Effects of LED photoperiods and light qualities on in vitro growth and chlorophyll fluorescence of Cunninghamia lanceolata

Table 2 Effects of photoperiods and light qualities on chlorophyll content of C. lanceolata in vitro culture plantlets

Photoperiod/ h·d^− 1 (A)	Light quality^a (B)	Chlorophyll a content/mg·g^− 1 FW	Chlorophyll b content/mg·g^− 1 FW	Total chlorophyll content/mg·g^− 1 FW	Chlorophyll a/b
8	R/B	1.02 ± 0.07^b d^c	0.63 ± 0.04 d	1.65 ± 0.12 d	1.64 ± 0.01 d
	R/B/P	0.56 ± 0.03 f	0.40 ± 0.01 f	0.96 ± 0.04 g	1.41 ± 0.03 e
	R/B/P/G	1.43 ± 0.10 a	0.79 ± 0.04 a	2.22 ± 0.14 a	1.81 ± 0.04 ab
	W	0.64 ± 0.02 f	0.47 ± 0.01 e	1.11 ± 0.03 f	1.37 ± 0.01 e
16	R/B	1.30 ± 0.01 b	0.69 ± 0.05 bc	1.99 ± 0.04 b	1.87 ± 0.13 a
	R/B/P	1.17 ± 0.06 c	0.66 ± 0.03 cd	1.83 ± 0.08 c	1.77 ± 0.03 bc
	R/B/P/G	1.35 ± 0.07 ab	0.72 ± 0.02 cd	2.08 ± 0.09 b	1.86 ± 0.07 ab
	W	1.13 ± 0.04 c	0.64 ± 0.01 d	1.77 ± 0.05 cd	1.77 ± 0.02 bc
24	R/B	0.84 ± 0.07 e	0.50 ± 0.03 e	1.33 ± 0.10 e	1.69 ± 0.04 cd
	R/B/P	0.32 ± 0.01 g	0.22 ± 0.01 h	0.54 ± 0.01 h	1.43 ± 0.09 e
	R/B/P/G	0.29 ± 0.02 g	0.26 ± 0.01 g	0.55 ± 0.03 h	1.14 ± 0.03 f
	W	0.34 ± 0.02 g	0.28 ± 0.01 g	0.62 ± 0.03 h	1.20 ± 0.04 f
F-test	A	**	**	**	**
	B	**	**	**	**
	A × B	**	**	**	**

^a The light qualities are R/B (88.9% red+ 11.1% blue), R/B/P (80.0% red+ 10.0% blue+ 10.0% purple), R/B/P/G (72.7% red+ 9.1% blue+ 9.1% purple+ 9.1% green), W (12.7% red+ 3.9% blue+ 83.4% green)
^b mean ± standard deviation, n = 3
^c Any two means within a column not followed by the same letter are significantly different at P < 0.05 by ANOVA on Duncan’s multiple range test
^** mean significant at P < 0.01

ISSN: 1471-2229