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Table 2 Photosynthetic parameter of maize seedlings

From: Adaptation of maize source leaf metabolism to stress related disturbances in carbon, nitrogen and phosphorus balance

   Low temperature Low nitrogen Low phosphorus
PS parameter Unit Control T Cold % Control N Low N % Control P Low P %
assimilation μmol m-2 s-1 8.00 8.92 111.51 8.11 5.46 67.33 8.11 4.06 49.98
   (±1.29) (±1.20)   (±1.07) (±1.41)   (±1.07) (±1.39)  
conductance mmol m-2 s-1 74.71 90.25 120.79 47.19 32.58 69.04 47.19 47.19 99.99
   (±10.11) (±16.54)   (±7.68) (±7.74)   (±7.68) (±6.49)  
Ci ppm 161.59 167.24 103.49 154.57 166.47 107.70 154.57 283.11 183.16
   (±12.00) (±43.79)   (±19.14) (±17.40)   (±19.14) (±22.75)  
PSII efficiency   0.187 0.224 119.75 0.312 0.269 86.32 0.312 0.139 44.56
   (±0.028) (±0.046)   (±0.028) (±0.014)   (±0.028) (±0.030)  
  1. Gas exchange and fluorescence measurements were performed on leaf 4 at day 20 after germination in the cold stress experiment, and on leaf 6 at days 28–30 after germination in the nutrient experiments. Photosynthesis measurements for nutrient deficient leaves were performed on plants which were cultivated in the greenhouse at the same time and the data for control N and P was therefore the same.