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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