. 2018 May 3;8:6972. doi: 10.1038/s41598-018-25417-5

Table 1.

Effect of bicarbonate on photosynthetic pigments of D. salina under nutrient deficit conditions.

Treatments	Chl-a (µg/mL)	Chl-b (µg/mL)	Chl a + b (µg/mL)	Car (µg/mL)	Chl a/b	Car/Chl a + b
TN	1.56 ± 0.05^a	1.29 ± 0.06^a	2.85 ± 0.01^a	4.62 ± 0.02^f	1.21 ± 0.08^d	1.62 ± 0.11^f
N⁻	0.52 ± 0.01^d	0.21 ± 0.01^e	0.73 ± 0.03^e	7.23 ± 0.08^b	2.48 ± 0.01^a	9.9 ± 0.02^a
N⁻ + NaHCO₃	1.02 ± 0.12^bc	0.47 ± 0.04^d	1.49 ± 0.09^d	8.25 ± 0.01^a	2.17 ± 0.06^b	5.54 ± 0.09^c
P⁻	0.55 ± 0.03^d	0.22 ± 0.02^e	0.77 ± 0.02^e	5.43 ± 0.01^d	2.50 ± 0.01^a	7.05 ± 0.01^b
P⁻ + NaHCO₃	0.98 ± 0.05^c	0.52 ± 0.05^d	1.51 ± 0.05^d	5.97 ± 0.01^c	1.93 ± 0.01^c	3.95 ± 0.05^d
S⁻	1.32 ± 0.02^ab	0.76 ± 0.02^c	2.08 ± 0.04^c	5.02 ± 0.02^e	1.74 ± 0.02^c	2.41 ± 0.01^e
S⁻ + NaHCO₃	1.41 ± 0.09^a	1.01 ± 0.03^b	2.42 ± 0.13^b	5.62 ± 0.10^d	1.41 ± 0.06^d	2.32 ± 0.01^e

All values are expressed as Mean ± SD (n = 3). Values with different letters represent significantly differ at p < 0.05 between the groups. Total Nutrient (TN); Nitrate deficit (N⁻); Nitrate deficit with bicarbonate (N⁻ + NaHCO₃); Phosphate deficit (P⁻); Phosphate deficit with bicarbonate (P− + NaHCO₃); Sulphate deficit (S⁻); Sulphate deficit with bicarbonate (S⁻ + NaHCO₃). Chlorophyll a (Chl-a); Chlorophyll b (Chl-b); Chlorophyll a + b (Chl a + b); Carotenoid (Car); Chlorophyll a/b (Chl a/b); Carotenoid/Chlorophyll a + b (Car/Chl a + b).