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Lacan D, Durand M. Na+-K+ Exchange at the Xylem/Symplast Boundary (Its Significance in the Salt Sensitivity of Soybean). Plant Physiol. 1996;110(2):705-711doi: 10.1104/pp.110.2.705.
Lacan, D., & Durand, M. (1996). Na+-K+ Exchange at the Xylem/Symplast Boundary (Its Significance in the Salt Sensitivity of Soybean). Plant physiology, 110(2), 705-711. https://doi.org/10.1104/pp.110.2.705
Lacan, D., and Durand, M.. "Na+-K+ Exchange at the Xylem/Symplast Boundary (Its Significance in the Salt Sensitivity of Soybean)." Plant physiology vol. 110,2 (1996): 705-711. doi: https://doi.org/10.1104/pp.110.2.705
Lacan D, Durand M. Na+-K+ Exchange at the Xylem/Symplast Boundary (Its Significance in the Salt Sensitivity of Soybean). Plant Physiol. 1996 Feb;110(2):705-711. doi: 10.1104/pp.110.2.705. PMID: 12226212; PMCID: PMC157767.
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Plant Physiol. 1996 Feb;110(2):705-711. doi: 10.1104/pp.110.2.705.

Na+-K+ Exchange at the Xylem/Symplast Boundary (Its Significance in the Salt Sensitivity of Soybean).

Plant physiology

D. Lacan, M. Durand

Affiliations

  1. Laboratoire de Recherches sur les Substances Naturelles Vegetales, Universite Montpellier II, Sciences et Techniques du Languedoc, Place E, Bataillon, 34095 Montpellier Cedex 5, France.

PMID: 12226212 PMCID: PMC157767 DOI: 10.1104/pp.110.2.705

Abstract

We investigated the mechanism of Na+ reabsorption in exchange for K+ at the xylem/symplast boundary of soybean roots (Glycine max var Hodgson). The xylem vessels of excised roots were perfused with solutions of defined composition to discriminate between entry of ions into or reabsorption from the xylem vessels. In the presence of NaCl, the transport systems released K+ into the xylem sap and reabsorbed Na+. The Na+-K+ exchange was energized by proton-translocating ATPases, enhanced by external K+ concentration, and dependent on the anion permeability. Evidence was presented for the operation of H+/Na+ and H+/K+ antiporters at the xylem/symplast interface.

References

  1. Plant Physiol. 1986 Nov;82(3):846-52 - PubMed
  2. Plant Physiol. 1990 Dec;94(4):1561-7 - PubMed
  3. Plant Physiol. 1991 May;96(1):110-5 - PubMed

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