Abstract
NATURE of January 17 has just reached me and I hasten to send a reply to Mr. Snow's letter on this subject. I repeat once more that in the numerous experiments which I carried out with the stem of Mimosa pudica, the stimulus was never transmitted across the water gap. Mr. Snow repudiates the idea that he has disagreed with my conclusions in regard to the conduction in the petiole of Mimosa. “Actually, however,” he says in his letter, in agreement with him [Sir J. C. Bose] I have produced evidence to show that in the leaf, excitation is conducted in the phloem and has nothing to do with the transpiration current. I agree also that this conduction in the leaf is, in all probability, a true physiological process, and consider that Sir J. C. Bose's experiments on the petiole, which so strongly support this view, are of very great value. In the stem, however, as I found, this conduction in the phloem either fails completely, or at least is regularly too weak to cause the leaves to fall."
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BOSE, J. Transmission of Stimuli in Plants. Nature 115, 457 (1925). https://doi.org/10.1038/115457a0
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DOI: https://doi.org/10.1038/115457a0
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