An Auxin-like Action of Coumarin
- 19 June 1959
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 129 (3364) , 1675-1676
- https://doi.org/10.1126/science.129.3364.1675
Abstract
Coumarin, usually regarded as an inhibitor of growth processes in plants, markedly stimulated the elongation of excised segments of Helianthus hypocotyls. Substitution in the molecule of hydroxy-, methyl-, or chloro-groups, in the neighborhood of the unsaturated bond in the lactone ring, markedly altered the growth-promoting activity.Keywords
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