Table 5 Correlation coefficients (r) among the measured parameters

From: Effects of nitrogen stress on the photosynthetic CO2 assimilation, chlorophyll fluorescence and sugar-nitrogen ratio in corn

parameters

LDW

Fv/Fm

Ph

LNC

LSC

S/N

LDW

1

     

Fv/Fm

0.909**

1

    

Ph

0.704**

0.577**

1

   

LNC

0.698**

0.636**

0.671**

1

  

LSC

0.432*

0.618**

0.704**

0.552**

1

 

S/N

−0.546**

−0.798**

−0.714**

−0.886**

−0.408*

1

  1. Note: LDW, leaf dry weight; Fv/Fm, the maximum quantum yield of PSII; Ph, photosynthetic CO2 assimilation; LNC, leaf nitrogen concentration; LSC, leaf sugar concentration; S/N, the sugar-to-nitrogen concentration ratio.
  2. Probability levels are indicated by * and ** for 0.05 and 0.01, respectively.
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