Reduced external calcium or sodium stimulates calcium influx in Pelvetia eggs

@article{Robinson1977ReducedEC,
  title={Reduced external calcium or sodium stimulates calcium influx in Pelvetia eggs},
  author={Kenneth R. Robinson},
  journal={Planta},
  year={1977},
  volume={136},
  pages={153-158}
}
The effect of external calcium and sodium ion concentrations on the calcium fluxes on the Pelvetia fastigiata De Toni egg was measured. Decreasing external [Ca2+] greatly increased the permeability of the eggs to Ca2+; at 1 mM external Ca2+ this permeability was 60 times as great as it was at the normal [Ca2+] of 10 mM. Lowering the external [Na+] also increased Ca2+ influx; at 2 mM Na+, the Ca2+ influx was 2–3 times as great as it was at the normal [Na+] if choline was used as a Na+ substitute… CONTINUE READING