Effect of Growth Substances on the Osmotic Value of Pea Stem Sections


IT has been shown that gibberellin does not increase the extensibility of the pea stem, while auxin does1,2. It thus remains to show whether gibberellin increases the osmotic concentration in cells, so as to increase water absorption. As to the effect of auxin on the osmotic concentration, conflicting results have been reported3–5. The present communication reports some experiments which reveal that gibberellin causes catatonosis while auxin causes anatonosis.

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  1. 1

    Yoda, S., and Ashida, J., Nature, 182, 879 (1958).

  2. 2

    Yoda, S., and Ashida, J., Plant and Cell Physiol. (in the press).

  3. 3

    Commoner, B., Fogel, S., and Muller, W. H., Amer. J. Bot., 30, 23 (1943).

  4. 4

    Van Overbeek, J., Amer. J. Bot., 31, 265 (1944).

  5. 5

    Hackett, D. P., Plant Physiol., 27, 279 (1952).

  6. 6

    Obermiller, J., Z. phys. Chem., 109, 154 (1924).

  7. 7

    Landolt-Börnstein, “Phys.-Chem. Tabellen”, II-2, 1319 (1931).

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YODA, S., ASHIDA, J. Effect of Growth Substances on the Osmotic Value of Pea Stem Sections. Nature 188, 600–601 (1960). https://doi.org/10.1038/188600a0

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