Table 2.
Fatty acid proportions (%) of the different lipids in Asterionella formosa grown under different light acclimation (40 and 300 μmol photons m−2 s−1).
| Lipid Class | DGDG | MGDG | SQDG | NL | PG | PS | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Light | 40 | 300 | 40 | 300 | 40 | 300 | 40 | 300 | 40 | 300 | 40 | 300 |
| 16:0 | 14.7 (±1.8) | 16.3 (±2.0) | 14.6 (±0.1) | 17.3 (±5.9) | 45.1 (±2.7) | 50.7 (±0.9) | 25.1 (±7.7) | 23.5 (±1.7) | 25.9 (±0.7) | 28.1 (±2.8) | 25.6 (±2.4) | 26.4 (±4.6) |
| 16:1n-9 | 50.9 (±2.3) | 48.3 (±3.1) | 40.6 (±1.8) | 34.4 (±10.8) | 21.1 (±3.1) | 20.4 (±3.1) | 54.8 (±9.7) | 56.1 (±1.7) | 17.8 (±0.5) | 16.3 (±5.3) | 18.4 (±5.6) | 11.4 (±2.9) |
| 16:3n-3 | 4.4 (±0.6) | 3.2 (±0.8) | 10.9 (±0.5) | 9.2 (±3.2) | 0.8 (±0.3) | 0.4 (±0.3) | 1.5 (±1.1) | 0.7 (±0.2) | 1.5 (±0.2) | 1.4 (±0.2) | n.d. | n.d. |
| 16:4n-3 | n.d. | n.d. | 0.5 (±0.1) | 0.6 (±0.2) | n.d. | n.d. | 0.5 (±0.3) | 0.7 (±0.2) | 2.3 (±0.5) | 1.9 (±0.7) | n.d. | n.d. |
| 18:0 | 3.5 (±0.8) | 4.6 (±1.8) | 2.5 (±1.8) | 5.9 (±7.2) | 6.9 (±4.2) | 2.7 (±0.9) | 2.5 (±1.8) | 2.3 (±0.8) | 4.9 (±0.6) | 6.3 (±1.7) | 6.9 (±1.7) | 10.8 (±0.5) |
| 18:1n-7 | 1.1 (±1.0) | 1.9 (±0.2) | 5.1 (±0.2) | 4.0 (±0.4) | 3.2 (±0.4) | 2.7 (±0.2) | 1.2 (±0.4) | 1.6 (±0.3) | 17.7 (±0.9) | 17.4 (±4.2) | 3.7 (±0.8) | 3.8 (±0.4) |
| 18:1n-9 | 1.9 (±0.3) | 2.6 (±0.5) | 2.6 (±0.4) | 4.4 (±2.5) | 2.1 (±0.7) | 1.9 (±0.8) | 1.4 (±0.2) | 1.2 (±0.1) | 16.8 (±2.2) | 15.7 (±7.7) | 5.2 (±1.6) | 6.4 (±0.3) |
| 18:2n-6 | 1.6 (±0.3) | 1.8 (±0.2) | 1.5 (±0.2) | 3 (±2.5) | 1.3 (±0.2) | 1.3 (±0.1) | 1.8 (±0) | 1.2 (±0.2) | 1.9 (±0.2) | 1.8 (±0.2) | 3.8 (±0.8) | 4.5 (±0.2) |
| 18:3n-6 | n.d. | n.d. | 0.8 (±0.3) | 1.5 (±1.1) | n.d. | n.d. | 1.1 (±0.2) | 1.0 (±0.2) | 1.1 (±0.1) | 1.2 (±0.3) | n.d. | n.d. |
| 18:3n-3 | 1.0 (±0) | 1.3 (±0.1) | 1.0 (±0.5) | 1.0 (±0.3) | 0.7 (±0.6) | 0.7 (±0.1) | 0.6 (±0.1) | 0.4 (±0.4) | 1.0 (±0.2) | 1.1 (±0.1) | 2.4 (±0.5) | 3.7 (±1.0) |
| 18:4n-3 | 0.9 (±0.1) | 1.5 (±0.7) | 0.7 (±0.2) | 0.4 (±0.4) | n.d. | n.d. | 0.6 (±0.1) | 0.7 (±0.1) | n.d. | n.d. | n.d. | n.d. |
| 20:0 | 1.6 (±0.4) | 2.1 (±0.4) | 0.6 (±0) | 1.0 (±0.4) | 1.9 (±0.2) | 1.9 (±0.2) | 0.9 (±0.7) | 0.6 (±0.1) | 1.6 (±0.1) | 1.9 (±0.5) | 4.1 (±0.7) | 5.2 (±0.4) |
| 20:3n-6 | 1.4 (±0.5) | 2.5 (±1.8) | 0.4 (±0) | 0.6 (±0.3) | 0.6 (±0.1) | 1.1 (±0.7) | 1.0 (±1.2) | 0.3 (±0.1) | 1.3 (±0.3) | 1.2 (±0.3) | 2.7 (±0.7) | 3.9 (±0.8) |
| 20:4n-6 | 1.8 (±0.3) | 1.7 (±0.1) | 1.8 (±0.2) | 2.3 (±1.1) | 3.4 (±0.3) | 3.3 (±0.6) | 0.8 (±0.2) | 1.0 (±0.1) | 1.3 (±0.1) | 1.4 (±0.3) | n.d. | n.d. |
| 20:5n-3 | 15.1 (±3.7) | 12.2 (±1.6) | 15.2 (±1.1) | 12.3 (±3.5) | 4.2 (±0.5) | 4.3 (±0.7) | 4.1 (±2.9) | 6.3 (±0.8) | 5.0 (±0.3) | 4.4 (±1.4) | 3.2 (±0.4) | 3.5 (±0.3) |
| 22:0 | n.d. | n.d. | n.d. | n.d. | 1.4 (±0) | 1.6 (±0.2) | 0.5 (±0.2) | 0.4 (±0.1) | n.d. | n.d. | 4.0 (±0.6) | 5.0 (±0.2) |
| 22:6n-3 | n.d. | n.d. | 0.6 (±0.3) | 1.3 (±1.1) | n.d. | n.d. | 0.6 (±0.1) | 0.5 (±0.1) | n.d. | n.d. | n.d. | n.d. |
| 24:0 | n.d. | n.d. | 0.5 (±0.1) | 0.9 (±0.5) | 7.3 (±0.9) | 6.9 (±1.5) | 1.0 (±0.2) | 1.5 (±0.2) | n.d. | n.d. | 19.9 (±3.1) | 15.5 (±7.8) |
Data shown are means and standard deviations (n = 3). PC, PE, and PI were not detected (n.d.). Numbers in bold/red font indicate statistically significant differences of fatty acid proportions between the two light conditions (ANOVA; p < 0.05). Numbers in bold/blue font indicate statistically significant differences after sequential Bonferroni correction with an effective alpha of 5%. DGDG, digalactosyldiacylglycerol; MGDG, monogalactosyldiacylglycerol; SQDG, sulfoquinovosyldiacylglycerol; NL, non-polar lipid (triacylglycerols); PC, phosphatidylcholine; PE, phosphatidylethanolamine; PG, phosphatidylglycerol; PI, phosphatidylinositol; PS, phosphatidylserine; n.d. = not detected.