Table II. α and P_max values of net photosynthesis rates as depicted in Figure 6, calculated with Sigmaplot.

LC, BG-11 with 0.5 mm NaHCO₃; HC, BG-11 with 50 mm NaHCO₃; orange, 625-nm light; far-red, 625-nm light with the addition of 25 µmol photons m⁻² s⁻¹ 730-nm light. α, Affinity for light; P_max, maximal rate of oxygen evolution. Sigmaplot was used for calculations.

Condition	α	±	Pmax	±	P
LC orange	0.0228	0.0008	2.66	0.049	<0.0001
LC far-red	0.0324	0.0012	3.75	0.078	<0.0001
HC orange	0.0300	0.0009	3.6	0.060	<0.0001
HC far-red	0.0308	0.0010	3.75	0.067	<0.0001