Plant and Soil

, Volume 72, Issue 2–3, pp 231–237 | Cite as

Variation among species and varieties in uptake and utilization of potassium

  • S. Pettersson
  • P. Jensén
Article

Summary

In uptake experiments from water cultures K+-influx in roots of sunflower (Helianthus annuus L.), cucumber (Cucumis sativus L.), birch (Betula verrucosa Ehrh.), lingonberry (Vaccinium vitis-idaea L.), and pine (Pinus silvestris L.) was related to the K+-contents of the roots. However, due to genotypic variation, no universal “optimum” K+-state of the roots for maximum K+-influx could be defined.

Ranking of Rb+ (K+-influxes into high K+ and low K+ roots of 11 cultivars of barley (Hordeum vulgare L.) brought the same sequence but the varietal differences were relatively greater in the high K+ roots.

Net K+ fluxes in barley roots were not related to K+-influxes due apparently to varietal differences in K+ effluxes from the roots.

Dry matter production per weight unit of K+ present in the plants (K+ use efficiency) was not related to the K+-influxes of the roots in the barley cultivars.

It is concluded that several both morphological and physiological plant parameters must be evaluated and combined before selecting varieties for efficient mineral nutrient exploitation is possible.

Key words

Barley Potassium efflux Potassium influx Varietal differences 

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References

  1. 1.
    Glass A D M and Perley J E 1980 Varietal differences in potassium uptake by barley. Plant Physiol. 65, 160–164.Google Scholar
  2. 2.
    Glass A D M, Siddiqi H G and Giles K I 1981 Correlations between potassium uptake and hydrogen efflux in barley varieties. Plant Physiol. 68, 457–459.Google Scholar
  3. 3.
    Jensén P and Pettersson S 1978 Allosteric regulation of potassium uptake in plant roots. Physiol. Plant. 42, 207–213.Google Scholar
  4. 4.
    Jensén P and Pettersson S 1980 Varietal variation in uptake and utilization of potassium (rubidium) in high-salt seedlings of barley. Physiol. Plant. 48, 411–415.Google Scholar
  5. 5.
    Pettersson S 1978 Varietal differences in rubidium uptake efficiency of barley roots. Physiol. Plant. 44, 1–6.Google Scholar
  6. 6.
    Pettersson S and Jensén P 1978 Allosteric and non-allosteric regulation of rubidium influx in barley roots. Physiol. Plant. 45, 110–114.Google Scholar
  7. 7.
    Schimansky C and Marschner H 1971 Suitability of Rb-86 as a tracer for potassium in studies relating to potassium uptake by maize, sugar beet and four varieties of barley. Z. Pflanzenernaehr. Bodenkd. 129, 141–147.Google Scholar
  8. 8.
    Williams R F 1948 The effects of phosphorus supply on the rates of intake of phosphorus and nitrogen upon certain aspects of phosphorus metabolism in gramineous plants. Aust. J. Sci. Res. (B) 1, 333–361.Google Scholar

Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1983

Authors and Affiliations

  • S. Pettersson
    • 1
    • 2
  • P. Jensén
    • 1
    • 2
  1. 1.Department of Plant PhysiologySwedish University of Agricultural SciencesUppsala 7Sweden
  2. 2.Department of Plant PhysiologyUniversity of LundLundSweden

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