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Table 4 Kinetics of cadmium accumulation in parts of Cymodocea nodosa exposed to different concentrations of cadmium in water

From: Cadmium uptake kinetics in parts of the seagrass Cymodocea nodosa at high exposure concentrations

 

Exposure concentration (mg L−1)

5

10

20

Rhizomes

 α

5.512 (± 0.180)

  

 b

− 5.909 (± 0.346)

  

 r2

0.993**

  

Roots

 α

 

8.366 (± 0.148)a

8.980 (± 0.225)a

 b

 

− 9.745 (± 0.281)

− 10.313 (± 0.428)

 r2

 

0.998**

0.997**

  1. The exposure concentrations of 5, 10 and 20 mg L−1 correspond to 44.48, 88.95 and 177.94 μM, respectively
  2. The fits correspond to an S equation: lnC = α + [b/(t + 1)]
  3. C, tissue concentration (μg g−1 dry wt) reached in a given time; α and b constants; t, time (in days); standard errors are given in parentheses
  4. ** p < 0.01
  5. aOnly the initial four points were fitted