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Effect of Gibberellic Acid on Flower Differentiation in Petkus Winter Rye

Nature volume 185, pages 477–479 (1960)Cite this article

Abstract

IT is known that application of gibberellic acid causes flowering of many biennials (Hyoscyamus, Apium, Brassica, Daucus, etc.)1. In these cases gibberellic acid substitutes for cold (vernalization) treatment. Treatment of winter cereals (Petkus rye2, barley3, winter wheat4) with gibberellic acid, on the contrary, has been found to have no effect on the induction of normal flowers. Chaylakhian5 has reported that treatment of non-vernalized oats, variety Victory, with gibberellic acid, under short-day conditions, caused formation of an increased number of developed panicles. This was not the case under long-day conditions. Paleg and Aspinall3 have reported that treatment of barley with gibberellic acid for several weeks immediately following emergence results in the formation of abnormal spikes.

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Authors and Affiliations

  1. Division of Biology, California Institute of Technology, Pasadena, California

    O. H. CASO, H. R. HIGHKIN & D. KOLLER

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  1. O. H. CASO
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  2. H. R. HIGHKIN
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  3. D. KOLLER
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CASO, O., HIGHKIN, H. & KOLLER, D. Effect of Gibberellic Acid on Flower Differentiation in Petkus Winter Rye. Nature 185, 477–479 (1960). https://doi.org/10.1038/185477b0

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