Pump-leak sodium fluxes in low salt corn roots

  title={Pump-leak sodium fluxes in low salt corn roots},
  author={John M. Cheeseman},
  journal={The Journal of Membrane Biology},
The influx and efflux of sodium from 4-hr washed, low salt corn roots (Zea mays L.) has been studied for characterization of passive and active components. Initial Na+ content of the roots is very low, 2.25±0.4 μmol/g fresh weight. Na+ influx in the presence of 0.2mm Ca2+ and 0.002 to 20mm K+ is passive (a “leak”) based upon Goldman-type models, being determined by Na+ and cell potential (ψ). Na+ was not transported by the K+ carrier and influx was unaffected by 50 μm dicyclohexylcarbodiimide… CONTINUE READING
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