A Growth Inhibitor from Young Expanding Tobacco Leaves

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Science  20 Nov 1970:
Vol. 170, Issue 3960, pp. 856-857
DOI: 10.1126/science.170.3960.856


Extracts of expanding tobacco leaves inhibit the growth of wheat coleoptiles. Infrared, ultraviolet, and mass spectroscopy show that the active component is neither abscisin nor an aromatic structure.