Abstract

Abstract UBI-P293 (2-3-dihydro-5,6-diphenyl-l,4 oxathiin) applied to stem tips of Chrysanthemum X morifolium ‘Paragon’ inhibited stem elongation and promoted formation of lateral branches without apex removal. Treated shoot apexes were inhibited temporarily in their development and in endogenous auxin activity as indicated by bioassay. There was a negative growth response of bean sections treated with extracts from tips for 4 days after treatment with UBI-P293 at 0.02 m, and this concentration led to a disruption of normal organization within the apex.

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