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. 1991 Apr;95(4):1265–1269. doi: 10.1104/pp.95.4.1265

Enhanced Net K+ Uptake Capacity of NaCl-Adapted Cells 1

Abd-Elrahem A Watad 1,2,3, Moshe Reuveni 1,2,3, Ray A Bressan 1,2,3, Paul M Hasegawa 1,2,3
PMCID: PMC1077683  PMID: 16668122

Abstract

Maintenance of intracellular K+ concentrations that are not growth-limiting, in an environment of high Na+, is characteristic of NaCl-adapted cells of the glycophyte, tobacco (Nicotiana tabacum/gossii). These cells exhibited a substantially greater uptake of 86Rb+ (i.e. an indicator of K+) relative to unadapted cells. Potassium uptake into NaCl-adapted cells was 1.5-fold greater than unadapted cells at 0 NaCl and 3.5-fold greater when cells were exposed to 160 millimolar NaCl. The difference in net K+ uptake between unadapted and NaCl-adapted cells was due primarily to higher rates of entry rather than to reduced K+ leakage. Presumably, enhanced K+ uptake into adapted cells is a result of electrophoretic flux, and a component of uptake may be linked to vanadate-sensitive H+ extrusion.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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