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Phytochrome and potassium uptake by mung bean hypocotyl sections

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Abstract

Uptake of potassium (K) and 86rubidiumlabelled potassium (86Rb) by sub-hypocotyl hook sections of Phaseolus aureus L. was inhibited by red light. The effect was reversible with far red light. Using short exposures of high irradiance the effect on 86Rb-labelled K uptake was observed after 5 min. The response showed no specificity for a particular anion. Uptake of 86Rb-labelled K by sections cut immediately below the cotyledons was enhanced by red light after 10 min incubation and was also far red reversible. These results are interpreted as a rapid phytochrome-induced change in membrane properties resulting in modified K uptake.

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Abbreviations

P:

Phytochrome

Pr:

red absorbing form of P

Pfr:

far red absorbing form of P

R:

red light

F:

far red light

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Authors and Affiliations

  1. Department of Plant Biology, The University, NE1 7RU, Newcastle upon Tyne, UK

    Colin Brownlee & Richard E. Kendrick

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  1. Colin Brownlee
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  2. Richard E. Kendrick
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Brownlee, C., Kendrick, R.E. Phytochrome and potassium uptake by mung bean hypocotyl sections. Planta 137, 61–64 (1977). https://doi.org/10.1007/BF00394436

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  • DOI: https://doi.org/10.1007/BF00394436

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