Heat-induced changes of lipids in wild-type and pdat1-2 seedlings. TAGs (A), DAGs (B), and PCs (C) were determined in 2-week-old seedlings kept at 22°C (white bars) or after a heat shock (45°C for 90 min, black bars). Data represent means ± sd, n = 4. The heat maps display the fold changes of lipid species (characterized by their headgroup; total number of acyl carbons:total number of double bonds) after the heat shock compared to control seedlings at 22°C. Statistical significant changes of lipid levels (P < 0.05) are indicated by bold numbers. FW, Fresh weight.