Table 2 Am/Ap ratio, and Am or Ap content (%DW) of P. helgolandica cultures under different cultivation modes (mean ± SD, n = 3)

1.60 ± 0.06^d

1.12 ± 0.04^c

0.85 ± 0.13^d

1.02 ± 0.23^b

1.03 ± 0.04^c

5.82 ± 0.22^a

5.13 ± 0.79^c

5.64 ± 0.45^e

5.60 ± 0.33^e

9.53 ± 0.05^e

3.67 ± 0.27^a

4.57 ± 0.53^d

6.72 ± 0.57^d

5.74 ± 1.24^e

9.25 ± 0.35^e

1.70 ± 0.07^d

1.08 ± 0.20^c

1.05 ± 0.02^c

0.78 ± 0.021^b

1.07 ± 0.03^c

1.94 ± 0.02^e

3.48 ± 0.19^d

8.07 ± 0.38^d

10.24 ± 0.42^d

14.44 ± 1.09^d

1.14 ± 0.03^c

3.29 ± 0.43^e

7.72 ± 0.50^d

13.14 ± 0.30^d

13.85 ± 0.48^d

2.01 ± 0.06^c

3.23 ± 0.04^a

2.16 ± 0.11^a

1.97 ± 0.17^a

1.54 ± 0.12^b

2.91 ± 0.04^c

17.54 ± 0.43^a

25.70 ± 0.45^b

20.53 ± 0.96^c

26.72 ± 1.28^c

1.45 ± 0.06^b

5.43 ± 0.19^d

11.95 ± 0.77^c

10.50 ± 0.85^d

17.43 ± 1.72^c

2.30 ± 0.01^b

2.16 ± 0.15^b

2.20 ± 0.12^a

1.95 ± 0.10^a

1.68 ± 0.05^b

2.49 ± 0.07^d

14.93 ± 1.02^b

24.20 ± 0.88^b

23.89 ± 0.77^b

30.77 ± 0.09^b

1.08 ± 0.04^c

6.98 ± 0.95^c

11.00 ± 0.30^c

12.27 ± 0.53^c

18.28 ± 0.57^c

3.14 ± 0.24^a

1.27 ± 0.03^c

1.54 ± 0.02^b

1.72 ± 0.03^a

1.87 ± 0.06^a

1.60 ± 0.04^f

18.32 ± 0.68^a

27.74 ± 0.50^a

32.49 ± 0.93^a

39.79 ± 1.77^a

0.51 ± 0.02^d

14.42 ± 0.53^b

18.04 ± 0.42^b

18.93 ± 0.39^b

21.30 ± 0.95^b

1.31 ± 0.01^e

0.85 ± 0.03^d

0.83 ± 0.05^d

1.01 ± 0.03^b

1.03 ± 0.05^c

3.63 ± 0.05^b

14.41 ± 0.72^b

18.51 ± 1.18^c

29.03 ± 0.29^b

31.27 ± 0.36^b

2.77 ± 0.06^e

16.97 ± 0.21^a

22.36 ± 0.81^a

28.71 ± 0.81^a

30.54 ± 1.22^a