Abstract
THE evidence collected so far for an effect of growth-promoting concentrations of auxins on cation uptake by plant cells gives a somewhat confused picture. Auxins have been variously reported as promotive, inhibitory, or without effect, according to the conditions of the investigation1–5. I wish to report here experiments yielding clear evidence for a marked effect of indolyl-3-acetic acid (IAA) on potassium and ammonium uptake by segments of sunflower hypocotyl. In the case of potassium the effect is stimulatory, in that of ammonium, inhibitory.
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References
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ILAN, I. A Specific Stimulatory Action of Indolyl-3-Acetic Acid on Potassium Uptake by Plant Cells, with Concomitant Inhibition of Ammonium Uptake. Nature 194, 203–204 (1962). https://doi.org/10.1038/194203a0
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DOI: https://doi.org/10.1038/194203a0
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