Transmission of Stimuli in Plants


IN an article in NATURE of October 25 Prof. Dixon1 has reviewed an investigation of conduction in Mimosa pudica which I lately carried out in Trinidad.2 He agrees with my conclusion that “normal” conduction in the stem has been correctly explained by Dr. Ricca as depending on a stimulant moving with the transpiration current in the wood, but disagrees in that he inclines to consider that Dr. Ricca's explanation is adequate to cover all the phenomena of conduction in Mimosa, including conduction in the leaf and the subordinate phenomenon of “high-speed” conduction in the stem. He offers no positive evidence tending to support this view, but criticises the evidence from which I have concluded that Dr. Ricca's explanation will not cover the whole ground.

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  1. 1

    Dixon, H. H., NATURE, vol. 136, p. 626, October 25, 1924.

  2. 2

    Snow, R., Proc. R.S., B, vol. 96, p. 349, 1924.

  3. 3

    Herbert, D. A., The Philippine Agriculturist, vol. 11, No. 5, 1922.

  4. 4

    Böde, H. R., Jahrb. f. wiss. Bot., vol. 62, 1923.

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SNOW, R. Transmission of Stimuli in Plants. Nature 115, 82–83 (1925) doi:10.1038/115082a0

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