Abstract
It is shown that the apparent uptake of bicarbonate by cells of Chara corallina could be the result of a proton efflux coupled to extracellular production of CO2 from bicarbonate, with CO2 being taken up by the cell. The theoretical results presented here show that the influx of CO2 across the plasmalemma can be much greater than previously thought, if there is a large efflux of protons across the plasmalemma, and that, if this occurs, there would be a much steeper gradient of pH near the cell surface than previously thought possible.
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Selected References
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