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Table 3 Analysis of room temperature chlorophyll fluorescence during steady-state photosynthesis

From: A quadruple mutant of Arabidopsis reveals a β-carotene hydroxylation activity for LUT1/CYP97C1 and a regulatory role of xanthophylls on determination of the PSI/PSII ratio

  Fv/Fm ΦPSII
WT 0.81 ± 0.03a 0.17 ± 0.05a
lut2 0.80 ± 0.02a 0.12 ± 0.01a, b
chy1chy2lut5 0.68 ± 0.02b 0.07 ± 0.01c
chy1chy2lut2lut5 0.51 ± 0.10c 0.08 ± 0.05b, c
  1. Detached leaves of wild-type and mutant plants grown at 30 μmol photons m-2 s-1 for 6 weeks were given 20 min of illumination (1000 μmol photons m-2 s-1), then photosynthetic parameters were provided by analysis of RT chlorophyll fluorescence: maximum quantum yield of PSII (Fv/Fm) and efficiency of PSII photochemistry (ΦPSII). Data are expressed as mean ± SD (n = 4). Values marked with the same letters are not significantly different from each other within a column (P > 0.05).