Photosynthetic characteristics and chloroplast ultrastructure of welsh onion (Allium fistulosum L.) grown under different LED wavelengths

Table 2 Photosynthetic pigment content of Welsh onions under different light conditions

light quality	chlorophyll a (mg∙g^− 1)	chlorophyll b (mg∙g^− 1)	Carotenoid (mg∙g^− 1)	chlorophyll a + b (mg∙g^− 1)	chlorophyll a/b
W	0.61 ± 0.004a	0.27 ± 0.002a	0.20 ± 0.001a	0.88 ± 0.005a	2.23 ± 0.019b
B	0.54 ± 0.002b	0.23 ± 0.005b	0.17 ± 0.001b	0.77 ± 0.003b	2.34 ± 0.059a
G	0.44 ± 0.002d	0.20 ± 0.005d	0.15 ± 0.001d	0.65 ± 0.005d	2.16 ± 0.058c
Y	0.39 ± 0.004e	0.17 ± 0.004e	0.12 ± 0.001e	0.56 ± 0.003e	2.26 ± 0.067b
R	0.49 ± 0.001c	0.22 ± 0.002c	0.16 ± 0.001c	0.70 ± 0.003c	2.26 ± 0.024b

Values are means of 5 replicates ± SD. Different letters (a, b, c, d) in the same column indicate significant differences among treatments at P ≤ 0.05 according to Duncan’s new multiple range test. W white light, B blue light, G green light, Y yellow light, R red light. n = 5

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