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Gibberellins and geotropism in Zea mays coleoptiles

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Summary

Diffusible gibberellins were obtainable in agar from excised 4 mm tips of etiolated coleoptiles of Zea mays. Placing the tips in a horizontal position increased the total yield of gibberellins by approximately five times. With horizontal tips, the ratio of gibberellin activity recovered from lower and upper halves, expressed as a percentage of total yield, was 80.76:19.24 (lower:upper).

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Authors and Affiliations

  1. Department of Biology, The University of Calgary, T2N 1N4, Calgary, Alberta, Canada

    I. D. Railton

  2. Department of Biological Sciences, Exeter University, EX4 4QG, Exeter, Devon, U.K.

    I. D. J. Phillips

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  1. I. D. Railton
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  2. I. D. J. Phillips
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Railton, I.D., Phillips, I.D.J. Gibberellins and geotropism in Zea mays coleoptiles. Planta 109, 121–126 (1973). https://doi.org/10.1007/BF00386119

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  • DOI: https://doi.org/10.1007/BF00386119

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