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Phytochrome and potassium uptake by mung bean hypocotyl sections

✍ Scribed by Colin Brownlee; Richard E. Kendrick

Book ID: 104754308
Publisher: Springer-Verlag
Year: 1977
Tongue: English
Weight: 316 KB
Volume: 137
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00394436

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✦ Synopsis

Uptake of potassium (K) and (86)rubidiumlabelled potassium ((86)Rb) 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 (86)Rb-labelled K uptake was observed after 5 min. The response showed no specificity for a particular anion. Uptake of (86)Rb-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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