Abstract
IN a recent paper, Galston1 has shown that βindoleacetic acid, at concentrations of 1–10 p.p.m., inhibits the growth in the dark of excised stem tips of Asparagus, in contrast to its normal stimulating effect in the light. Nicotinic acid, at a concentration of 0.5 p.p.m., was shown greatly to augment this dark inhibition, although without any effect by itself. These results were regarded as indicating that nicotinic acid is involved in the growth-regulating action of β-indoleacetic acid.
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References
Galston, A. W., J. Biol. Chem., 169, (2), 465 (1947).
Audus, L. J., and Quastel, J. H., Ann. Bot., N.S., 12, (45), 27 (1948).
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AUDUS, L. Nicotinic Acid and the Inhibition of Growth by Auxin. Nature 162, 811–812 (1948). https://doi.org/10.1038/162811b0
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DOI: https://doi.org/10.1038/162811b0
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