High-affinity binding sites for abscisic acid on the plasmalemma of Vicia faba guard cells

@article{Hornberg1984HighaffinityBS,
  title={High-affinity binding sites for abscisic acid on the plasmalemma of Vicia faba guard cells},
  author={Claudia Hornberg and Elmar W. Weiler},
  journal={Nature},
  year={1984},
  volume={310},
  pages={321-324}
}
Stomata have a key role in the regulation of gas exchange and water economy in higher plants1,2. During water stress, they close in response to abscisic acid (ABA), a hormonal stimulus thought to be released or produced de novo in the mesophyll of leaves3,4, and probably in the guard cells of the stomata themselves5. By a mechanism still unknown, ABA affects the ionic balance of guard cells, resulting in a loss of K+, their major osmotically active constituent1,6. The structural requirements… CONTINUE READING

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