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The effect of shoot-root ratio and temperature on K+ influx in rye

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Abstract

The temperature sensitivity of K+ influx into rye roots and root plasma membrane ATPase activity were compared in plants grown at different temperatures. It was shown that ATPase activity obeyed the Arrhenius relationship with temperature, whereas K+ influx into intact plants was linearly related to temperature and markedly influenced by shoot/root ratio. A model for acclimation of K+ influx to low temperatures based on the regulation of the K+ carrier mechanism by plant ‘demand’ for K+ is described.

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Abbreviations

DT:

differential temperature pretreatment

Ea:

activation energy

[K+]cyt:

cytoplasmic potassium concentration

[K+]ext:

potassium concentration of nutrient medium

[K+]int:

root potassium concentration

WG:

warm grown pretreatment

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Authors and Affiliations

  1. Department of Botany, University of Edinburgh, The King's Buildings, Mayfield Road, EH9 3JH, Edinburgh, UK

    Philip J. White

  2. Department of Cell and Structural Biology, University of Manchester Williamson Building, Oxford Road, M13 9PL, Manchester, UK

    Michael J. Earnshaw

  3. Long Ashton Research Station, University of Bristol, Long Ashton, BS18 9AF, Bristol, UK

    David T. Clarkson

Authors
  1. Philip J. White
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  2. Michael J. Earnshaw
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  3. David T. Clarkson
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White, P.J., Earnshaw, M.J. & Clarkson, D.T. The effect of shoot-root ratio and temperature on K+ influx in rye. Plant Soil 111, 245–248 (1988). https://doi.org/10.1007/BF02139947

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