Table 1 Effect of different organic acids on the biomass productivity (BP, mg L⁻¹ day⁻¹) and the contents (% w/w) and productivities (mg L⁻¹ day⁻¹) of phycocyanin (PC), phycoerythrin (PE), and allophycocyanin (APC) as well as PC purity ratio (A₆₂₀/ A₂₈₀)

84.15 ± 6.00^a

16.92 ± 0.44^a

1.42 ± 0.152^a

0.88 ± 0.004^b

3.42 ± 0.27^b

0.29 ± 0.003^a

4.66 ± 0.26^d

0.39 ± 0.005^b

106.25 ± 0.80^c

24.55 ± 0.37 ^g

2.61 ± 0.059^e

0.84 ± 0.001^ab

4.58 ± 0.02 ^fg

0.49 ± 0.006^c

4.05 ± 0.02^bc

0.43 ± 0.005^c

156.54 ± 1.00^f

24.02 ± 0.01^f

3.76 ± 0.023 ^h

1.74 ± 0.004^f

4.10 ± 0.06^d

0.64 ± 0.014ⁱ

9.37 ± 0.05ⁱ

1.54 ± 0.018^j

164.19 ± 0.20 ^g

22.40 ± 0.32^d

3.68 ± 0.048 ^h

1.92 ± 0.004^gh

4.44 ± 0.04^ef

0.73 ± 0.007 ^k

3.38 ± 0.01^ij

0.33 ± 0.004 ^l

96.33 ± 0.001^b

19.30 ± 0.01^c

1.86 ± 0.001^b

1.36 ± 0.002^a

4.12 ± 0.01^d

0.40 ± 0.001^b

7.38 ± 0.03^a

0.99 ± 0.003^a

134.16 ± 0.60^e

24.11 ± 0.03 ^fg

3.23 ± 0.018^f

2.01 ± 0.001 ^h

6.24 ± 0.04^j

0.84 ± 0.009ⁿ

7.38 ± 0.04 ^g

0.99 ± 0.010 ^g

139.26 ± 1.40^e

22.98 ± 0.01^e

3.20 ± 0.032^f

1.59 ± 0.001^e

4.53 ± 0.01 fg

0.63 ± 0.005ⁱ

7.09 ± 0.06^f

0.99 ± 0.019 ^g

121.83 ± 2.00^d

18.96 ± 0.07^c

2.31 ± 0.047^d

1.03 ± 0.002^c

4.57 ± 0.01 fg

0.56 ± 0.009 ^fg

3.44 ± 0.01^a

0.42 ± 0.006^c

164.62 ± 0.40 ^g

25.45 ± 0.27 ^h

4.19 ± 0.035^j

1.86 ± 0.161 ^fg

4.27 ± 0.07^de

0.70 ± 0.009^j

9.58 ± 0.02^j

1.58 ± 0.001 ^m

164.05 ± 0.40 ^g

26.70 ± 0.01ⁱ

4.38 ± 0.010 ^k

2.20 ± 0.091ⁱ

4.74 ± 0.01^gi

0.78 ± 0.001 ^l

10.34 ± 0.00 ^k

1.70 ± 0.004ⁿ

123.53 ± 0.40^d

18.35 ± 0.04^b

2.27 ± 0.003^d

1.03 ± 0.001^c

4.57 ± 0.01 ^fg

0.56 ± 0.003^gh

4.23 ± 0.01^c

0.52 ± 0.003^e

171.56 ± 0.20 ^h

23.29 ± 0.12^e

3.99 ± 0.016ⁱ

2.26 ± 0.101ⁱ

3.13 ± 0.02^a

0.54 ± 0.003^e

8.77 ± 0.05 ^h

1.51 ± 0.016 ^k

165.04 ± 1.00 ^g

24.55 ± 0.07 ^g

4.05 ± 0.014ⁱ

1.32 ± 0.054^d

4.84 ± 0.01ⁱ

0.80 ± 0.006 ^m

7.43 ± 0.05 ^g

1.23 ± 0.016 ^h

122.68 ± 0.80^d

17.37 ± 0.02^a

2.13 ± 0.016^c

0.78 ± 0.011^ab

4.46 ± 0.01^ef

0.55 ± 0.003^ef

3.92 ± 4.61^b

0.48 ± 0.571^d

124.81 ± 0.20^d

26.58 ± 0.01ⁱ

3.32 ± 0.007^f

1.59 ± 0.022^e

4.60 ± 0.01 ^fg

0.57 ± 0.001 ^h

10.49 ± 0.04 ^k

1.31 ± 0.006ⁱ

134.58 ± 2.00^e

26.31 ± 0.05ⁱ

3.54 ± 0.046 ^g

3.06 ± 0.162^j

3.86 ± 0.01^c

0.52 ± 0.007^d

6.59 ± 0.01^e

0.89 ± 0.012^f