Control of ion absorption by phytochrome
- 1 January 1975
- journal article
- Published by Springer Nature in Planta
- Vol. 122 (3), 239-244
- https://doi.org/10.1007/bf00385271
Abstract
Phosphate absorption by segments excised from hypocotyls of Phaseolus aureus Roxb. was inhibited by either continuous or short-term illumination with red light. Maximal inhibition was observed at pH 6.5. Illumination with 800 erg cm-2 s-1 of red light for 5 min was sufficient to obtain maximal inhibition. The effect of red light was completely counteracted by illumination.with 4500 erg cm-2 s-1 of far red light for 3 min, indicating that the effect was mediatedy by phytochrome. The efflux of phosphate from the segments was not altered by illumination. Similar effects of red and far-red light on potassium influx and efflux were also found.Keywords
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