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Analyses of the sensitivity to photoxidative stress on WT and mutant genotypes. Whole plants (WT and different mutants) were exposed for 30 hours to a high photon flux density (1100 μmol m-2 s-1) at low temperature (10°C). (A) Measurements of the chlorophyll fluorescence ratio Fv/Fm, an index of photoinhibition of PSII. (B) Analyses of heat-induced luminescence emission of WT and mutant leaves; the 135°C emission band was used as an index of lipid peroxidation and oxidative stress.
