A protein kinase-phosphatase pair interacts with an ion channel to regulate ABA signaling in plant guard cells.

@article{Lee2009APK,
  title={A protein kinase-phosphatase pair interacts with an ion channel to regulate ABA signaling in plant guard cells.},
  author={Sung Chul Lee and Wenzhi Lan and Bob B. Buchanan and Sheng Luan},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2009},
  volume={106 50},
  pages={21419-24}
}
The plant hormone abscisic acid (ABA) serves as a physiological monitor to assess the water status of plants and, under drought conditions, induces stomatal pore closure by activating specific ion channels, such as a slow-anion channel (SLAC1) that, in turn, mediate ion efflux from the guard cells. Earlier genetic analyses uncovered a protein kinase (OST1) and several 2C-type phosphatases, as respective positive and negative regulators of ABA-induced stomatal closure. Here we show that the OST1… CONTINUE READING
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