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. 2021 Mar 8;22(5):2736. doi: 10.3390/ijms22052736

Table 1.

Photosynthetic parameters: the maximum quantum yield of photosystem II (PSII) in the dark-adapted state (Fv/Fm), steady-state quantum yield (QY_Lss) and non-photochemical quenching (NPQ_Lss) of PSII. Selected genotypes were exposed to standard (S), low light (L), cold (C) and combined cold and low light (CL) conditions for 6 h or 7 d. Means ± SD of six independent developed leaves are presented. WT, wild type. Between-treatment and between-genotype differences were evaluated by one-way ANOVA with Tukey’s test (p < 0.05, n = 6)—see Table S1.

S L C CL
Fv/Fm 6 h WT 0.838 ± 0.007 0.853 ± 0.004 0.783 ± 0.005 0.847 ± 0.005
cry1 0.822 ± 0.019 0.844 ± 0.007 0.802 ± 0.012 0.847 ± 0.007
cry2 0.835 ± 0.008 0.850 ± 0.001 0.810 ± 0.008 0.850 ± 0.006
phyA 0.835 ± 0.005 0.856 ± 0.006 0.821 ± 0.016 0.850 ± 0.006
phyB 0.837 ± 0.011 0.859 ± 0.003 0.827 ± 0.005 0.852 ± 0.009
7 d WT 0.846 ± 0.005 0.799 ± 0.014 0.810 ± 0.001 0.848 ± 0.004
cry1 0.840 ± 0.005 0.809 ± 0.014 0.797 ± 0.005 0.858 ± 0.004
cry2 0.849 ± 0.003 0.800 ± 0.007 0.817 ± 0.005 0.852 ± 0.004
phyA 0.841 ± 0.010 0.802 ± 0.009 0.809 ± 0.015 0.850 ± 0.006
phyB 0.851 ± 0.003 0.828 ± 0.009 0.814 ± 0.007 0.856 ± 0.005
QY_Lss 6 h WT 0.540 ± 0.027 0.544 ± 0.024 0.547 ± 0.017 0.555 ± 0.050
cry1 0.517 ± 0.019 0.523 ± 0.032 0.554 ± 0.014 0.597 ± 0.007
cry2 0.543 ± 0.022 0.548 ± 0.013 0.573 ± 0.014 0.610 ± 0.001
phyA 0.575 ± 0.017 0.565 ± 0.015 0.583 ± 0.023 0.612 ± 0.007
phyB 0.512 ± 0.033 0.561 ± 0.041 0.577 ± 0.012 0.652 ± 0.057
7 d WT 0.576 ± 0.017 0.405 ± 0.023 0.520 ± 0.008 0.633 ± 0.005
cry1 0.544 ± 0.010 0.381 ± 0.021 0.530 ± 0.008 0.637 ± 0.005
cry2 0.558 ± 0.016 0.424 ± 0.052 0.537 ± 0.033 0.642 ± 0.007
phyA 0.577 ± 0.024 0.482 ± 0.013 0.573 ± 0.022 0.630 ± 0.001
phyB 0.589 ± 0.020 0.498 ± 0.035 0.526 ± 0.026 0.610 ± 0.028
NPQ_Lss 6 h WT 1.093 ± 0.071 1.118 ± 0.090 0.310 ± 0.028 0.807 ± 0.112
cry1 0.950 ± 0.114 1.007 ± 0.120 0.528 ± 0.028 0.619 ± 0.051
cry2 0.955 ± 0.101 1.020 ± 0.060 0.477 ± 0.038 0.630 ± 0.050
phyA 0.882 ± 0.070 1.040 ± 0.102 0.575 ± 0.118 0.653 ± 0.023
phyB 1.118 ± 0.117 1.120 ± 0.128 0.743 ± 0.057 0.618 ± 0.153
7 d WT 1.002 ± 0.056 1.298 ± 0.106 0.697 ± 0.039 0.687 ± 0.039
cry1 1.173 ± 0.144 1.417 ± 0.114 0.547 ± 0.069 0.663 ± 0.039
cry2 1.036 ± 0.094 1.196 ± 0.196 0.684 ± 0.113 0.660 ± 0.026
phyA 0.916 ± 0.139 0.880 ± 0.240 0.653 ± 0.078 0.777 ± 0.086
phyB 0.967 ± 0.090 0.957 ± 0.158 0.641 ± 0.069 0.784 ± 0.102