Abscisin II, an Abscission-Accelerating Substance from Young Cotton Fruit

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Science  20 Dec 1963:
Vol. 142, Issue 3599, pp. 1592-1593
DOI: 10.1126/science.142.3599.1592


Crystalline abscisin II, with a tentative molecular formula of C15H20O4, has been isolated from young cotton fruit. It accelerates abscission when applied in amounts as low as 0.01 µg per abscission zone. It inhibits indoleacetic acid-induced straight growth of Avena coleoptiles but has no gibberellin activity on dwarf maize.