Summary
CCC was shown to be effective in retarding stem growth of sunflower; this effect was overcome by gibberellic-acid application. Using an agar-diffusion technique, the gibberellin (GA) content of sunflower apices treated with CCC was found to be significantly reduced as compared to controls. Similarly, the GA content of agar diffusates obtained from 2-day-old sunflower root tips treated with CCC was also significantly reduced as compared to controls.
Root exudate or bleeding sap obtained from mature CCC treated sunflower plants contained no measurable GA-like substance, although it could not be argued that this was due to suppression of GA synthesis in the root systems.
Similar content being viewed by others
Bibliography
Baldev, B., A. Lang, and A. O. Agatep: Gibberellin production in pea seeds developing in excised pods. Effect of growth retardant AMO-1618. Science 147, 155–157 (1965).
Carr, D. J., D. M. Reid, and K. G. M. Skeene: The supply of gibberellins from the root to the shoot. Planta (Berl.) 63, 382–392 (1964).
Dennis, D. T., C. D. Upper, and C. A. West: An enzymic site of inhibition gibberellin biosynthesis by AMO-1618 and other plant growth retardants. Plant Physiol. 40, 948–952 (1965).
Frankland, B., and P. F. Wareing: Effect of gibberellic on hypocotyl growth of lettuce seedlings. Nature (Lond.) 185, 255–256 (1960).
Harada, H., and A. Lang: Effect of some (2 chlorethyl) trimethylammonium chloride analogs and other growth retardants on gibberellin biosynthesis in Fusarium moniliforme. Plant Physiol. 40, 176–183 (1965).
Jones, R. L. and I. D. J. Phillips: Agar-diffusion technique for estimating gibberellin production by plant organs. Nature (Lond.) 204, 497–499 (1964).
Jones, R. L. and I. D. J. Phillips: Organs of gibberellin synthesis in light grown sunflower plants. Plant Physiol. (in press).
Kende, H., H. Ninnemann, and A. Lang: Inhibition of gibberellic acid biosynthesis in Fusarium moniliforme by AMO-1618 and CCC. Naturwissenschaften 50, 599–600 (1963).
Ninnemann, H., H. Kende, J. A. D. Zeevaart, and A. Lang: The plant growth retardant CCC as inhibitor of gibberellin biosynthesis in Fusarium moniliforme. Planta (Berl.) 61, 229–235 (1964).
Phillips, I. D. J., and R. L. Jones: Gibberellin-like activity in bleeding sap of root systems of Helianthus annuus detected by a new dwarf pea epicotyl assay and other methods. Planta (Berl.) 63, 269–278 (1964).
Zeevaart, J. A. D.: Reduction of the gibberellin content of Pharbitis seeds by CCC and after-effects in the progeny. Plant Physiol. 41, 856–862 (1966).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jones, R.L., Phillips, I.D.J. Effect of CCC on the gibberellin content of excised sunflower organs. Planta 72, 53–59 (1966). https://doi.org/10.1007/BF00388144
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00388144