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Identification and Estimation of (+)-Abscisin II (‘Dormin’) in Plant Extracts by Spectropolarimetry

Nature volume 210, pages 627–628 (1966)Cite this article

Abstract

ABSCISIN II is a recently discovered1,2 plant hormone which appears to inhibit the action of auxins, gibberellins and kinins3. Its structure4 (I) contains one centre of asymmetry, and a comparison of its properties with those of synthetic5 (±)-abscisin II suggested that the natural substance is a single enantiomorph. We have now measured the optical rotatory dispersion of abscisin II from sycamore leaves2, and find that the hormone from this source is dextro-rotatory and exhibits a very intense positive Cotton effect with extrema at 287 mµ ([α] + 24,000°) and 245 mµ ([α] − 69,000°):

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Authors and Affiliations

  1. ‘Shell’ Research, Ltd., Milstead Laboratory, Broad Oak Road, Sittingbourne, Kent

    J. W. CORNFORTH, B. V. MILBORROW & G. RYBACK

Authors
  1. J. W. CORNFORTH
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  2. B. V. MILBORROW
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  3. G. RYBACK
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CORNFORTH, J., MILBORROW, B. & RYBACK, G. Identification and Estimation of (+)-Abscisin II (‘Dormin’) in Plant Extracts by Spectropolarimetry. Nature 210, 627–628 (1966). https://doi.org/10.1038/210627a0

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