A slow anion channel in guard cells, activating at large hyperpolarization, may be principal for stomatal closing.

@article{Linder1992ASA,
  title={A slow anion channel in guard cells, activating at large hyperpolarization, may be principal for stomatal closing.},
  author={Bertolt Linder and Klaus Raschke},
  journal={FEBS letters},
  year={1992},
  volume={313 1},
  pages={27-30}
}
Slowly activating anion channel currents were discovered at micromolar 'cytoplasmic' Ca2+ during patch-clamp measurements on guard-cell protoplasts of Vicia faba and Xanthium strumarium. They activated at potentials as low as -200 mV, with time constants between 5 and 60 s, and no inactivation. The broad voltage dependence exhibited a current maximum near -40 mV. The single-channel open time was in the order of seconds, and the unitary conductance was 33 ps, similar to that of the already… CONTINUE READING

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