Table 2 Mineral composition of African wild lettuce leaves

Cu

0.01 ± 0.00^b

0.01 ± 0.00^a

0.01 ± 0.00^a

0.01 ± 0.00^a

Fe

0.47 ± 0.02^d

0.51 ± 0.02^b

0.63 ± 0.00^a

0.49 ± 0.03^c

Zn

0.06 ± 0.00^c

0.08 ± 0.01^a

0.06 ± 0.01^c

0.07 ± 0.01^b

Mn

1.35 ± 0.03^d

2.01 ± 0.02^a

1.92 ± 0.02^b

1.72 ± 0.02^c

K

8.93 ± 0.22^b

11.99 ± 0.32^c

13.09 ± 2.02^d

6.61 ± 0.12^a

Na

5.36 ± 0.11^b

7.56 ± 0.11^a

7.78 ± 0.02^a

4.04 ± 0.03^b

Mg

0.74 ± 0.03^d

2.54 ± 0.12^b

3.10 ± 0.11^a

1.86 ± 0.11^c

Ca

1.61 ± 0.04^c

6.15 ± 0.32^b

6.31 ± 0.03^a

1.22 ± 0.03^d

P

13.91 ± 0.02^b

10.60 ± 1.02^c

15.43 ± 3.23^a

9.27 ± 0.33^d

Ca/P

0.12 ± 0.11^a

0.58 ± 0.03^a

0.41 ± 0.02^a

0.13 ± 0.03^a

Na/K

0.6 ± 0.01^a

0.63 ± 0.02^a

0.59 ± 0.03^a

0.61 ± 0.01^a

Zn/Cu

6.0 ± 0.03^c

8.0 ± 1.16^a

6.0 ± 0.02^c

7.0 ± 0.02^b