Table 3.

Photosynthetic pigment level affected by light intensity × NSC.

Treatments		Photosynthetic pigment content (mg/g)				Chlorophyll a/b
Light intensity (μmol · m−2 · s−1)	Nutrient solution concentration	Chlorophyll a	Chlorophyll b	Total Chlorophyll	Carotenoid
150	1/4	0.38 ± 0.022abc	0.138 ± 0.0088a	0.525 ± 0.0308a	0.087 ± 0.0087bc	2.76 ± 0.048e
	1/2	0.38 ± 0.022abc	0.130 ± 0.0070ab	0.512 ± 0.0295a	0.085 ± 0.0060bc	2.91 ± 0.020e
	3/4	0.36 ± 0.016bcd	0.127 ± 0.0136ab	0.497 ± 0.0163a	0.079 ± 0.0054c	2.94 ± 0.391e
250	1/4	0.39 ± 0.014abc	0.113 ± 0.0081b	0.507 ± 0.0149a	0.105 ± 0.0055abc	3.46 ± 0.277e
	1/2	0.32 ± 0.010de	0.082 ± 0.0029c	0.405 ± 0.0124bc	0.081 ± 0.0038c	3.87 ± 0.092e
	3/4	0.40 ± 0.012ab	0.129 ± 0.0037ab	0.537 ± 0.0153a	0.097 ± 0.0034abc	3.11 ± 0.018e
350	1/4	0.34 ± 0.027 cd	0.086 ± 0.0048c	0.434 ± 0.0318b	0.089 ± 0.0081abc	3.95 ± 0.086e
	1/2	0.41 ± 0.005a	0.079 ± 0.0053c	0.499 ± 0.0076a	0.116 ± 0.0012a	5.28 ± 0.386de
	3/4	0.28 ± 0.006ef	0.006 ± 0.0004e	0.294 ± 0.0066d	0.084 ± 0.0086bc	50.44 ± 2.205a
450	1/4	0.35 ± 0.005 cd	0.010 ± 0.0005e	0.368 ± 0.0057c	0.110 ± 0.0124ab	36.95 ± 1.714b
	1/2	0.25 ± 0.001 f	0.016 ± 0.0003e	0.268 ± 0.0010d	0.090 ± 0.0008abc	15.26 ± 0.241c
	3/4	0.35 ± 0.008 cd	0.051 ± 0.0011d	0.410 ± 0.0088bc	0.099 ± 0.0187abc	6.87 ± 0.048d
ANOVA (F value)	Light intensity	9.358**	184.564**	49.715**	2.112	401.694**
	NSC	3.616*	3.127	4.459*	0.946	118.356**
	Light intensity × NSC	14.9**	26.497**	20.264**	2.383	416.712**

The results showed by mean ± standard error. Different letters mark in all figures indicated significant difference (P ≤ 0.05, Tukey’s test). * and ** represented the significant difference at p ≤ 0.05 and p ≤ 0.01, respectively. Significant differences among the treatments were determined by SPSS 17.0 for ANOVA.