Expression of the ACT1 coding sequence complements the phenotype of S96. A, After 38 d at 2°C, wild-type (WT) and the S96 suppressor plants maintain high Fv/Fm, but fab1 and S96 plants expressing a wild-type ACT1
cDNA (S96/cACT1) suffer dramatic loss of Fv/Fm. Data are the means ± se for four replicates. B, After 79 d at 2°C, wild-type and S96 plants survived, but fab1 and S96/cACT1 plants had died. C, When returned to 22°C, only wild-type and S96 plants recovered.