Figure 8
From: Oogenesis and lipid metabolism in the deep-sea sponge Phakellia ventilabrum (Linnaeus, 1767)
Gene expression patterns of lipid metabolism in P. ventilabrum. (A) Heatmap of genes regulating the triacylglyceride (TG) biosynthetic pathway and lipoprotein formation. (B) Heatmap of genes regulating the fatty acid (FA) beta-oxidation, FA elongation and synthesis of unsaturated fatty acids (UFA). Relative expression level increases from blue to red. DE genes were overexpressed in females (either vitellogenic I, Vi_I, or vitellogenic II, Vi_II) compared to nonreproductive specimens. The red triangle represents genes that were overexpressed only in Vi_I female while the red square represents genes that were overexpressed only in Vi_II female. The asterisks show genes that were not overexpressed; however, they were found in the expression matrix and showed a higher expression tendency in females. (C) Pathways of triacylglyceride biosynthesis in endoplasmic reticulum (ER), lipoprotein synthesis, fatty acid (FA) beta-oxidation in mitochondria, and the molecular regulators that activate the FA beta-oxidation. The red arrows indicate the overexpression of those genes in female individuals, either or Vi_I or Vi_II or both stages.
