New Natural Growth Promoting Substance in Young Citrus Fruit

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Science  18 Oct 1963:
Vol. 142, Issue 3590, pp. 399-400
DOI: 10.1126/science.142.3590.399


A naturally occurring compound that induces curvature in the Avena coleoptile test has been found in young orange fruits. Cochromatography with C14-labeled indole-3-acetic acid, plus excitation and fluorescence spectra determinations, indicates that this compound is not one of the known indoles or gibberellins.