Figure 2.
Freezing tolerance of chloroplasts in A. thaliana RLD, T8, and T9 plants. Leaves from nonacclimated (NA) and cold-acclimated (CA) plants were subjected to a freeze–thaw cycle to various subzero temperatures and damage to chloroplasts was assessed by determining Fv/Fm. (A) Nonacclimated (n = 6) and cold-acclimated (n = 2) RLD and T8 plants. (B) Nonacclimated (n = 4) RLD and T9 plants and cold-acclimated (n = 2) RLD plants. Each experiment (n) included at least three replicate samples per point.