Organic acid and potassium accumulation in guard cells during stomatal opening.

@article{Outlaw1977OrganicAA,
  title={Organic acid and potassium accumulation in guard cells during stomatal opening.},
  author={William H. Outlaw and Oliver H. Lowry},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1977},
  volume={74 10},
  pages={4434-8}
}
Leaflets of Vicia faba L. with either open or closed stomata were quick-frozen and freeze-dried. Individual guard cell pairs and pure samples of palisade parenchyma, spongy parenchyma, and epidermis lacking guard cells were dissected from the leaflets, weighed, and assayed for organic acids or K(+).K(+) was measured by a new enzymatic method. In guard cells of open stomata, as compared to closed stomata, K(+) was 2- to 4-fold higher, malic acid 6-fold higher, and citric acid 3-fold higher. Both… CONTINUE READING
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