A protein phosphatase 2A catalytic subunit is a negative regulator of abscisic acid signalling.

@article{Pernas2007APP,
  title={A protein phosphatase 2A catalytic subunit is a negative regulator of abscisic acid signalling.},
  author={M{\'o}nica Pernas and Gloria Garc{\'i}a-Casado and Enrique Rojo and Roberto Solano and Jos{\'e} Juan S{\'a}nchez-Serrano},
  journal={The Plant journal : for cell and molecular biology},
  year={2007},
  volume={51 5},
  pages={763-78}
}
The key regulatory role of abscisic acid (ABA) in many physiological processes in plants is well established. However, compared with other plant hormones, the molecular mechanisms underlying ABA signalling are poorly characterized. In this work, a specific catalytic subunit of protein phosphatase 2A (PP2Ac-2) has been identified as a component of the signalling pathway that represses responses to ABA. A loss-of-function pp2ac-2 mutant is hypersensitive to ABA. Moreover, pp2ac-2 plants have… CONTINUE READING
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