Figure 8.

SFR2 activation in 3-week-old tomato plants subjected to salt or drought stress. A, Lipids were extracted from the second and fourth leaves of untreated wild-type (WT) and SlSFR2-RNAi plants (L2, L9) and analyzed by TLC. B, Lipids were extracted from the second leaves and (C) from the fourth leaves of salt- and drought-treated plants as indicated. Lipids were stained for sugar head groups. Extracts of MgCl₂-treated WT leaves (MgCl₂; SFR2 induced) were included (A and C) to detect the diagnostic TGDG following SFR2 induction. SQDG, Sulfoquinovosyldiacylglycerol. A representative result is shown.