Table 2 Growth lettuce affected by different light intensity × NSC.

From: Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Treatments

Leaf number

Weight (g per plant)

Light intensity (μmol · m−2s−1)

Nutrient solution concentration

Plant FW

Shoot FW

Plant DW

Shoot DW

150

1/4

14.33 ± 0.667ef

44.77 ± 2.832e

42.00 ± 2.397e

1.77 ± 0.088 f

1.53 ± 0.088 f

1/2

13.33 ± 0.333 f

54.57 ± 3.717de

51.57 ± 3.661de

2.40 ± 0.153e

2.17 ± 0.120d

3/4

16.00 ± 0.00bcde

59.03 ± 1.670d

55.63 ± 1.670d

2.33 ± 0.088e

2.13 ± 0.088d

250

1/4

15.33 ± 0.667cdef

73.70 ± 1.473bc

68.57 ± 1.671bc

3.13 ± 0.033d

2.90 ± 0.000c

1/2

14.67 ± 0.333def

65.37 ± 3.002 cd

61.83 ± 2.649 cd

3.37 ± 0.273d

2.93 ± 0.186c

3/4

17.33 ± 1.202abc

100.67 ± 2.293a

94.30 ± 2.381a

4.00 ± 0.265bc

3.63 ± 0.233ab

350

1/4

17.00 ± 0.577bc

79.40 ± 5.059b

73.63 ± 4.589b

3.53 ± 0.233 cd

3.13 ± 0.176c

1/2

19.33 ± 0.667a

84.30 ± 6.178b

77.30 ± 6.564b

4.10 ± 0.208ab

3.60 ± 0.208b

3/4

19.33 ± 0.333a

103.43 ± 4.853a

95.03 ± 4.133a

4.60 ± 0.100a

4.10 ± 0.058a

450

1/4

17.67 ± 0.667ab

75.73 ± 4.083bc

66.73 ± 4.326bc

4.13 ± 0.203ab

3.63 ± 0.203ab

1/2

17.67 ± 1.202ab

98.60 ± 1.054a

89.73 ± 0.203a

4.33 ± 0.033ab

3.90 ± 0.058ab

3/4

16.67 ± 0.333bcd

81.17 ± 2.674b

72.77 ± 2.088b

4.10 ± 0.153ab

3.60 ± 0.153b

ANOVA (F value)

Light intensity

20.299**

63.098**

52.256**

86.704**

89.529**

 

NSC

4.061*

24.697**

23.716**

13.202**

14.84**

 

Light intensity × NSC

2.973*

9.972**

9.471**

2.564*

3.513*

  1. FW = fresh weight, DW = dry weight. The results showed by mean ± standard error. Different letters mark in tables 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.
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