C. gracilis
 Doubling time (h) 11.1 ± 0.5 9.52 ± 0.48 9.16 ± 0.17 9.75 ± 0.20 11.3 ± 1.5 15.7 ± 0.4
 Cell density on 4th day (106 cells/mL) 2.41 ± 0.19 4.41 ± 0.67 5.32 ± 0.14 5.24 ± 0.26 3.64 ± 0.80 2.24 ± 0.81
 Cell density on 10th day (106 cells/mL)a 3.89 ± 0.45 5.30 ± 0.15 6.29 ± 0.31 6.47 ± 0.43 3.63 ± 0.32 2.71 ± 0.23
 Volume-specific TAG on 10th day (mg/L) 223 ± 18 234 ± 43 272 ± 4 223 ± 6 172 ± 3 69.3 ± 28.6
 Cell-specific TAG on 10th day (pg/cell)a 73.1 ± 7.3 46.2 ± 4.9 47.0 ± 2.5 35.5 ± 3.9 25.5 ± 0.6 19.3 ± 5.0
P. tricornutum
 Doubling time (h) n.d. n.d. 14.6 ± 0.2 15.8 ± 0.4 15.4 ± 0.7 19.0 ± 0.9
 Cell density on 4th day (106 cells/mL) n.d. n.d. 14.9 ± 0.4 15.4 ± 0.2 13.2 ± 0.6 11.6 ± 0.3
 Cell density on 10th day (106 cells/mL) n.d. n.d. 16.4 ± 1.0 16.6 ± 9.2 14.9 ± 0.1 13.8 ± 0.6
 Volume-specific TAG on 10th day (mg/L) n.d. n.d. 183 ± 11 180 ± 9 158 ± 14 161 ± 15
 Cell-specific TAG on 10th day (pg/cell) n.d. n.d. 11.2 ± 0.4 10.9 ± 1.1 10.6 ± 0.8 11.7 ± 0.6
  1. Cells cultivated in media containing various NaCl concentrations; media enriched with F/2 without vitamins and MgSO4, CaCl2, KCl, and NaHCO3 added, as described in “Methods” section
  2. n.d. not determined; n = 3–4
  3. a n = 2