Table 5.
Double bond index (DBI) of membrane lipids in F. vesiculosus collected in February and in May. The relative change (RC) in DBI from winter (February) to spring (May) calculated as RC = ((DBIFebruary − DBIMay)/DBIFebruary) × 100. The FA double bond index was calculated as DBI = Σ (weight % of the fatty acids × N)/100 and for the lipid class was calculated as DBI = Σ (relative percentage of lipids × N)/100, being N = number of double bonds of each FA. The relative percentage of means were calculated considering classes with more than three species.
| Lipid Class | DBI | ||
|---|---|---|---|
| Winter | Spring | RC (%) | |
| MGDG | 6.90 | 5.89 | 15% |
| MGMG | 2.75 | 2.75 | 0.0% |
| DGDG | 5.70 | 5.36 | 6.3% |
| DGMG | 2.57 | 2.12 | 18% |
| SQDG | 1.33 | 1.00 | 25% |
| SQMG | 1.35 | 1.10 | 19% |
| PI | 2.07 | 1.47 | 29% |
| PC | 3.32 | 2.70 | 19% |
| PG | 2.74 | 2.27 | 17% |
| PE | 7.20 | 4.80 | 33% |
| DGTS | 1.94 | 1.77 | 9.0% |
| MGTS | 1.67 | 1.49 | 11% |
| DGTA | 1.89 | 1.54 | 19% |
| MGTA | 2.05 | 1.79 | 13% |
| Fatty acids | 1.66 | 1.53 | 7.8% |