Further Evidence of Polar Movement of Nutrients in Plants


IN two earlier papers I showed that there was good evidence for postulating polar rather than transverse movement of materials in plants1a,b. This conclusion was supported by later work on the movement of fluorescein in the xylem system1c, of labelled carbon2 and of labelled phosphorus3. The two last papers describe experiments which show that carbon-14 or phosphorus-32 when introduced on one side into the leaves or the roots respectively of plants pass freely and rapidly up to the tissues on that side, but do not move transversely across the plant.

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  1. 1

    Caldwell, J., (a) Proc. Roy. Soc. Edin., 50 (1929); (b) New Phytologist, 29, 1 (1930); (c) ibid., 52, 3 (1953).

  2. 2

    Jones, H., Martin, R. V., and Porter, H. K., Ann. Bot. (N.S.), 23, 92 (1959).

  3. 3

    Rinne, R. W., and Langston, R. C., Plant Phys., 35, 2 (1960).

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CALDWELL, J. Further Evidence of Polar Movement of Nutrients in Plants. Nature 190, 1028–1029 (1961). https://doi.org/10.1038/1901028a0

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