Fig. 6

Genomic and transcriptomic features of glycerolipid biosynthesis in A. protothecoides. Heat map of differential expression of glycerolipid biosynthesis genes under low- and high-temperature stress conditions was constructed with HemI. The alterations of these genes at the transcript level were obtained according to our previous transcriptomic study [19]. End products are shown in bold. Genes encoding the enzymes are labeled in italic. Solid arrows indicate direct enzymatic steps, and dashed arrows represent multiple enzymatic steps. ^*1: TAG biosynthesis mediated by PES1 is drawn here in the plastid. But so far, the evidence for existence of this reaction is still lacking in green algae. ^*2: It remains unknown that whether the LCAT/PDAT is a TAG biosynthesis enzyme in A. protothecoides. The definitions of the abbreviations are shown in Additional file 2: Tables S3 and S5. LT low temperature, NT normal temperature, HT high temperature