Fig. 5: Acyl chain double bonds and carbon atoms in the identified clusters.

Total average number of acyl carbon atoms and acyl unsaturations in chloroplast lipids (a, d), cell membrane lipids (b, e) and triacylglycerols (c, f) across the five clusters shown in Fig. 2. Boxes represent the interquartile ranges, the line within the box the median, and the whiskers extend to the minimum and maximum values within 1.5 times the interquartile range. Outliers are shown as circles. The chloroplast lipids include the glycolipids with diacylglycerol side chain (the galactolipids mono- and digalactosyldiacylglycerol and the sulfolipid sulfoquinovosyldiacylglycerol). The cell membrane lipids include all detected phospho- and betaine lipids. Asterisks indicate variables significantly different (one-way ANOVA, p < 0.05) from coastal (dark blue) and open-ocean (light blue) stations, respectively.