Abstract
During a 1-year cycle the acidic, ethyl acetate soluble gibberellinlike activity in the phloem sap of the emergent male inflorescence of the oil palm tree (Elaesis guineensis Jacq.) was assayed with barley half-seeds after separation on paper chromatography. Gibberellinlike substances which cochromatograph with gibberellic acid 3 were translocated to the male emerging inflorescence stalk. Their quantity was maximal (45 μg L−1 of sap) in late November, and minimal (1.5 μg L−1 of sap) during March to August.
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