The fab1 phenotype is suppressed in fab1 gly1 and fab1 fad6 double mutants. A, Photosynthetic Fv/Fm of wild-type (WT), fab1, fab1 gly1, and fab1 fad6 plants were analyzed after 30 d at 2°C. Data are the means ± se for four replicates. B, Appearance of plants after 65 d at 2°C. C, The same plants transferred to 22°C for 1 week. Wild-type, fab1 gly1, and fab1 fad6 double mutants all recovered, but fab1 mutants died.