Figure 6
From: Oogenesis and lipid metabolism in the deep-sea sponge Phakellia ventilabrum (Linnaeus, 1767)
Relationship between lipids and the area of sponge tissue occupied by oocytes for the different lipid categories. (A) free fatty acids (FFA); (B) lysophosphatidylcholines (LPC); (C) phosphatidylcholines (PC); (D) triacylglycerides (TGs); (E) sphingolipids; (F) oxylipins. The graph depicts the coefficient of the regression analysis between the logarithm of the signal of the lipids and the area of the sponge tissue occupied by oocytes (correcting by the location). Values of the regression coefficient above 0 mean upregulation of the lipid signal with the increasing tissue area occupied by oocytes. Similarly, values below 0 mean downregulation of the lipid signal with the increasing tissue area occupied by oocytes. The non-reproductive individuals are included in the analysis as those without oocyte, i.e. area of oocyte = 0. To distinguish major from minor species in the same family, the area of the circles is proportional to the signal of the lipid in the control group. The number next to the circles indicates the number of carbons of the lipid.
