Table 4 Photosynthetic-related pigment in a shade-tolerant plant Panax notoginseng grown under different levels of nitrogen, means ± SD were given (n = 7)

N (μg·cm⁻²)

0.362 ± 0.129 c

0.865 ± 0.265 b

1.643 ± 0.332 a

V (μg·cm^− 2)

0.913 ± 0.124 a

0.267 ± 0.195c

0.493 ± 0.458b

A (μg·cm^− 2)

0.213 ± 0.019 a

0.043 ± 0.072c

0.153 ± 0.079b

L (μg·cm^− 2)

1.284 ± 0.352 c

3.018 ± 0.970 b

5.852 ± 0.926a

Z (μg·cm^− 2)

0.194 ± 0.023 a

0.032 ± 0.048 c

0.073 ± 0.201b

Chl(g·cm^− 2)

12.270 ± 1.783 c

31.618 ± 2.356 b

60.101 ± 2.455 a

β-Car(g·cm^− 2)

4.08 ± 2.14 a

1.59 ± 0.69 c

2.95 ± 0.69 b

V + A + Z (g·cm^− 2)

1.314 ± 0.023 a

0.332 ± 0.035 c

0.712 ± 0.043 b

(A + Z)/(V + A + Z)

0.309 ± 0.015 ab

0.226 ± 0.017 b

0.317 ± 0.037 a

(V + A + Z)/Chl

0.107 ± 0.018 a

0.011 ± 0.027 b

0.012 ± 0.028 b