Membrane permeability to CO2

Range best estimate 0.24 cm/sec: minimal estimate 0.037 cm/sec
Organism Diatom Fragilariopsis cylindrus
Reference Kranz SA, Young JN, Hopkinson BM, Goldman JA, Tortell PD, Morel FM. Low temperature reduces the energetic requirement for the CO2 concentrating mechanism in diatoms. New Phytol. 2015 Jan205(1):192-201. doi: 10.1111/nph.12976 p.196 right column bottom paragraphPubMed ID25308897
Comments P.196 right column bottom paragraph: "In the quantitative interpretation of these experiments at low temperature, the boundary layer outside of the cells presents a significant barrier to the diffusion of CO2, on the same order as the plasmalemma itself. This importance of boundary layer, which results from the two‐fold decrease in the diffusion coefficient of CO2 between 20 and 0°C (Boudreau, 1997), makes [investigators'] estimation of the membrane permeability to CO2 relatively imprecise, with a minimal permeability c. 10‐fold lower than the best estimate (best estimate: 2.4 × 10^−1 cm/s, minimal estimate: 3.7 × 10^−2 cm/s)."
Entered by Uri M
ID 116830