Table 1.

Productivity parameters for cells at exponential (24 h) and stationary (120 h) phases of growth^a

Parameter	Result at time point for strain
	24 h			120 h
	WT	CB	CK	WT	CB	CK
Respiration (R; μmol O2/ml/h)	0.087 ± 0.006	0.075 ± 0.005	0.088 ± 0.007	0.158 ± 0.004	0.155 ± 0.002	0.142 ± 0.007
Photosynthetic O2 evolution (P; μmol O2/ml/h)	0.808 ± 0.210	0.562 ± 0.117	0.448 ± 0.054	0.699 ± 0.101	0.588 ± 0.092	0.633 ± 0.156
Saturated photosynthetic O2 evolution (Psat; μmol O2/ml/h)	2.284 ± 0.198	1.155 ± 0.194	1.497 ± 0.143	2.436 ± 0.110	1.782 ± 0.252	1.570 ± 0.242
Cell concn (10−8 cells/ml)	3.62 ± 0.589	3.37 ± 0.185	1.82 ± 0.21	12.90 ± 1.52	13.03 ± 2.64	9.85 ± 1.18
Biomass concn (mg/ml)	4.70 ± 0.092	4.63 ± 0.069	4.63 ± 0.09	5.80 ± 0.10	5.52 ± 0.09	5.36 ± 0.03
Chlorophyll concn (μg/ml)	7.60 ± 0.918	4.97 ± 0.687	4.37 ± 1.04	32.06 ± 5.79	22.32 ± 1.71	16.42 ± 1.32
Phycobilin concn (μg/ml)	59.43 ± 7.72	19.92 ± 3.37	5.84 ± 1.65	210.91 ± 37.50	92.98 ± 11.92	18.98 ± 3.13

^aCultures were grown with 5% CO₂ bubbling at 350 ml per minute, 100 μmol photons m⁻² s⁻¹ blue light and 50 μmol photons m⁻² s⁻¹ red light, and 30°C. Means ± standard errors of three biological replicates are reported.