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Table 5 Effects of LED supplementation on chlorophyll fluorescence parameters of pepper

From: Effects of light-emitting diode supplementary lighting on the winter growth of greenhouse plants in the Yangtze River Delta of China

Lighting strategy Y(II) ETR qL NPQ Fv/Fm
LED-A1 0.312 ± 0.090a 11.81 ± 3.51a 0.321 ± 0.130a 1.419 ± 0.256d 0.831 ± 0.014a
LED-B1 0.259 ± 0.065b 9.89 ± 2.59b 0.216 ± 0.085b 1.605 ± 0.210ab 0.820 ± 0.013cd
LED-A2 0.201 ± 0.066c 7.02 ± 2.96c 0.131 ± 0.072c 1.570 ± 0.249bc 0.829 ± 0.015a
LED-B2 0.176 ± 0.049c 7.40 ± 1.50c 0.135 ± 0.039c 1.700 ± 0.187a 0.827 ± 0.011ab
LED-A3 0.178 ± 0.073c 6.76 ± 2.81c 0.126 ± 0.073c 1.622 ± 0.183ab 0.821 ± 0.019bc
LED-B3 0.146 ± 0.053d 5.65 ± 1.93d 0.104 ± 0.047c 1.439 ± 0.270d 0.818 ± 0.012cd
Control group 0.146 ± 0.059d 5.51 ± 2.24d 0.103 ± 0.063c 1.479 ± 0.286cd 0.815 ± 0.012d
  1. Data are the mean ± SD of each group; Different letters in same column indicate a significant difference at p < 0.05