Abstract
BY growing sunflower plants which have already developed their lower leaves in nutritive solutions containing radioactive phosphorus, Prof. G. Hevesy, K. Linderstr0m-Lang and C. Olsen find that, as in the case of the maize plant, a considerable migration of phosphorus atoms takes place from the lower to the upper leaves during the subsequent growth. The bulk of the phosphorus is present as inorganic phosphate, and probably moves about in the plant, but none of it escapes when cut leaves are placed in a nutritive solution. Germinating maize and pea seeds irake up the labelled (radioactive) phosphorus in the germ but not in the endosperm, showing that there is no phosphorus exchange between the two.
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Points from Foregoing Letters. Nature 139, 157 (1937). https://doi.org/10.1038/139157b0
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DOI: https://doi.org/10.1038/139157b0
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