Table 3 Steady-state photosynthetic-related traits in Panax notoginseng under different levels of nitrogen

A_max (μmol·m^− 2·s^− 1)

2.378 ± 0.261c

3.437 ± 0.241a

2.600 ± 0.165 b

CE (mol·mol⁻¹)

0.017 ± 0.002 ab

0.022 ± 0.003 a

0.018 ± 0.005 ab

Γ*(μmol·mol^− 1)

124.399 ± 8.014 a

99.259 ± 10.957 b

122.121 ± 21.084 ab

J_max (μmol·mol^− 1)

66.558 ± 6.123 b

74.518 ± 15.599 a

63.334 ± 23.251b

V_cmax (μmol·mol^− 1)

16.480 ± 1.821b

20.771 ± 2.939 a

16.830 ± 5.058 b

J_max/V_cmax

4.059 ± 0.127 ab

3.527 ± 0.337 b

4.329 ± 0.106 a

SLN (g m^− 2)

0.890 ± 0.130 c

1.245 ± 0.006 b

2.178 ± 0.348 a