Table 2.

Effect of different blue–red light ratios in LED lighting on the micronutrients of mustard microgreens, mg g⁻¹ DW.

Treatment	Manganese	Iron	Zinc	Copper	Boron
B0R100	0.062 ± 0.000 bc	0.094 ± 0.002 d	0.078 ± 0.001 de	0.0099 ± 0.0004 d	0.029 ± 0.001 ab
B10R90	0.060 ± 0.001 c	0.114 ± 0.002 b	0.080 ± 0.000 d	0.0103 ± 0.0001 b	0.029 ± 0.002 ab
B25R75	0.065 ± 0.002 b	0.100 ± 0.002 cd	0.076 ± 0.001 e	0.0102 ± 0.0001 cd	0.025 ± 0.002 b
B50R50	0.068 ± 0.001 a	0.102 ± 0.001 c	0.089 ± 0.001 c	0.0112 ± 0.0002 c	0.034 ± 0.006 a
B75R25	0.070 ± 0.001 a	0.129 ± 0.003 a	0.097 ± 0.001 a	0.0122 ± 0.0002 a	0.026 ± 0.001 ab
B100R0	0.070 ± 0.002 a	0.126 ± 0.003 a	0.093 ± 0.003 b	0.0121 ± 0.0002 a	0.033 ± 0.001 a

B0R100, B10R90, B25R75 B50R50, B75R25, and B100R0: indicate the percentage of blue (B) and red (R) light; DW: dry weight. All values in the table are expressed as mean ± standard error (n = 3). Means with different letters are significantly different at the p < 0.05 level according to Tukey’s honestly significant difference test.