Transport Properties of the Tomato Fruit Tonoplast : III. Temperature Dependence of Calcium Transport.

@article{Joyce1988TransportPO,
  title={Transport Properties of the Tomato Fruit Tonoplast : III. Temperature Dependence of Calcium Transport.},
  author={Diane C. Joyce and Grant R Cramer and Michael Stuart Reid and Alan B Bennett},
  journal={Plant physiology},
  year={1988},
  volume={88 4},
  pages={1097-103}
}
Calcium transport into tomato (Lycopersicon esculentum Mill, cv Castlemart) fruit tonoplast vesicles was studied. Calcium uptake was stimulated approximately 10-fold by MgATP. Two ATP-dependent Ca(2+) transport activities could be resolved on the basis of sensitivity to nitrate and affinity for Ca(2+). A low affinity Ca(2+) uptake system (K(m) > 200 micromolar) was inhibited by nitrate and ionophores and is thought to represent a tonoplast localized H(+)/Ca(2+) antiport. A high affinity Ca(2… CONTINUE READING

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