Table 4.
Monoacylglycerol and free fatty acid profile (%) in the five studied green seaweed species
| Fatty acid | Monoacylglycerol class | Free fatty acid class | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| R. riparium | U. lactuca | U. prolifera | U. intestinalis | C. linum | R. riparium | U. lactuca | U. prolifera | U. intestinalis | C. linum | |
| 14:0 | 9.6 ± 0.4bC | 6.9 ± 1.6abA | 5.3 ± 0.2aA | n.d. | n.d. | 8.5 ± 0.0cB | 6.8 ± 0.2bA | n.d. | n.d. | 1.0 ± 0.0aB |
| 16:0 | 31.4 ± 1.2aC | 31.1 ± 6.6aB | 41.4 ± 1.8aC | n.d. | n.d. | 9.7 ± 0.0bA | 6.6 ± 0.1aA | n.d. | n.d. | 36.7 ± 0.0cB |
| 18:0 | 2.1 ± 0.1aB | 3.4 ± 0.8aB | 7.4 ± 0.1bB | n.d. | n.d. | 0.7 ± 0.0aA | 0.6 ± 0.0aA | n.d. | n.d. | 1.2 ± 0.0bA |
| Σ SFA | 54.4 ± 1.5aD | 50.8 ± 10.5aB | 57.7 ± 2.2aC | n.d. | n.d. | 23.0 ± 0.0aA | 24.4 ± 0.4aA | n.d. | n.d. | 44.0 ± 0.7bAB |
| 16:1 ω7 + ω9 | 4.9 ± 0.1bB | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 6.9 ± 0.0cD | 2.9 ± 0.0aC | n.d. | n.d. | 6.5 ± 0.0bB |
| 18:1 ω7 + ω9 | 5.1 ± 0.1bB | 1.0 ± 0.2aA | 2.9 ± 4.1aA | n.d. | n.d. | 21.1 ± 0.1bD | 17.0 ± 0.3aC | n.d. | n.d. | 30.6 ± 0.1cC |
| 20:1 ω7 + ω9 + ω11 | 0.0 ± 0.0aA | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 0.0 ± 0.0aA | 0.4 ± 0.0aC | n.d. | n.d. | 0.3 ± 0.2aA |
| Σ MUFA | 10.0 ± 0.3bB | 1.0 ± 0.2aA | 6.0 ± 2.1abA | n.d. | n.d. | 28.2 ± 0.0bD | 20.6 ± 0.0aC | n.d. | n.d. | 37.5 ± 0.0cB |
| 18:2 ω6 | 2.2 ± 0.1bA | 1.5 ± 0.2aA | 2.0 ± 0.1abA | n.d. | n.d. | 16.2 ± 0.1cD | 14.9 ± 0.3bC | n.d. | n.d. | 3.7 ± 0.0aC |
| 20:4 ω6 | 1.1 ± 0.0aB | 3.8 ± 0.8bB | 2.8 ± 0.2abB | n.d. | n.d. | 1.0 ± 0.0bA | 2.8 ± 0.1cB | n.d. | n.d. | 0.2 ± 0.0aB |
| 16:3 ω3 + 16:4 ω3 | 3.8 ± 0.0aB | 11.9 ± 2.8bA | 2.8 ± 0.1aA | n.d. | n.d. | 4.9 ± 0.0bC | 10.7 ± 0.1cA | n.d. | n.d. | 0.6 ± 0.0aB |
| 18:3 ω3 | 1.8 ± 0.1bA | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 13.8 ± 0.2cC | 0.3 ± 0.0aB | n.d. | n.d. | 5.0 ± 0.0bB |
| 18:4 ω3 | 0.8 ± 0.2bA | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 0.5 ± 0.0aA | 0.4 ± 0.0aC | n.d. | n.d. | 3.4 ± 0.3bB |
| 20:4 ω3 | 0.0 ± 0.0aA | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 0.1 ± 0.0aB | 0.2 ± 0.0bA | n.d. | n.d. | 0.2 ± 0.0bB |
| 20:5 ω3 | 3.2 ± 0.2aB | 7.4 ± 5.8aA | 2.8 ± 0.2aA | n.d. | n.d. | 3.0 ± 0.0bB | 3.3 ± 0.0cA | n.d. | n.d. | 0.0 ± 0.0aA |
| 22:5 ω3 | 0.8 ± 0.0aA | 2.4 ± 2.3aA | 0.0 ± 0.0aA | n.d. | n.d. | 0.7 ± 0.0aA | 1.8 ± 0.0bA | n.d. | n.d. | 0.6 ± 0.0aB |
| 22:6 ω3 | 0.5 ± 0.0bA | 0.0 ± 0.0aA | 0.0 ± 0.0aA | n.d. | n.d. | 0.3 ± 0.0aA | 0.4 ± 0.0aB | n.d. | n.d. | 0.0 ± 0.0aA |
| Σ PUFA | 15.6 ± 2.3aA | 31.0 ± 9.9aA | 13.9 ± 4.5aA | n.d. | n.d. | 41.9 ± 0.5cD | 36.8 ± 0.1bA | n.d. | n.d. | 14.2 ± 0.2aA |
| Σ ω3 | 11.3 ± 1.1abA | 21.7 ± 5.2bA | 5.6 ± 0.3aA | n.d. | n.d. | 23.6 ± 0.3cC | 17.0 ± 0.1bA | n.d. | n.d. | 9.9 ± 0.4aA |
| Σ ω6 | 3.7 ± 0.6aA | 9.3 ± 4.7aA | 8.4 ± 4.8aA | n.d. | n.d. | 17.5 ± 0.2bC | 19.0 ± 0.2cA | n.d. | n.d. | 4.1 ± 0.2aA |
| Σ ω3/Σ ω6 | 3.1 ± 0.2bB | 2.5 ± 0.7abA | 0.8 ± 0.5aA | n.d. | n.d. | 1.4 ± 0.0aA | 0.9 ± 0.0aA | n.d. | n.d. | 2.4 ± 0.2bA |
n.d., not determined.
Values are presented as average ± standard deviation. Different lowercase letters within a row for each lipid class correspond to statistical differences (p < .05). Different uppercase letters between different lipid classes for each seaweed species (in both Tables 3 and 4) correspond to statistical differences (p < .05).