Table 2 Optimum CO₂ concentrations, \({{\rm{CO}}}_{2}{\rm{K}}\tfrac{1}{2}\) concentrations and maximum rates (V_max) of S. apsteinii from fit equation (2) at 50–515 μmol photons m⁻² s⁻¹ and 20 °C using fit coefficients from Table 1.

CO ₂ optima ( μ mol kg ⁻¹ )

V _max (pg C cell ⁻¹ d ⁻¹ or d ⁻¹ )

\({\bf{K}}\tfrac{1}{2}{}_{{\bf{C}}{{\bf{O}}}_{2}}{\bf{i}}{\bf{nhib}}\) ( μ mol kg ⁻¹ )

\({\bf{K}}\tfrac{1}{2}{}_{{\bf{C}}{{\bf{O}}}_{2}}{\bf{s}}{\bf{at}}\) ( μ mol kg ⁻¹ )